Extensions
*
* See {@link Extension} and {@link DataExtension}.
*
* Permission Control
*
* Object-level access control by {@link Permission}. Permission codes are arbitrary
* strings which can be selected on a group-by-group basis.
*
*
* class Article extends DataObject implements PermissionProvider {
* static $api_access = true;
*
* function canView($member = false) {
* return Permission::check('ARTICLE_VIEW');
* }
* function canEdit($member = false) {
* return Permission::check('ARTICLE_EDIT');
* }
* function canDelete() {
* return Permission::check('ARTICLE_DELETE');
* }
* function canCreate() {
* return Permission::check('ARTICLE_CREATE');
* }
* function providePermissions() {
* return array(
* 'ARTICLE_VIEW' => 'Read an article object',
* 'ARTICLE_EDIT' => 'Edit an article object',
* 'ARTICLE_DELETE' => 'Delete an article object',
* 'ARTICLE_CREATE' => 'Create an article object',
* );
* }
* }
*
*
* Object-level access control by {@link Group} membership:
*
* class Article extends DataObject {
* static $api_access = true;
*
* function canView($member = false) {
* if(!$member) $member = Member::currentUser();
* return $member->inGroup('Subscribers');
* }
* function canEdit($member = false) {
* if(!$member) $member = Member::currentUser();
* return $member->inGroup('Editors');
* }
*
* // ...
* }
*
*
* If any public method on this class is prefixed with an underscore,
* the results are cached in memory through {@link cachedCall()}.
*
*
* @todo Add instance specific removeExtension() which undos loadExtraStatics()
* and defineMethods()
*
* @package framework
* @subpackage model
*
* @property integer ID ID of the DataObject, 0 if the DataObject doesn't exist in database.
* @property string ClassName Class name of the DataObject
* @property string LastEdited Date and time of DataObject's last modification.
* @property string Created Date and time of DataObject creation.
*/
class DataObject extends ViewableData implements DataObjectInterface, i18nEntityProvider {
/**
* Human-readable singular name.
* @var string
* @config
*/
private static $singular_name = null;
/**
* Human-readable plural name
* @var string
* @config
*/
private static $plural_name = null;
/**
* Allow API access to this object?
* @todo Define the options that can be set here
* @config
*/
private static $api_access = false;
/**
* Allows specification of a default value for the ClassName field.
* Configure this value only in subclasses of DataObject.
*
* @config
* @var string
*/
private static $default_classname = null;
/**
* True if this DataObject has been destroyed.
* @var boolean
*/
public $destroyed = false;
/**
* The DataModel from this this object comes
*/
protected $model;
/**
* Data stored in this objects database record. An array indexed by fieldname.
*
* Use {@link toMap()} if you want an array representation
* of this object, as the $record array might contain lazy loaded field aliases.
*
* @var array
*/
protected $record;
/**
* Represents a field that hasn't changed (before === after, thus before == after)
*/
const CHANGE_NONE = 0;
/**
* Represents a field that has changed type, although not the loosely defined value.
* (before !== after && before == after)
* E.g. change 1 to true or "true" to true, but not true to 0.
* Value changes are by nature also considered strict changes.
*/
const CHANGE_STRICT = 1;
/**
* Represents a field that has changed the loosely defined value
* (before != after, thus, before !== after))
* E.g. change false to true, but not false to 0
*/
const CHANGE_VALUE = 2;
/**
* An array indexed by fieldname, true if the field has been changed.
* Use {@link getChangedFields()} and {@link isChanged()} to inspect
* the changed state.
*
* @var array
*/
private $changed;
/**
* The database record (in the same format as $record), before
* any changes.
* @var array
*/
protected $original;
/**
* Used by onBeforeDelete() to ensure child classes call parent::onBeforeDelete()
* @var boolean
*/
protected $brokenOnDelete = false;
/**
* Used by onBeforeWrite() to ensure child classes call parent::onBeforeWrite()
* @var boolean
*/
protected $brokenOnWrite = false;
/**
* @config
* @var boolean Should dataobjects be validated before they are written?
* Caution: Validation can contain safeguards against invalid/malicious data,
* and check permission levels (e.g. on {@link Group}). Therefore it is recommended
* to only disable validation for very specific use cases.
*/
private static $validation_enabled = true;
/**
* Static caches used by relevant functions.
*/
protected static $_cache_has_own_table = array();
protected static $_cache_get_one;
protected static $_cache_get_class_ancestry;
protected static $_cache_composite_fields = array();
protected static $_cache_database_fields = array();
protected static $_cache_field_labels = array();
/**
* Base fields which are not defined in static $db
*
* @config
* @var array
*/
private static $fixed_fields = array(
'ID' => 'PrimaryKey',
'ClassName' => 'DBClassName',
'LastEdited' => 'SS_Datetime',
'Created' => 'SS_Datetime',
);
/**
* Core dataobject extensions
*
* @config
* @var array
*/
private static $extensions = array(
'AssetControl' => '\\SilverStripe\\Filesystem\\AssetControlExtension'
);
/**
* Non-static relationship cache, indexed by component name.
*/
protected $components;
/**
* Non-static cache of has_many and many_many relations that can't be written until this object is saved.
*/
protected $unsavedRelations;
/**
* Return the complete map of fields to specification on this object, including fixed_fields.
* "ID" will be included on every table.
*
* Composite DB field specifications are returned by reference if necessary, but not in the return
* array.
*
* Can be called directly on an object. E.g. Member::database_fields()
*
* @param string $class Class name to query from
* @return array Map of fieldname to specification, similiar to {@link DataObject::$db}.
*/
public static function database_fields($class = null) {
if(empty($class)) {
$class = get_called_class();
}
// Refresh cache
self::cache_database_fields($class);
// Return cached values
return self::$_cache_database_fields[$class];
}
/**
* Cache all database and composite fields for the given class.
* Will do nothing if already cached
*
* @param string $class Class name to cache
*/
protected static function cache_database_fields($class) {
// Skip if already cached
if( isset(self::$_cache_database_fields[$class])
&& isset(self::$_cache_composite_fields[$class])
) {
return;
}
$compositeFields = array();
$dbFields = array();
// Ensure fixed fields appear at the start
$fixedFields = self::config()->fixed_fields;
if(get_parent_class($class) === 'DataObject') {
// Merge fixed with ClassName spec and custom db fields
$dbFields = $fixedFields;
} else {
$dbFields['ID'] = $fixedFields['ID'];
}
// Check each DB value as either a field or composite field
$db = Config::inst()->get($class, 'db', Config::UNINHERITED) ?: array();
foreach($db as $fieldName => $fieldSpec) {
$fieldClass = strtok($fieldSpec, '(');
if(singleton($fieldClass) instanceof DBComposite) {
$compositeFields[$fieldName] = $fieldSpec;
} else {
$dbFields[$fieldName] = $fieldSpec;
}
}
// Add in all has_ones
$hasOne = Config::inst()->get($class, 'has_one', Config::UNINHERITED) ?: array();
foreach($hasOne as $fieldName => $hasOneClass) {
if($hasOneClass === 'DataObject') {
$compositeFields[$fieldName] = 'PolymorphicForeignKey';
} else {
$dbFields["{$fieldName}ID"] = 'ForeignKey';
}
}
// Merge composite fields into DB
foreach($compositeFields as $fieldName => $fieldSpec) {
$fieldObj = Object::create_from_string($fieldSpec, $fieldName);
$fieldObj->setTable($class);
$nestedFields = $fieldObj->compositeDatabaseFields();
foreach($nestedFields as $nestedName => $nestedSpec) {
$dbFields["{$fieldName}{$nestedName}"] = $nestedSpec;
}
}
// Return cached results
self::$_cache_database_fields[$class] = $dbFields;
self::$_cache_composite_fields[$class] = $compositeFields;
}
/**
* Get all database columns explicitly defined on a class in {@link DataObject::$db}
* and {@link DataObject::$has_one}. Resolves instances of {@link DBComposite}
* into the actual database fields, rather than the name of the field which
* might not equate a database column.
*
* Does not include "base fields" like "ID", "ClassName", "Created", "LastEdited",
* see {@link database_fields()}.
*
* Can be called directly on an object. E.g. Member::custom_database_fields()
*
* @uses DBComposite->compositeDatabaseFields()
*
* @param string $class Class name to query from
* @return array Map of fieldname to specification, similiar to {@link DataObject::$db}.
*/
public static function custom_database_fields($class = null) {
if(empty($class)) {
$class = get_called_class();
}
// Get all fields
$fields = self::database_fields($class);
// Remove fixed fields. This assumes that NO fixed_fields are composite
$fields = array_diff_key($fields, self::config()->fixed_fields);
return $fields;
}
/**
* Returns the field class if the given db field on the class is a composite field.
* Will check all applicable ancestor classes and aggregate results.
*
* @param string $class Class to check
* @param string $name Field to check
* @param boolean $aggregated True if parent classes should be checked, or false to limit to this class
* @return string|false Class spec name of composite field if it exists, or false if not
*/
public static function is_composite_field($class, $name, $aggregated = true) {
$fields = self::composite_fields($class, $aggregated);
return isset($fields[$name]) ? $fields[$name] : false;
}
/**
* Returns a list of all the composite if the given db field on the class is a composite field.
* Will check all applicable ancestor classes and aggregate results.
*
* Can be called directly on an object. E.g. Member::composite_fields(), or Member::composite_fields(null, true)
* to aggregate.
*
* Includes composite has_one (Polymorphic) fields
*
* @param string $class Name of class to check
* @param bool $aggregated Include fields in entire hierarchy, rather than just on this table
* @return array List of composite fields and their class spec
*/
public static function composite_fields($class = null, $aggregated = true) {
// Check $class
if(empty($class)) {
$class = get_called_class();
}
if($class === 'DataObject') {
return array();
}
// Refresh cache
self::cache_database_fields($class);
// Get fields for this class
$compositeFields = self::$_cache_composite_fields[$class];
if(!$aggregated) {
return $compositeFields;
}
// Recursively merge
return array_merge(
$compositeFields,
self::composite_fields(get_parent_class($class))
);
}
/**
* Construct a new DataObject.
*
* @param array|null $record This will be null for a new database record. Alternatively, you can pass an array of
* field values. Normally this contructor is only used by the internal systems that get objects from the database.
* @param boolean $isSingleton This this to true if this is a singleton() object, a stub for calling methods.
* Singletons don't have their defaults set.
* @param DataModel $model
* @param array $queryParams List of DataQuery params necessary to lazy load, or load related objects.
*/
public function __construct($record = null, $isSingleton = false, $model = null, $queryParams = array()) {
parent::__construct();
// Set query params on the DataObject to tell the lazy loading mechanism the context the object creation context
$this->setSourceQueryParams($queryParams);
// Set the fields data.
if(!$record) {
$record = array(
'ID' => 0,
'ClassName' => get_class($this),
'RecordClassName' => get_class($this)
);
}
if(!is_array($record) && !is_a($record, "stdClass")) {
if(is_object($record)) $passed = "an object of type '$record->class'";
else $passed = "The value '$record'";
user_error("DataObject::__construct passed $passed. It's supposed to be passed an array,"
. " taken straight from the database. Perhaps you should use DataList::create()->First(); instead?",
E_USER_WARNING);
$record = null;
}
if(is_a($record, "stdClass")) {
$record = (array)$record;
}
// Set $this->record to $record, but ignore NULLs
$this->record = array();
foreach($record as $k => $v) {
// Ensure that ID is stored as a number and not a string
// To do: this kind of clean-up should be done on all numeric fields, in some relatively
// performant manner
if($v !== null) {
if($k == 'ID' && is_numeric($v)) $this->record[$k] = (int)$v;
else $this->record[$k] = $v;
}
}
// Identify fields that should be lazy loaded, but only on existing records
if(!empty($record['ID'])) {
$currentObj = get_class($this);
while($currentObj != 'DataObject') {
$fields = self::custom_database_fields($currentObj);
foreach($fields as $field => $type) {
if(!array_key_exists($field, $record)) $this->record[$field.'_Lazy'] = $currentObj;
}
$currentObj = get_parent_class($currentObj);
}
}
$this->original = $this->record;
// Keep track of the modification date of all the data sourced to make this page
// From this we create a Last-Modified HTTP header
if(isset($record['LastEdited'])) {
HTTP::register_modification_date($record['LastEdited']);
}
// this must be called before populateDefaults(), as field getters on a DataObject
// may call getComponent() and others, which rely on $this->model being set.
$this->model = $model ? $model : DataModel::inst();
// Must be called after parent constructor
if(!$isSingleton && (!isset($this->record['ID']) || !$this->record['ID'])) {
$this->populateDefaults();
}
// prevent populateDefaults() and setField() from marking overwritten defaults as changed
$this->changed = array();
}
/**
* Set the DataModel
* @param DataModel $model
* @return DataObject $this
*/
public function setDataModel(DataModel $model) {
$this->model = $model;
return $this;
}
/**
* Destroy all of this objects dependant objects and local caches.
* You'll need to call this to get the memory of an object that has components or extensions freed.
*/
public function destroy() {
//$this->destroyed = true;
gc_collect_cycles();
$this->flushCache(false);
}
/**
* Create a duplicate of this node.
* Note: now also duplicates relations.
*
* @param bool $doWrite Perform a write() operation before returning the object.
* If this is true, it will create the duplicate in the database.
* @return DataObject A duplicate of this node. The exact type will be the type of this node.
*/
public function duplicate($doWrite = true) {
$className = $this->class;
$clone = new $className( $this->toMap(), false, $this->model );
$clone->ID = 0;
$clone->invokeWithExtensions('onBeforeDuplicate', $this, $doWrite);
if($doWrite) {
$clone->write();
$this->duplicateManyManyRelations($this, $clone);
}
$clone->invokeWithExtensions('onAfterDuplicate', $this, $doWrite);
return $clone;
}
/**
* Copies the many_many and belongs_many_many relations from one object to another instance of the name of object
* The destinationObject must be written to the database already and have an ID. Writing is performed
* automatically when adding the new relations.
*
* @param DataObject $sourceObject the source object to duplicate from
* @param DataObject $destinationObject the destination object to populate with the duplicated relations
* @return DataObject with the new many_many relations copied in
*/
protected function duplicateManyManyRelations($sourceObject, $destinationObject) {
if (!$destinationObject || $destinationObject->ID < 1) {
user_error("Can't duplicate relations for an object that has not been written to the database",
E_USER_ERROR);
}
//duplicate complex relations
// DO NOT copy has_many relations, because copying the relation would result in us changing the has_one
// relation on the other side of this relation to point at the copy and no longer the original (being a
// has_one, it can only point at one thing at a time). So, all relations except has_many can and are copied
if ($sourceObject->hasOne()) foreach($sourceObject->hasOne() as $name => $type) {
$this->duplicateRelations($sourceObject, $destinationObject, $name);
}
if ($sourceObject->manyMany()) foreach($sourceObject->manyMany() as $name => $type) {
//many_many include belongs_many_many
$this->duplicateRelations($sourceObject, $destinationObject, $name);
}
return $destinationObject;
}
/**
* Helper function to duplicate relations from one object to another
* @param $sourceObject the source object to duplicate from
* @param $destinationObject the destination object to populate with the duplicated relations
* @param $name the name of the relation to duplicate (e.g. members)
*/
private function duplicateRelations($sourceObject, $destinationObject, $name) {
$relations = $sourceObject->$name();
if ($relations) {
if ($relations instanceOf RelationList) { //many-to-something relation
if ($relations->Count() > 0) { //with more than one thing it is related to
foreach($relations as $relation) {
$destinationObject->$name()->add($relation);
}
}
} else { //one-to-one relation
$destinationObject->{"{$name}ID"} = $relations->ID;
}
}
}
public function getObsoleteClassName() {
$className = $this->getField("ClassName");
if (!ClassInfo::exists($className)) return $className;
}
public function getClassName() {
$className = $this->getField("ClassName");
if (!ClassInfo::exists($className)) return get_class($this);
return $className;
}
/**
* Set the ClassName attribute. {@link $class} is also updated.
* Warning: This will produce an inconsistent record, as the object
* instance will not automatically switch to the new subclass.
* Please use {@link newClassInstance()} for this purpose,
* or destroy and reinstanciate the record.
*
* @param string $className The new ClassName attribute (a subclass of {@link DataObject})
* @return DataObject $this
*/
public function setClassName($className) {
$className = trim($className);
if(!$className || !is_subclass_of($className, 'DataObject')) return;
$this->class = $className;
$this->setField("ClassName", $className);
return $this;
}
/**
* Create a new instance of a different class from this object's record.
* This is useful when dynamically changing the type of an instance. Specifically,
* it ensures that the instance of the class is a match for the className of the
* record. Don't set the {@link DataObject->class} or {@link DataObject->ClassName}
* property manually before calling this method, as it will confuse change detection.
*
* If the new class is different to the original class, defaults are populated again
* because this will only occur automatically on instantiation of a DataObject if
* there is no record, or the record has no ID. In this case, we do have an ID but
* we still need to repopulate the defaults.
*
* @param string $newClassName The name of the new class
*
* @return DataObject The new instance of the new class, The exact type will be of the class name provided.
*/
public function newClassInstance($newClassName) {
$originalClass = $this->ClassName;
$newInstance = new $newClassName(array_merge(
$this->record,
array(
'ClassName' => $originalClass,
'RecordClassName' => $originalClass,
)
), false, $this->model);
if($newClassName != $originalClass) {
$newInstance->setClassName($newClassName);
$newInstance->populateDefaults();
$newInstance->forceChange();
}
return $newInstance;
}
/**
* Adds methods from the extensions.
* Called by Object::__construct() once per class.
*/
public function defineMethods() {
parent::defineMethods();
// Define the extra db fields - this is only necessary for extensions added in the
// class definition. Object::add_extension() will call this at definition time for
// those objects, which is a better mechanism. Perhaps extensions defined inside the
// class def can somehow be applied at definiton time also?
if($this->extension_instances) foreach($this->extension_instances as $i => $instance) {
if(!$instance->class) {
$class = get_class($instance);
user_error("DataObject::defineMethods(): Please ensure {$class}::__construct() calls"
. " parent::__construct()", E_USER_ERROR);
}
}
if($this->class == 'DataObject') return;
// Set up accessors for joined items
if($manyMany = $this->manyMany()) {
foreach($manyMany as $relationship => $class) {
$this->addWrapperMethod($relationship, 'getManyManyComponents');
}
}
if($hasMany = $this->hasMany()) {
foreach($hasMany as $relationship => $class) {
$this->addWrapperMethod($relationship, 'getComponents');
}
}
if($hasOne = $this->hasOne()) {
foreach($hasOne as $relationship => $class) {
$this->addWrapperMethod($relationship, 'getComponent');
}
}
if($belongsTo = $this->belongsTo()) foreach(array_keys($belongsTo) as $relationship) {
$this->addWrapperMethod($relationship, 'getComponent');
}
}
/**
* Returns true if this object "exists", i.e., has a sensible value.
* The default behaviour for a DataObject is to return true if
* the object exists in the database, you can override this in subclasses.
*
* @return boolean true if this object exists
*/
public function exists() {
return (isset($this->record['ID']) && $this->record['ID'] > 0);
}
/**
* Returns TRUE if all values (other than "ID") are
* considered empty (by weak boolean comparison).
*
* @return boolean
*/
public function isEmpty() {
$fixed = $this->config()->fixed_fields;
foreach($this->toMap() as $field => $value){
// only look at custom fields
if(isset($fixed[$field])) {
continue;
}
$dbObject = $this->dbObject($field);
if(!$dbObject) {
continue;
}
if($dbObject->exists()) {
return false;
}
}
return true;
}
/**
* Get the user friendly singular name of this DataObject.
* If the name is not defined (by redefining $singular_name in the subclass),
* this returns the class name.
*
* @return string User friendly singular name of this DataObject
*/
public function singular_name() {
if(!$name = $this->stat('singular_name')) {
$name = ucwords(trim(strtolower(preg_replace('/_?([A-Z])/', ' $1', $this->class))));
}
return $name;
}
/**
* Get the translated user friendly singular name of this DataObject
* same as singular_name() but runs it through the translating function
*
* Translating string is in the form:
* $this->class.SINGULARNAME
* Example:
* Page.SINGULARNAME
*
* @return string User friendly translated singular name of this DataObject
*/
public function i18n_singular_name() {
return _t($this->class.'.SINGULARNAME', $this->singular_name());
}
/**
* Get the user friendly plural name of this DataObject
* If the name is not defined (by renaming $plural_name in the subclass),
* this returns a pluralised version of the class name.
*
* @return string User friendly plural name of this DataObject
*/
public function plural_name() {
if($name = $this->stat('plural_name')) {
return $name;
} else {
$name = $this->singular_name();
//if the penultimate character is not a vowel, replace "y" with "ies"
if (preg_match('/[^aeiou]y$/i', $name)) {
$name = substr($name,0,-1) . 'ie';
}
return ucfirst($name . 's');
}
}
/**
* Get the translated user friendly plural name of this DataObject
* Same as plural_name but runs it through the translation function
* Translation string is in the form:
* $this->class.PLURALNAME
* Example:
* Page.PLURALNAME
*
* @return string User friendly translated plural name of this DataObject
*/
public function i18n_plural_name()
{
$name = $this->plural_name();
return _t($this->class.'.PLURALNAME', $name);
}
/**
* Standard implementation of a title/label for a specific
* record. Tries to find properties 'Title' or 'Name',
* and falls back to the 'ID'. Useful to provide
* user-friendly identification of a record, e.g. in errormessages
* or UI-selections.
*
* Overload this method to have a more specialized implementation,
* e.g. for an Address record this could be:
*
* function getTitle() {
* return "{$this->StreetNumber} {$this->StreetName} {$this->City}";
* }
*
*
* @return string
*/
public function getTitle() {
if($this->hasDatabaseField('Title')) return $this->getField('Title');
if($this->hasDatabaseField('Name')) return $this->getField('Name');
return "#{$this->ID}";
}
/**
* Returns the associated database record - in this case, the object itself.
* This is included so that you can call $dataOrController->data() and get a DataObject all the time.
*
* @return DataObject Associated database record
*/
public function data() {
return $this;
}
/**
* Convert this object to a map.
*
* @return array The data as a map.
*/
public function toMap() {
$this->loadLazyFields();
return $this->record;
}
/**
* Return all currently fetched database fields.
*
* This function is similar to toMap() but doesn't trigger the lazy-loading of all unfetched fields.
* Obviously, this makes it a lot faster.
*
* @return array The data as a map.
*/
public function getQueriedDatabaseFields() {
return $this->record;
}
/**
* Update a number of fields on this object, given a map of the desired changes.
*
* The field names can be simple names, or you can use a dot syntax to access $has_one relations.
* For example, array("Author.FirstName" => "Jim") will set $this->Author()->FirstName to "Jim".
*
* update() doesn't write the main object, but if you use the dot syntax, it will write()
* the related objects that it alters.
*
* @param array $data A map of field name to data values to update.
* @return DataObject $this
*/
public function update($data) {
foreach($data as $k => $v) {
// Implement dot syntax for updates
if(strpos($k,'.') !== false) {
$relations = explode('.', $k);
$fieldName = array_pop($relations);
$relObj = $this;
foreach($relations as $i=>$relation) {
// no support for has_many or many_many relationships,
// as the updater wouldn't know which object to write to (or create)
if($relObj->$relation() instanceof DataObject) {
$parentObj = $relObj;
$relObj = $relObj->$relation();
// If the intermediate relationship objects have been created, then write them
if($iID || (!$relObj->ID && $parentObj != $this)) {
$relObj->write();
$relatedFieldName = $relation."ID";
$parentObj->$relatedFieldName = $relObj->ID;
$parentObj->write();
}
} else {
user_error(
"DataObject::update(): Can't traverse relationship '$relation'," .
"it has to be a has_one relationship or return a single DataObject",
E_USER_NOTICE
);
// unset relation object so we don't write properties to the wrong object
unset($relObj);
break;
}
}
if($relObj) {
$relObj->$fieldName = $v;
$relObj->write();
$relatedFieldName = $relation."ID";
$this->$relatedFieldName = $relObj->ID;
$relObj->flushCache();
} else {
user_error("Couldn't follow dot syntax '$k' on '$this->class' object", E_USER_WARNING);
}
} else {
$this->$k = $v;
}
}
return $this;
}
/**
* Pass changes as a map, and try to
* get automatic casting for these fields.
* Doesn't write to the database. To write the data,
* use the write() method.
*
* @param array $data A map of field name to data values to update.
* @return DataObject $this
*/
public function castedUpdate($data) {
foreach($data as $k => $v) {
$this->setCastedField($k,$v);
}
return $this;
}
/**
* Merges data and relations from another object of same class,
* without conflict resolution. Allows to specify which
* dataset takes priority in case its not empty.
* has_one-relations are just transferred with priority 'right'.
* has_many and many_many-relations are added regardless of priority.
*
* Caution: has_many/many_many relations are moved rather than duplicated,
* meaning they are not connected to the merged object any longer.
* Caution: Just saves updated has_many/many_many relations to the database,
* doesn't write the updated object itself (just writes the object-properties).
* Caution: Does not delete the merged object.
* Caution: Does now overwrite Created date on the original object.
*
* @param $obj DataObject
* @param $priority String left|right Determines who wins in case of a conflict (optional)
* @param $includeRelations Boolean Merge any existing relations (optional)
* @param $overwriteWithEmpty Boolean Overwrite existing left values with empty right values.
* Only applicable with $priority='right'. (optional)
* @return Boolean
*/
public function merge($rightObj, $priority = 'right', $includeRelations = true, $overwriteWithEmpty = false) {
$leftObj = $this;
if($leftObj->ClassName != $rightObj->ClassName) {
// we can't merge similiar subclasses because they might have additional relations
user_error("DataObject->merge(): Invalid object class '{$rightObj->ClassName}'
(expected '{$leftObj->ClassName}').", E_USER_WARNING);
return false;
}
if(!$rightObj->ID) {
user_error("DataObject->merge(): Please write your merged-in object to the database before merging,
to make sure all relations are transferred properly.').", E_USER_WARNING);
return false;
}
// makes sure we don't merge data like ID or ClassName
$leftData = $leftObj->db();
$rightData = $rightObj->db();
foreach($rightData as $key=>$rightSpec) {
// Don't merge ID
if($key === 'ID') {
continue;
}
// Only merge relations if allowed
if($rightSpec === 'ForeignKey' && !$includeRelations) {
continue;
}
// don't merge conflicting values if priority is 'left'
if($priority == 'left' && $leftObj->{$key} !== $rightObj->{$key}) {
continue;
}
// don't overwrite existing left values with empty right values (if $overwriteWithEmpty is set)
if($priority == 'right' && !$overwriteWithEmpty && empty($rightObj->{$key})) {
continue;
}
// TODO remove redundant merge of has_one fields
$leftObj->{$key} = $rightObj->{$key};
}
// merge relations
if($includeRelations) {
if($manyMany = $this->manyMany()) {
foreach($manyMany as $relationship => $class) {
$leftComponents = $leftObj->getManyManyComponents($relationship);
$rightComponents = $rightObj->getManyManyComponents($relationship);
if($rightComponents && $rightComponents->exists()) {
$leftComponents->addMany($rightComponents->column('ID'));
}
$leftComponents->write();
}
}
if($hasMany = $this->hasMany()) {
foreach($hasMany as $relationship => $class) {
$leftComponents = $leftObj->getComponents($relationship);
$rightComponents = $rightObj->getComponents($relationship);
if($rightComponents && $rightComponents->exists()) {
$leftComponents->addMany($rightComponents->column('ID'));
}
$leftComponents->write();
}
}
}
return true;
}
/**
* Forces the record to think that all its data has changed.
* Doesn't write to the database. Only sets fields as changed
* if they are not already marked as changed.
*
* @return DataObject $this
*/
public function forceChange() {
// Ensure lazy fields loaded
$this->loadLazyFields();
// $this->record might not contain the blank values so we loop on $this->inheritedDatabaseFields() as well
$fieldNames = array_unique(array_merge(
array_keys($this->record),
array_keys($this->db())
));
foreach($fieldNames as $fieldName) {
if(!isset($this->changed[$fieldName])) $this->changed[$fieldName] = self::CHANGE_STRICT;
// Populate the null values in record so that they actually get written
if(!isset($this->record[$fieldName])) $this->record[$fieldName] = null;
}
// @todo Find better way to allow versioned to write a new version after forceChange
if($this->isChanged('Version')) unset($this->changed['Version']);
return $this;
}
/**
* Validate the current object.
*
* By default, there is no validation - objects are always valid! However, you can overload this method in your
* DataObject sub-classes to specify custom validation, or use the hook through DataExtension.
*
* Invalid objects won't be able to be written - a warning will be thrown and no write will occur. onBeforeWrite()
* and onAfterWrite() won't get called either.
*
* It is expected that you call validate() in your own application to test that an object is valid before
* attempting a write, and respond appropriately if it isn't.
*
* @see {@link ValidationResult}
* @return ValidationResult
*/
public function validate() {
$result = ValidationResult::create();
$this->extend('validate', $result);
return $result;
}
/**
* Public accessor for {@see DataObject::validate()}
*
* @return ValidationResult
*/
public function doValidate() {
Deprecation::notice('5.0', 'Use validate');
return $this->validate();
}
/**
* Event handler called before writing to the database.
* You can overload this to clean up or otherwise process data before writing it to the
* database. Don't forget to call parent::onBeforeWrite(), though!
*
* This called after {@link $this->validate()}, so you can be sure that your data is valid.
*
* @uses DataExtension->onBeforeWrite()
*/
protected function onBeforeWrite() {
$this->brokenOnWrite = false;
$dummy = null;
$this->extend('onBeforeWrite', $dummy);
}
/**
* Event handler called after writing to the database.
* You can overload this to act upon changes made to the data after it is written.
* $this->changed will have a record
* database. Don't forget to call parent::onAfterWrite(), though!
*
* @uses DataExtension->onAfterWrite()
*/
protected function onAfterWrite() {
$dummy = null;
$this->extend('onAfterWrite', $dummy);
}
/**
* Event handler called before deleting from the database.
* You can overload this to clean up or otherwise process data before delete this
* record. Don't forget to call parent::onBeforeDelete(), though!
*
* @uses DataExtension->onBeforeDelete()
*/
protected function onBeforeDelete() {
$this->brokenOnDelete = false;
$dummy = null;
$this->extend('onBeforeDelete', $dummy);
}
protected function onAfterDelete() {
$this->extend('onAfterDelete');
}
/**
* Load the default values in from the self::$defaults array.
* Will traverse the defaults of the current class and all its parent classes.
* Called by the constructor when creating new records.
*
* @uses DataExtension->populateDefaults()
* @return DataObject $this
*/
public function populateDefaults() {
$classes = array_reverse(ClassInfo::ancestry($this));
foreach($classes as $class) {
$defaults = Config::inst()->get($class, 'defaults', Config::UNINHERITED);
if($defaults && !is_array($defaults)) {
user_error("Bad '$this->class' defaults given: " . var_export($defaults, true),
E_USER_WARNING);
$defaults = null;
}
if($defaults) foreach($defaults as $fieldName => $fieldValue) {
// SRM 2007-03-06: Stricter check
if(!isset($this->$fieldName) || $this->$fieldName === null) {
$this->$fieldName = $fieldValue;
}
// Set many-many defaults with an array of ids
if(is_array($fieldValue) && $this->manyManyComponent($fieldName)) {
$manyManyJoin = $this->$fieldName();
$manyManyJoin->setByIdList($fieldValue);
}
}
if($class == 'DataObject') {
break;
}
}
$this->extend('populateDefaults');
return $this;
}
/**
* Determine validation of this object prior to write
*
* @return ValidationException Exception generated by this write, or null if valid
*/
protected function validateWrite() {
if ($this->ObsoleteClassName) {
return new ValidationException(
"Object is of class '{$this->ObsoleteClassName}' which doesn't exist - ".
"you need to change the ClassName before you can write it",
E_USER_WARNING
);
}
if(Config::inst()->get('DataObject', 'validation_enabled')) {
$result = $this->validate();
if (!$result->valid()) {
return new ValidationException(
$result,
$result->message(),
E_USER_WARNING
);
}
}
}
/**
* Prepare an object prior to write
*
* @throws ValidationException
*/
protected function preWrite() {
// Validate this object
if($writeException = $this->validateWrite()) {
// Used by DODs to clean up after themselves, eg, Versioned
$this->invokeWithExtensions('onAfterSkippedWrite');
throw $writeException;
}
// Check onBeforeWrite
$this->brokenOnWrite = true;
$this->onBeforeWrite();
if($this->brokenOnWrite) {
user_error("$this->class has a broken onBeforeWrite() function."
. " Make sure that you call parent::onBeforeWrite().", E_USER_ERROR);
}
}
/**
* Detects and updates all changes made to this object
*
* @param bool $forceChanges If set to true, force all fields to be treated as changed
* @return bool True if any changes are detected
*/
protected function updateChanges($forceChanges = false) {
// Update the changed array with references to changed obj-fields
foreach($this->record as $field => $value) {
// Only mark ID as changed if $forceChanges
if($field === 'ID' && !$forceChanges) continue;
// Determine if this field should be forced, or can mark itself, changed
if($forceChanges
|| !$this->isInDB()
|| (is_object($value) && method_exists($value, 'isChanged') && $value->isChanged())
) {
$this->changed[$field] = self::CHANGE_VALUE;
}
}
// Check changes exist, abort if there are no changes
return $this->changed && (bool)array_filter($this->changed);
}
/**
* Writes a subset of changes for a specific table to the given manipulation
*
* @param string $baseTable Base table
* @param string $now Timestamp to use for the current time
* @param bool $isNewRecord Whether this should be treated as a new record write
* @param array $manipulation Manipulation to write to
* @param string $class Table and Class to select and write to
*/
protected function prepareManipulationTable($baseTable, $now, $isNewRecord, &$manipulation, $class) {
$manipulation[$class] = array();
// Extract records for this table
foreach($this->record as $fieldName => $fieldValue) {
// Check if this record pertains to this table, and
// we're not attempting to reset the BaseTable->ID
if( empty($this->changed[$fieldName])
|| ($class === $baseTable && $fieldName === 'ID')
|| (!self::has_own_table_database_field($class, $fieldName)
&& !self::is_composite_field($class, $fieldName, false))
) {
continue;
}
// if database column doesn't correlate to a DBField instance...
$fieldObj = $this->dbObject($fieldName);
if(!$fieldObj) {
$fieldObj = DBField::create_field('Varchar', $fieldValue, $fieldName);
}
// Write to manipulation
$fieldObj->writeToManipulation($manipulation[$class]);
}
// Ensure update of Created and LastEdited columns
if($baseTable === $class) {
$manipulation[$class]['fields']['LastEdited'] = $now;
if($isNewRecord) {
$manipulation[$class]['fields']['Created']
= empty($this->record['Created'])
? $now
: $this->record['Created'];
$manipulation[$class]['fields']['ClassName'] = $this->class;
}
}
// Inserts done one the base table are performed in another step, so the manipulation should instead
// attempt an update, as though it were a normal update.
$manipulation[$class]['command'] = $isNewRecord ? 'insert' : 'update';
$manipulation[$class]['id'] = $this->record['ID'];
}
/**
* Ensures that a blank base record exists with the basic fixed fields for this dataobject
*
* Does nothing if an ID is already assigned for this record
*
* @param string $baseTable Base table
* @param string $now Timestamp to use for the current time
*/
protected function writeBaseRecord($baseTable, $now) {
// Generate new ID if not specified
if($this->isInDB()) return;
// Perform an insert on the base table
$insert = new SQLInsert('"'.$baseTable.'"');
$insert
->assign('"Created"', $now)
->execute();
$this->changed['ID'] = self::CHANGE_VALUE;
$this->record['ID'] = DB::get_generated_id($baseTable);
}
/**
* Generate and write the database manipulation for all changed fields
*
* @param string $baseTable Base table
* @param string $now Timestamp to use for the current time
* @param bool $isNewRecord If this is a new record
*/
protected function writeManipulation($baseTable, $now, $isNewRecord) {
// Generate database manipulations for each class
$manipulation = array();
foreach($this->getClassAncestry() as $class) {
if(self::has_own_table($class)) {
$this->prepareManipulationTable($baseTable, $now, $isNewRecord, $manipulation, $class);
}
}
// Allow extensions to extend this manipulation
$this->extend('augmentWrite', $manipulation);
// New records have their insert into the base data table done first, so that they can pass the
// generated ID on to the rest of the manipulation
if($isNewRecord) {
$manipulation[$baseTable]['command'] = 'update';
}
// Perform the manipulation
DB::manipulate($manipulation);
}
/**
* Writes all changes to this object to the database.
* - It will insert a record whenever ID isn't set, otherwise update.
* - All relevant tables will be updated.
* - $this->onBeforeWrite() gets called beforehand.
* - Extensions such as Versioned will ammend the database-write to ensure that a version is saved.
*
* @uses DataExtension->augmentWrite()
*
* @param boolean $showDebug Show debugging information
* @param boolean $forceInsert Run INSERT command rather than UPDATE, even if record already exists
* @param boolean $forceWrite Write to database even if there are no changes
* @param boolean $writeComponents Call write() on all associated component instances which were previously
* retrieved through {@link getComponent()}, {@link getComponents()} or
* {@link getManyManyComponents()} (Default: false)
* @return int The ID of the record
* @throws ValidationException Exception that can be caught and handled by the calling function
*/
public function write($showDebug = false, $forceInsert = false, $forceWrite = false, $writeComponents = false) {
$now = DBDatetime::now()->Rfc2822();
// Execute pre-write tasks
$this->preWrite();
// Check if we are doing an update or an insert
$isNewRecord = !$this->isInDB() || $forceInsert;
// Check changes exist, abort if there are none
$hasChanges = $this->updateChanges($forceInsert);
if($hasChanges || $forceWrite || $isNewRecord) {
// New records have their insert into the base data table done first, so that they can pass the
// generated primary key on to the rest of the manipulation
$baseTable = ClassInfo::baseDataClass($this->class);
$this->writeBaseRecord($baseTable, $now);
// Write the DB manipulation for all changed fields
$this->writeManipulation($baseTable, $now, $isNewRecord);
// If there's any relations that couldn't be saved before, save them now (we have an ID here)
$this->writeRelations();
$this->onAfterWrite();
$this->changed = array();
} else {
if($showDebug) Debug::message("no changes for DataObject");
// Used by DODs to clean up after themselves, eg, Versioned
$this->invokeWithExtensions('onAfterSkippedWrite');
}
// Ensure Created and LastEdited are populated
if(!isset($this->record['Created'])) {
$this->record['Created'] = $now;
}
$this->record['LastEdited'] = $now;
// Write relations as necessary
if($writeComponents) $this->writeComponents(true);
// Clears the cache for this object so get_one returns the correct object.
$this->flushCache();
return $this->record['ID'];
}
/**
* Writes cached relation lists to the database, if possible
*/
public function writeRelations() {
if(!$this->isInDB()) return;
// If there's any relations that couldn't be saved before, save them now (we have an ID here)
if($this->unsavedRelations) {
foreach($this->unsavedRelations as $name => $list) {
$list->changeToList($this->$name());
}
$this->unsavedRelations = array();
}
}
/**
* Write the cached components to the database. Cached components could refer to two different instances of the
* same record.
*
* @param $recursive Recursively write components
* @return DataObject $this
*/
public function writeComponents($recursive = false) {
if(!$this->components) return $this;
foreach($this->components as $component) {
$component->write(false, false, false, $recursive);
}
return $this;
}
/**
* Delete this data object.
* $this->onBeforeDelete() gets called.
* Note that in Versioned objects, both Stage and Live will be deleted.
* @uses DataExtension->augmentSQL()
*/
public function delete() {
$this->brokenOnDelete = true;
$this->onBeforeDelete();
if($this->brokenOnDelete) {
user_error("$this->class has a broken onBeforeDelete() function."
. " Make sure that you call parent::onBeforeDelete().", E_USER_ERROR);
}
// Deleting a record without an ID shouldn't do anything
if(!$this->ID) throw new LogicException("DataObject::delete() called on a DataObject without an ID");
// TODO: This is quite ugly. To improve:
// - move the details of the delete code in the DataQuery system
// - update the code to just delete the base table, and rely on cascading deletes in the DB to do the rest
// obviously, that means getting requireTable() to configure cascading deletes ;-)
$srcQuery = DataList::create($this->class, $this->model)->where("ID = $this->ID")->dataQuery()->query();
foreach($srcQuery->queriedTables() as $table) {
$delete = new SQLDelete("\"$table\"", array('"ID"' => $this->ID));
$delete->execute();
}
// Remove this item out of any caches
$this->flushCache();
$this->onAfterDelete();
$this->OldID = $this->ID;
$this->ID = 0;
}
/**
* Delete the record with the given ID.
*
* @param string $className The class name of the record to be deleted
* @param int $id ID of record to be deleted
*/
public static function delete_by_id($className, $id) {
$obj = DataObject::get_by_id($className, $id);
if($obj) {
$obj->delete();
} else {
user_error("$className object #$id wasn't found when calling DataObject::delete_by_id", E_USER_WARNING);
}
}
/**
* Get the class ancestry, including the current class name.
* The ancestry will be returned as an array of class names, where the 0th element
* will be the class that inherits directly from DataObject, and the last element
* will be the current class.
*
* @return array Class ancestry
*/
public function getClassAncestry() {
if(!isset(self::$_cache_get_class_ancestry[$this->class])) {
self::$_cache_get_class_ancestry[$this->class] = array($this->class);
while(($class=get_parent_class(self::$_cache_get_class_ancestry[$this->class][0])) != "DataObject") {
array_unshift(self::$_cache_get_class_ancestry[$this->class], $class);
}
}
return self::$_cache_get_class_ancestry[$this->class];
}
/**
* Return a component object from a one to one relationship, as a DataObject.
* If no component is available, an 'empty component' will be returned for
* non-polymorphic relations, or for polymorphic relations with a class set.
*
* @param string $componentName Name of the component
* @return DataObject The component object. It's exact type will be that of the component.
* @throws Exception
*/
public function getComponent($componentName) {
if(isset($this->components[$componentName])) {
return $this->components[$componentName];
}
if($class = $this->hasOneComponent($componentName)) {
$joinField = $componentName . 'ID';
$joinID = $this->getField($joinField);
// Extract class name for polymorphic relations
if($class === 'DataObject') {
$class = $this->getField($componentName . 'Class');
if(empty($class)) return null;
}
if($joinID) {
// Ensure that the selected object originates from the same stage, subsite, etc
$component = DataObject::get($class)
->filter('ID', $joinID)
->setDataQueryParam($this->getInheritableQueryParams())
->first();
}
if(empty($component)) {
$component = $this->model->$class->newObject();
}
} elseif($class = $this->belongsToComponent($componentName)) {
$joinField = $this->getRemoteJoinField($componentName, 'belongs_to', $polymorphic);
$joinID = $this->ID;
if($joinID) {
// Prepare filter for appropriate join type
if($polymorphic) {
$filter = array(
"{$joinField}ID" => $joinID,
"{$joinField}Class" => $this->class
);
} else {
$filter = array(
$joinField => $joinID
);
}
// Ensure that the selected object originates from the same stage, subsite, etc
$component = DataObject::get($class)
->filter($filter)
->setDataQueryParam($this->getInheritableQueryParams())
->first();
}
if(empty($component)) {
$component = $this->model->$class->newObject();
if($polymorphic) {
$component->{$joinField.'ID'} = $this->ID;
$component->{$joinField.'Class'} = $this->class;
} else {
$component->$joinField = $this->ID;
}
}
} else {
throw new InvalidArgumentException(
"DataObject->getComponent(): Could not find component '$componentName'."
);
}
$this->components[$componentName] = $component;
return $component;
}
/**
* Returns a one-to-many relation as a HasManyList
*
* @param string $componentName Name of the component
* @return HasManyList The components of the one-to-many relationship.
*/
public function getComponents($componentName) {
$result = null;
$componentClass = $this->hasManyComponent($componentName);
if(!$componentClass) {
throw new InvalidArgumentException(sprintf(
"DataObject::getComponents(): Unknown 1-to-many component '%s' on class '%s'",
$componentName,
$this->class
));
}
// If we haven't been written yet, we can't save these relations, so use a list that handles this case
if(!$this->ID) {
if(!isset($this->unsavedRelations[$componentName])) {
$this->unsavedRelations[$componentName] =
new UnsavedRelationList($this->class, $componentName, $componentClass);
}
return $this->unsavedRelations[$componentName];
}
// Determine type and nature of foreign relation
$joinField = $this->getRemoteJoinField($componentName, 'has_many', $polymorphic);
/** @var HasManyList $result */
if($polymorphic) {
$result = PolymorphicHasManyList::create($componentClass, $joinField, $this->class);
} else {
$result = HasManyList::create($componentClass, $joinField);
}
if($this->model) {
$result->setDataModel($this->model);
}
return $result
->setDataQueryParam($this->getInheritableQueryParams())
->forForeignID($this->ID);
}
/**
* Find the foreign class of a relation on this DataObject, regardless of the relation type.
*
* @param string $relationName Relation name.
* @return string Class name, or null if not found.
*/
public function getRelationClass($relationName) {
// Go through all relationship configuration fields.
$candidates = array_merge(
($relations = Config::inst()->get($this->class, 'has_one')) ? $relations : array(),
($relations = Config::inst()->get($this->class, 'has_many')) ? $relations : array(),
($relations = Config::inst()->get($this->class, 'many_many')) ? $relations : array(),
($relations = Config::inst()->get($this->class, 'belongs_many_many')) ? $relations : array(),
($relations = Config::inst()->get($this->class, 'belongs_to')) ? $relations : array()
);
if (isset($candidates[$relationName])) {
$remoteClass = $candidates[$relationName];
// If dot notation is present, extract just the first part that contains the class.
if(($fieldPos = strpos($remoteClass, '.'))!==false) {
return substr($remoteClass, 0, $fieldPos);
}
// Otherwise just return the class
return $remoteClass;
}
return null;
}
/**
* Given a relation name, determine the relation type
*
* @param string $component Name of component
* @return string has_one, has_many, many_many, belongs_many_many or belongs_to
*/
public function getRelationType($component) {
$types = array('has_one', 'has_many', 'many_many', 'belongs_many_many', 'belongs_to');
foreach($types as $type) {
$relations = Config::inst()->get($this->class, $type);
if($relations && isset($relations[$component])) {
return $type;
}
}
return null;
}
/**
* Given a relation declared on a remote class, generate a substitute component for the opposite
* side of the relation.
*
* Notes on behaviour:
* - This can still be used on components that are defined on both sides, but do not need to be.
* - All has_ones on remote class will be treated as local has_many, even if they are belongs_to
* - Cannot be used on polymorphic relationships
* - Cannot be used on unsaved objects.
*
* @param string $remoteClass
* @param string $remoteRelation
* @return DataList|DataObject The component, either as a list or single object
* @throws BadMethodCallException
* @throws InvalidArgumentException
*/
public function inferReciprocalComponent($remoteClass, $remoteRelation) {
/** @var DataObject $remote */
$remote = $remoteClass::singleton();
$class = $remote->getRelationClass($remoteRelation);
// Validate arguments
if(!$this->isInDB()) {
throw new BadMethodCallException(__METHOD__ . " cannot be called on unsaved objects");
}
if(empty($class)) {
throw new InvalidArgumentException(sprintf(
"%s invoked with invalid relation %s.%s",
__METHOD__,
$remoteClass,
$remoteRelation
));
}
if($class === 'DataObject') {
throw new InvalidArgumentException(sprintf(
"%s cannot generate opposite component of relation %s.%s as it is polymorphic. " .
"This method does not support polymorphic relationships",
__METHOD__,
$remoteClass,
$remoteRelation
));
}
if(!is_a($this, $class, true)) {
throw new InvalidArgumentException(sprintf(
"Relation %s on %s does not refer to objects of type %s",
$remoteRelation, $remoteClass, get_class($this)
));
}
// Check the relation type to mock
$relationType = $remote->getRelationType($remoteRelation);
switch($relationType) {
case 'has_one': {
// Mock has_many
$joinField = "{$remoteRelation}ID";
$componentClass = ClassInfo::table_for_object_field($remoteClass, $joinField);
$result = HasManyList::create($componentClass, $joinField);
if ($this->model) {
$result->setDataModel($this->model);
}
return $result
->setDataQueryParam($this->getInheritableQueryParams())
->forForeignID($this->ID);
}
case 'belongs_to':
case 'has_many': {
// These relations must have a has_one on the other end, so find it
$joinField = $remote->getRemoteJoinField($remoteRelation, $relationType, $polymorphic);
if ($polymorphic) {
throw new InvalidArgumentException(sprintf(
"%s cannot generate opposite component of relation %s.%s, as the other end appears" .
"to be a has_one polymorphic. This method does not support polymorphic relationships",
__METHOD__,
$remoteClass,
$remoteRelation
));
}
$joinID = $this->getField($joinField);
if (empty($joinID)) {
return null;
}
// Get object by joined ID
return DataObject::get($remoteClass)
->filter('ID', $joinID)
->setDataQueryParam($this->getInheritableQueryParams())
->first();
}
case 'many_many':
case 'belongs_many_many': {
// Get components and extra fields from parent
list($componentClass, $parentClass, $componentField, $parentField, $table)
= $remote->manyManyComponent($remoteRelation);
$extraFields = $remote->manyManyExtraFieldsForComponent($remoteRelation) ?: array();
// Reverse parent and component fields and create an inverse ManyManyList
/** @var ManyManyList $result */
$result = ManyManyList::create($componentClass, $table, $componentField, $parentField, $extraFields);
if($this->model) {
$result->setDataModel($this->model);
}
$this->extend('updateManyManyComponents', $result);
// If this is called on a singleton, then we return an 'orphaned relation' that can have the
// foreignID set elsewhere.
return $result
->setDataQueryParam($this->getInheritableQueryParams())
->forForeignID($this->ID);
}
default: {
return null;
}
}
}
/**
* Tries to find the database key on another object that is used to store a
* relationship to this class. If no join field can be found it defaults to 'ParentID'.
*
* If the remote field is polymorphic then $polymorphic is set to true, and the return value
* is in the form 'Relation' instead of 'RelationID', referencing the composite DBField.
*
* @param string $component Name of the relation on the current object pointing to the
* remote object.
* @param string $type the join type - either 'has_many' or 'belongs_to'
* @param boolean $polymorphic Flag set to true if the remote join field is polymorphic.
* @return string
* @throws Exception
*/
public function getRemoteJoinField($component, $type = 'has_many', &$polymorphic = false) {
// Extract relation from current object
if($type === 'has_many') {
$remoteClass = $this->hasManyComponent($component, false);
} else {
$remoteClass = $this->belongsToComponent($component, false);
}
if(empty($remoteClass)) {
throw new Exception("Unknown $type component '$component' on class '$this->class'");
}
if(!ClassInfo::exists(strtok($remoteClass, '.'))) {
throw new Exception(
"Class '$remoteClass' not found, but used in $type component '$component' on class '$this->class'"
);
}
// If presented with an explicit field name (using dot notation) then extract field name
$remoteField = null;
if(strpos($remoteClass, '.') !== false) {
list($remoteClass, $remoteField) = explode('.', $remoteClass);
}
// Reference remote has_one to check against
$remoteRelations = Config::inst()->get($remoteClass, 'has_one');
// Without an explicit field name, attempt to match the first remote field
// with the same type as the current class
if(empty($remoteField)) {
// look for remote has_one joins on this class or any parent classes
$remoteRelationsMap = array_flip($remoteRelations);
foreach(array_reverse(ClassInfo::ancestry($this)) as $class) {
if(array_key_exists($class, $remoteRelationsMap)) {
$remoteField = $remoteRelationsMap[$class];
break;
}
}
}
// In case of an indeterminate remote field show an error
if(empty($remoteField)) {
$polymorphic = false;
$message = "No has_one found on class '$remoteClass'";
if($type == 'has_many') {
// include a hint for has_many that is missing a has_one
$message .= ", the has_many relation from '$this->class' to '$remoteClass'";
$message .= " requires a has_one on '$remoteClass'";
}
throw new Exception($message);
}
// If given an explicit field name ensure the related class specifies this
if(empty($remoteRelations[$remoteField])) {
throw new Exception("Missing expected has_one named '$remoteField'
on class '$remoteClass' referenced by $type named '$component'
on class {$this->class}"
);
}
// Inspect resulting found relation
if($remoteRelations[$remoteField] === 'DataObject') {
$polymorphic = true;
return $remoteField; // Composite polymorphic field does not include 'ID' suffix
} else {
$polymorphic = false;
return $remoteField . 'ID';
}
}
/**
* Returns a many-to-many component, as a ManyManyList.
* @param string $componentName Name of the many-many component
* @return ManyManyList The set of components
*/
public function getManyManyComponents($componentName) {
$manyManyComponent = $this->manyManyComponent($componentName);
if(!$manyManyComponent) {
throw new InvalidArgumentException(sprintf(
"DataObject::getComponents(): Unknown many-to-many component '%s' on class '%s'",
$componentName,
$this->class
));
}
list($parentClass, $componentClass, $parentField, $componentField, $table) = $manyManyComponent;
// If we haven't been written yet, we can't save these relations, so use a list that handles this case
if(!$this->ID) {
if(!isset($this->unsavedRelations[$componentName])) {
$this->unsavedRelations[$componentName] =
new UnsavedRelationList($parentClass, $componentName, $componentClass);
}
return $this->unsavedRelations[$componentName];
}
$extraFields = $this->manyManyExtraFieldsForComponent($componentName) ?: array();
/** @var ManyManyList $result */
$result = ManyManyList::create($componentClass, $table, $componentField, $parentField, $extraFields);
if($this->model) {
$result->setDataModel($this->model);
}
$this->extend('updateManyManyComponents', $result);
// If this is called on a singleton, then we return an 'orphaned relation' that can have the
// foreignID set elsewhere.
return $result
->setDataQueryParam($this->getInheritableQueryParams())
->forForeignID($this->ID);
}
/**
* Return the class of a one-to-one component. If $component is null, return all of the one-to-one components and
* their classes. If the selected has_one is a polymorphic field then 'DataObject' will be returned for the type.
*
* @return string|array The class of the one-to-one component, or an array of all one-to-one components and
* their classes.
*/
public function hasOne() {
return (array)Config::inst()->get($this->class, 'has_one', Config::INHERITED);
}
/**
* Return data for a specific has_one component.
* @param string $component
* @return string|null
*/
public function hasOneComponent($component) {
$classes = ClassInfo::ancestry($this, true);
foreach(array_reverse($classes) as $class) {
$hasOnes = Config::inst()->get($class, 'has_one', Config::UNINHERITED);
if(isset($hasOnes[$component])) {
return $hasOnes[$component];
}
}
}
/**
* Returns the class of a remote belongs_to relationship. If no component is specified a map of all components and
* their class name will be returned.
*
* @param string $component - Name of component
* @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have
* the field data stripped off. It defaults to TRUE.
* @return string|array
*/
public function belongsTo($component = null, $classOnly = true) {
if($component) {
Deprecation::notice(
'4.0',
'Please use DataObject::belongsToComponent() instead of passing a component name to belongsTo()',
Deprecation::SCOPE_GLOBAL
);
return $this->belongsToComponent($component, $classOnly);
}
$belongsTo = (array)Config::inst()->get($this->class, 'belongs_to', Config::INHERITED);
if($belongsTo && $classOnly) {
return preg_replace('/(.+)?\..+/', '$1', $belongsTo);
} else {
return $belongsTo ? $belongsTo : array();
}
}
/**
* Return data for a specific belongs_to component.
* @param string $component
* @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have
* the field data stripped off. It defaults to TRUE.
* @return string|null
*/
public function belongsToComponent($component, $classOnly = true) {
$belongsTo = (array)Config::inst()->get($this->class, 'belongs_to', Config::INHERITED);
if($belongsTo && array_key_exists($component, $belongsTo)) {
$belongsTo = $belongsTo[$component];
} else {
return null;
}
return ($classOnly) ? preg_replace('/(.+)?\..+/', '$1', $belongsTo) : $belongsTo;
}
/**
* Return all of the database fields in this object
*
* @param string $fieldName Limit the output to a specific field name
* @param string $includeTable If returning a single column, prefix the column with the table name
* in Table.Column(spec) format
* @return array|string|null The database fields, or if searching a single field, just this one field if found
* Field will be a string in ClassName(args) format, or Table.ClassName(args) format if $includeTable is true
*/
public function db($fieldName = null, $includeTable = false) {
$classes = ClassInfo::ancestry($this, true);
// If we're looking for a specific field, we want to hit subclasses first as they may override field types
if($fieldName) {
$classes = array_reverse($classes);
}
$db = array();
foreach($classes as $class) {
// Merge fields with new fields and composite fields
$fields = self::database_fields($class);
$compositeFields = self::composite_fields($class, false);
$db = array_merge($db, $fields, $compositeFields);
// Check for search field
if($fieldName && isset($db[$fieldName])) {
// Return found field
if(!$includeTable) {
return $db[$fieldName];
}
// Set table for the given field
if(in_array($fieldName, $this->config()->fixed_fields)) {
$table = $this->baseTable();
} else {
$table = $class;
}
return $table . "." . $db[$fieldName];
}
}
// At end of search complete
if($fieldName) {
return null;
} else {
return $db;
}
}
/**
* Gets the class of a one-to-many relationship. If no $component is specified then an array of all the one-to-many
* relationships and their classes will be returned.
*
* @param string $component Deprecated - Name of component
* @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have
* the field data stripped off. It defaults to TRUE.
* @return string|array|false
*/
public function hasMany($component = null, $classOnly = true) {
if($component) {
Deprecation::notice(
'4.0',
'Please use DataObject::hasManyComponent() instead of passing a component name to hasMany()',
Deprecation::SCOPE_GLOBAL
);
return $this->hasManyComponent($component, $classOnly);
}
$hasMany = (array)Config::inst()->get($this->class, 'has_many', Config::INHERITED);
if($hasMany && $classOnly) {
return preg_replace('/(.+)?\..+/', '$1', $hasMany);
} else {
return $hasMany ? $hasMany : array();
}
}
/**
* Return data for a specific has_many component.
* @param string $component
* @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have
* the field data stripped off. It defaults to TRUE.
* @return string|null
*/
public function hasManyComponent($component, $classOnly = true) {
$hasMany = (array)Config::inst()->get($this->class, 'has_many', Config::INHERITED);
if($hasMany && array_key_exists($component, $hasMany)) {
$hasMany = $hasMany[$component];
} else {
return null;
}
return ($classOnly) ? preg_replace('/(.+)?\..+/', '$1', $hasMany) : $hasMany;
}
/**
* Return the many-to-many extra fields specification.
*
* If you don't specify a component name, it returns all
* extra fields for all components available.
*
* @return array|null
*/
public function manyManyExtraFields() {
return Config::inst()->get($this->class, 'many_many_extraFields', Config::INHERITED);
}
/**
* Return the many-to-many extra fields specification for a specific component.
* @param string $component
* @return array|null
*/
public function manyManyExtraFieldsForComponent($component) {
// Get all many_many_extraFields defined in this class or parent classes
$extraFields = (array)Config::inst()->get($this->class, 'many_many_extraFields', Config::INHERITED);
// Extra fields are immediately available
if(isset($extraFields[$component])) {
return $extraFields[$component];
}
// Check this class' belongs_many_manys to see if any of their reverse associations contain extra fields
$manyMany = (array)Config::inst()->get($this->class, 'belongs_many_many', Config::INHERITED);
$candidate = (isset($manyMany[$component])) ? $manyMany[$component] : null;
if($candidate) {
$relationName = null;
// Extract class and relation name from dot-notation
if(strpos($candidate, '.') !== false) {
list($candidate, $relationName) = explode('.', $candidate, 2);
}
// If we've not already found the relation name from dot notation, we need to find a relation that points
// back to this class. As there's no dot-notation, there can only be one relation pointing to this class,
// so it's safe to assume that it's the correct one
if(!$relationName) {
$candidateManyManys = (array)Config::inst()->get($candidate, 'many_many', Config::UNINHERITED);
foreach($candidateManyManys as $relation => $relatedClass) {
if (is_a($this, $relatedClass)) {
$relationName = $relation;
}
}
}
// If we've found a matching relation on the target class, see if we can find extra fields for it
$extraFields = (array)Config::inst()->get($candidate, 'many_many_extraFields', Config::UNINHERITED);
if(isset($extraFields[$relationName])) {
return $extraFields[$relationName];
}
}
return isset($items) ? $items : null;
}
/**
* Return information about a many-to-many component.
* The return value is an array of (parentclass, childclass). If $component is null, then all many-many
* components are returned.
*
* @see DataObject::manyManyComponent()
* @return array|null An array of (parentclass, childclass), or an array of all many-many components
*/
public function manyMany() {
$manyManys = (array)Config::inst()->get($this->class, 'many_many', Config::INHERITED);
$belongsManyManys = (array)Config::inst()->get($this->class, 'belongs_many_many', Config::INHERITED);
$items = array_merge($manyManys, $belongsManyManys);
return $items;
}
/**
* Return information about a specific many_many component. Returns a numeric array of:
* array(
* , The class that relation is defined in e.g. "Product"
* , The target class of the relation e.g. "Category"
* , The field name pointing to 's table e.g. "ProductID"
* , The field name pointing to 's table e.g. "CategoryID"
* The join table between the two classes e.g. "Product_Categories"
* )
* @param string $component The component name
* @return array|null
*/
public function manyManyComponent($component) {
$classes = $this->getClassAncestry();
foreach($classes as $class) {
$manyMany = Config::inst()->get($class, 'many_many', Config::UNINHERITED);
// Check if the component is defined in many_many on this class
$candidate = (isset($manyMany[$component])) ? $manyMany[$component] : null;
if($candidate) {
$parentField = $class . "ID";
$childField = ($class == $candidate) ? "ChildID" : $candidate . "ID";
return array($class, $candidate, $parentField, $childField, "{$class}_$component");
}
// Check if the component is defined in belongs_many_many on this class
$belongsManyMany = Config::inst()->get($class, 'belongs_many_many', Config::UNINHERITED);
$candidate = (isset($belongsManyMany[$component])) ? $belongsManyMany[$component] : null;
if($candidate) {
// Extract class and relation name from dot-notation
if(strpos($candidate, '.') !== false) {
list($candidate, $relationName) = explode('.', $candidate, 2);
}
$childField = $candidate . "ID";
// We need to find the inverse component name
$otherManyMany = Config::inst()->get($candidate, 'many_many', Config::UNINHERITED);
if(!$otherManyMany) {
throw new LogicException("Inverse component of $candidate not found ({$this->class})");
}
// If we've got a relation name (extracted from dot-notation), we can already work out
// the join table and candidate class name...
if(isset($relationName) && isset($otherManyMany[$relationName])) {
$candidateClass = $otherManyMany[$relationName];
$joinTable = "{$candidate}_{$relationName}";
} else {
// ... otherwise, we need to loop over the many_manys and find a relation that
// matches up to this class
foreach($otherManyMany as $inverseComponentName => $candidateClass) {
if($candidateClass == $class || is_subclass_of($class, $candidateClass)) {
$joinTable = "{$candidate}_{$inverseComponentName}";
break;
}
}
}
// If we could work out the join table, we've got all the info we need
if(isset($joinTable)) {
$parentField = ($class == $candidate) ? "ChildID" : $candidateClass . "ID";
return array($class, $candidate, $parentField, $childField, $joinTable);
}
throw new LogicException("Orphaned \$belongs_many_many value for $this->class.$component");
}
}
}
/**
* This returns an array (if it exists) describing the database extensions that are required, or false if none
*
* This is experimental, and is currently only a Postgres-specific enhancement.
*
* @return array or false
*/
public function database_extensions($class){
$extensions = Config::inst()->get($class, 'database_extensions', Config::UNINHERITED);
if($extensions)
return $extensions;
else
return false;
}
/**
* Generates a SearchContext to be used for building and processing
* a generic search form for properties on this object.
*
* @return SearchContext
*/
public function getDefaultSearchContext() {
return new SearchContext(
$this->class,
$this->scaffoldSearchFields(),
$this->defaultSearchFilters()
);
}
/**
* Determine which properties on the DataObject are
* searchable, and map them to their default {@link FormField}
* representations. Used for scaffolding a searchform for {@link ModelAdmin}.
*
* Some additional logic is included for switching field labels, based on
* how generic or specific the field type is.
*
* Used by {@link SearchContext}.
*
* @param array $_params
* 'fieldClasses': Associative array of field names as keys and FormField classes as values
* 'restrictFields': Numeric array of a field name whitelist
* @return FieldList
*/
public function scaffoldSearchFields($_params = null) {
$params = array_merge(
array(
'fieldClasses' => false,
'restrictFields' => false
),
(array)$_params
);
$fields = new FieldList();
foreach($this->searchableFields() as $fieldName => $spec) {
if($params['restrictFields'] && !in_array($fieldName, $params['restrictFields'])) continue;
// If a custom fieldclass is provided as a string, use it
if($params['fieldClasses'] && isset($params['fieldClasses'][$fieldName])) {
$fieldClass = $params['fieldClasses'][$fieldName];
$field = new $fieldClass($fieldName);
// If we explicitly set a field, then construct that
} else if(isset($spec['field'])) {
// If it's a string, use it as a class name and construct
if(is_string($spec['field'])) {
$fieldClass = $spec['field'];
$field = new $fieldClass($fieldName);
// If it's a FormField object, then just use that object directly.
} else if($spec['field'] instanceof FormField) {
$field = $spec['field'];
// Otherwise we have a bug
} else {
user_error("Bad value for searchable_fields, 'field' value: "
. var_export($spec['field'], true), E_USER_WARNING);
}
// Otherwise, use the database field's scaffolder
} else {
$field = $this->relObject($fieldName)->scaffoldSearchField();
}
// Allow fields to opt out of search
if(!$field) {
continue;
}
if (strstr($fieldName, '.')) {
$field->setName(str_replace('.', '__', $fieldName));
}
$field->setTitle($spec['title']);
$fields->push($field);
}
return $fields;
}
/**
* Scaffold a simple edit form for all properties on this dataobject,
* based on default {@link FormField} mapping in {@link DBField::scaffoldFormField()}.
* Field labels/titles will be auto generated from {@link DataObject::fieldLabels()}.
*
* @uses FormScaffolder
*
* @param array $_params Associative array passing through properties to {@link FormScaffolder}.
* @return FieldList
*/
public function scaffoldFormFields($_params = null) {
$params = array_merge(
array(
'tabbed' => false,
'includeRelations' => false,
'restrictFields' => false,
'fieldClasses' => false,
'ajaxSafe' => false
),
(array)$_params
);
$fs = new FormScaffolder($this);
$fs->tabbed = $params['tabbed'];
$fs->includeRelations = $params['includeRelations'];
$fs->restrictFields = $params['restrictFields'];
$fs->fieldClasses = $params['fieldClasses'];
$fs->ajaxSafe = $params['ajaxSafe'];
return $fs->getFieldList();
}
/**
* Allows user code to hook into DataObject::getCMSFields prior to updateCMSFields
* being called on extensions
*
* @param callable $callback The callback to execute
*/
protected function beforeUpdateCMSFields($callback) {
$this->beforeExtending('updateCMSFields', $callback);
}
/**
* Centerpiece of every data administration interface in Silverstripe,
* which returns a {@link FieldList} suitable for a {@link Form} object.
* If not overloaded, we're using {@link scaffoldFormFields()} to automatically
* generate this set. To customize, overload this method in a subclass
* or extended onto it by using {@link DataExtension->updateCMSFields()}.
*
*
* class MyCustomClass extends DataObject {
* static $db = array('CustomProperty'=>'Boolean');
*
* function getCMSFields() {
* $fields = parent::getCMSFields();
* $fields->addFieldToTab('Root.Content',new CheckboxField('CustomProperty'));
* return $fields;
* }
* }
*
*
* @see Good example of complex FormField building: SiteTree::getCMSFields()
*
* @return FieldList Returns a TabSet for usage within the CMS - don't use for frontend forms.
*/
public function getCMSFields() {
$tabbedFields = $this->scaffoldFormFields(array(
// Don't allow has_many/many_many relationship editing before the record is first saved
'includeRelations' => ($this->ID > 0),
'tabbed' => true,
'ajaxSafe' => true
));
$this->extend('updateCMSFields', $tabbedFields);
return $tabbedFields;
}
/**
* need to be overload by solid dataobject, so that the customised actions of that dataobject,
* including that dataobject's extensions customised actions could be added to the EditForm.
*
* @return an Empty FieldList(); need to be overload by solid subclass
*/
public function getCMSActions() {
$actions = new FieldList();
$this->extend('updateCMSActions', $actions);
return $actions;
}
/**
* Used for simple frontend forms without relation editing
* or {@link TabSet} behaviour. Uses {@link scaffoldFormFields()}
* by default. To customize, either overload this method in your
* subclass, or extend it by {@link DataExtension->updateFrontEndFields()}.
*
* @todo Decide on naming for "website|frontend|site|page" and stick with it in the API
*
* @param array $params See {@link scaffoldFormFields()}
* @return FieldList Always returns a simple field collection without TabSet.
*/
public function getFrontEndFields($params = null) {
$untabbedFields = $this->scaffoldFormFields($params);
$this->extend('updateFrontEndFields', $untabbedFields);
return $untabbedFields;
}
/**
* Gets the value of a field.
* Called by {@link __get()} and any getFieldName() methods you might create.
*
* @param string $field The name of the field
*
* @return mixed The field value
*/
public function getField($field) {
// If we already have an object in $this->record, then we should just return that
if(isset($this->record[$field]) && is_object($this->record[$field])) {
return $this->record[$field];
}
// Do we have a field that needs to be lazy loaded?
if(isset($this->record[$field.'_Lazy'])) {
$tableClass = $this->record[$field.'_Lazy'];
$this->loadLazyFields($tableClass);
}
// In case of complex fields, return the DBField object
if(self::is_composite_field($this->class, $field)) {
$this->record[$field] = $this->dbObject($field);
}
return isset($this->record[$field]) ? $this->record[$field] : null;
}
/**
* Loads all the stub fields that an initial lazy load didn't load fully.
*
* @param string $tableClass Base table to load the values from. Others are joined as required.
* Not specifying a tableClass will load all lazy fields from all tables.
*/
protected function loadLazyFields($tableClass = null) {
if (!$tableClass) {
$loaded = array();
foreach ($this->record as $key => $value) {
if (strlen($key) > 5 && substr($key, -5) == '_Lazy' && !array_key_exists($value, $loaded)) {
$this->loadLazyFields($value);
$loaded[$value] = $value;
}
}
return;
}
$dataQuery = new DataQuery($tableClass);
// Reset query parameter context to that of this DataObject
if($params = $this->getSourceQueryParams()) {
foreach($params as $key => $value) {
$dataQuery->setQueryParam($key, $value);
}
}
// TableField sets the record ID to "new" on new row data, so don't try doing anything in that case
if(!is_numeric($this->record['ID'])) {
return;
}
// Limit query to the current record, unless it has the Versioned extension,
// in which case it requires special handling through augmentLoadLazyFields()
$baseTable = ClassInfo::baseDataClass($this);
$dataQuery->where([
"\"{$baseTable}\".\"ID\"" => $this->record['ID']
])->limit(1);
$columns = array();
// Add SQL for fields, both simple & multi-value
// TODO: This is copy & pasted from buildSQL(), it could be moved into a method
$databaseFields = self::database_fields($tableClass);
if($databaseFields) foreach($databaseFields as $k => $v) {
if(!isset($this->record[$k]) || $this->record[$k] === null) {
$columns[] = $k;
}
}
if ($columns) {
$query = $dataQuery->query();
$this->extend('augmentLoadLazyFields', $query, $dataQuery, $this);
$this->extend('augmentSQL', $query, $dataQuery);
$dataQuery->setQueriedColumns($columns);
$newData = $dataQuery->execute()->record();
// Load the data into record
if($newData) {
foreach($newData as $k => $v) {
if (in_array($k, $columns)) {
$this->record[$k] = $v;
$this->original[$k] = $v;
unset($this->record[$k . '_Lazy']);
}
}
// No data means that the query returned nothing; assign 'null' to all the requested fields
} else {
foreach($columns as $k) {
$this->record[$k] = null;
$this->original[$k] = null;
unset($this->record[$k . '_Lazy']);
}
}
}
}
/**
* Return the fields that have changed.
*
* The change level affects what the functions defines as "changed":
* - Level CHANGE_STRICT (integer 1) will return strict changes, even !== ones.
* - Level CHANGE_VALUE (integer 2) is more lenient, it will only return real data changes,
* for example a change from 0 to null would not be included.
*
* Example return:
*
* array(
* 'Title' = array('before' => 'Home', 'after' => 'Home-Changed', 'level' => DataObject::CHANGE_VALUE)
* )
*
*
* @param boolean|array $databaseFieldsOnly Filter to determine which fields to return. Set to true
* to return all database fields, or an array for an explicit filter. false returns all fields.
* @param int $changeLevel The strictness of what is defined as change. Defaults to strict
* @return array
*/
public function getChangedFields($databaseFieldsOnly = false, $changeLevel = self::CHANGE_STRICT) {
$changedFields = array();
// Update the changed array with references to changed obj-fields
foreach($this->record as $k => $v) {
// Prevents DBComposite infinite looping on isChanged
if(is_array($databaseFieldsOnly) && !in_array($k, $databaseFieldsOnly)) {
continue;
}
if(is_object($v) && method_exists($v, 'isChanged') && $v->isChanged()) {
$this->changed[$k] = self::CHANGE_VALUE;
}
}
if(is_array($databaseFieldsOnly)) {
$fields = array_intersect_key((array)$this->changed, array_flip($databaseFieldsOnly));
} elseif($databaseFieldsOnly) {
$fields = array_intersect_key((array)$this->changed, $this->db());
} else {
$fields = $this->changed;
}
// Filter the list to those of a certain change level
if($changeLevel > self::CHANGE_STRICT) {
if($fields) foreach($fields as $name => $level) {
if($level < $changeLevel) {
unset($fields[$name]);
}
}
}
if($fields) foreach($fields as $name => $level) {
$changedFields[$name] = array(
'before' => array_key_exists($name, $this->original) ? $this->original[$name] : null,
'after' => array_key_exists($name, $this->record) ? $this->record[$name] : null,
'level' => $level
);
}
return $changedFields;
}
/**
* Uses {@link getChangedFields()} to determine if fields have been changed
* since loading them from the database.
*
* @param string $fieldName Name of the database field to check, will check for any if not given
* @param int $changeLevel See {@link getChangedFields()}
* @return boolean
*/
public function isChanged($fieldName = null, $changeLevel = self::CHANGE_STRICT) {
$fields = $fieldName ? array($fieldName) : false;
$changed = $this->getChangedFields($fields, $changeLevel);
if(!isset($fieldName)) {
return !empty($changed);
}
else {
return array_key_exists($fieldName, $changed);
}
}
/**
* Set the value of the field
* Called by {@link __set()} and any setFieldName() methods you might create.
*
* @param string $fieldName Name of the field
* @param mixed $val New field value
* @return DataObject $this
*/
public function setField($fieldName, $val) {
//if it's a has_one component, destroy the cache
if (substr($fieldName, -2) == 'ID') {
unset($this->components[substr($fieldName, 0, -2)]);
}
// If we've just lazy-loaded the column, then we need to populate the $original array
if(isset($this->record[$fieldName.'_Lazy'])) {
$tableClass = $this->record[$fieldName.'_Lazy'];
$this->loadLazyFields($tableClass);
}
// Situation 1: Passing an DBField
if($val instanceof DBField) {
$val->setName($fieldName);
$val->saveInto($this);
// Situation 1a: Composite fields should remain bound in case they are
// later referenced to update the parent dataobject
if($val instanceof DBComposite) {
$val->bindTo($this);
$this->record[$fieldName] = $val;
}
// Situation 2: Passing a literal or non-DBField object
} else {
// If this is a proper database field, we shouldn't be getting non-DBField objects
if(is_object($val) && $this->db($fieldName)) {
user_error('DataObject::setField: passed an object that is not a DBField', E_USER_WARNING);
}
// if a field is not existing or has strictly changed
if(!isset($this->record[$fieldName]) || $this->record[$fieldName] !== $val) {
// TODO Add check for php-level defaults which are not set in the db
// TODO Add check for hidden input-fields (readonly) which are not set in the db
// At the very least, the type has changed
$this->changed[$fieldName] = self::CHANGE_STRICT;
if((!isset($this->record[$fieldName]) && $val) || (isset($this->record[$fieldName])
&& $this->record[$fieldName] != $val)) {
// Value has changed as well, not just the type
$this->changed[$fieldName] = self::CHANGE_VALUE;
}
// Value is always saved back when strict check succeeds.
$this->record[$fieldName] = $val;
}
}
return $this;
}
/**
* Set the value of the field, using a casting object.
* This is useful when you aren't sure that a date is in SQL format, for example.
* setCastedField() can also be used, by forms, to set related data. For example, uploaded images
* can be saved into the Image table.
*
* @param string $fieldName Name of the field
* @param mixed $value New field value
* @return $this
*/
public function setCastedField($fieldName, $value) {
if(!$fieldName) {
user_error("DataObject::setCastedField: Called without a fieldName", E_USER_ERROR);
}
$fieldObj = $this->dbObject($fieldName);
if($fieldObj) {
$fieldObj->setValue($value);
$fieldObj->saveInto($this);
} else {
$this->$fieldName = $value;
}
return $this;
}
public function castingHelper($field) {
// Allows db to act as implicit casting override
if($fieldSpec = $this->db($field)) {
return $fieldSpec;
}
return parent::castingHelper($field);
}
/**
* Returns true if the given field exists in a database column on any of
* the objects tables and optionally look up a dynamic getter with
* get().
*
* @param string $field Name of the field
* @return boolean True if the given field exists
*/
public function hasField($field) {
return (
array_key_exists($field, $this->record)
|| $this->db($field)
|| (substr($field,-2) == 'ID') && $this->hasOneComponent(substr($field,0, -2))
|| $this->hasMethod("get{$field}")
);
}
/**
* Returns true if the given field exists as a database column
*
* @param string $field Name of the field
*
* @return boolean
*/
public function hasDatabaseField($field) {
return $this->db($field)
&& ! self::is_composite_field(get_class($this), $field);
}
/**
* Returns the field type of the given field, if it belongs to this class, and not a parent.
* Note that the field type will not include constructor arguments in round brackets, only the classname.
*
* @param string $field Name of the field
* @return string The field type of the given field
*/
public function hasOwnTableDatabaseField($field) {
return self::has_own_table_database_field($this->class, $field);
}
/**
* Returns the field type of the given field, if it belongs to this class, and not a parent.
* Note that the field type will not include constructor arguments in round brackets, only the classname.
*
* @param string $class Class name to check
* @param string $field Name of the field
* @return string The field type of the given field
*/
public static function has_own_table_database_field($class, $field) {
$fieldMap = self::database_fields($class);
// Remove string-based "constructor-arguments" from the DBField definition
if(isset($fieldMap[$field])) {
$spec = $fieldMap[$field];
if(is_string($spec)) return strtok($spec,'(');
else return $spec['type'];
}
}
/**
* Returns true if given class has its own table. Uses the rules for whether the table should exist rather than
* actually looking in the database.
*
* @param string $dataClass
* @return bool
*/
public static function has_own_table($dataClass) {
if(!is_subclass_of($dataClass,'DataObject')) return false;
$dataClass = ClassInfo::class_name($dataClass);
if(!isset(self::$_cache_has_own_table[$dataClass])) {
if(get_parent_class($dataClass) == 'DataObject') {
self::$_cache_has_own_table[$dataClass] = true;
} else {
self::$_cache_has_own_table[$dataClass]
= Config::inst()->get($dataClass, 'db', Config::UNINHERITED)
|| Config::inst()->get($dataClass, 'has_one', Config::UNINHERITED);
}
}
return self::$_cache_has_own_table[$dataClass];
}
/**
* Returns true if the member is allowed to do the given action.
* See {@link extendedCan()} for a more versatile tri-state permission control.
*
* @param string $perm The permission to be checked, such as 'View'.
* @param Member $member The member whose permissions need checking. Defaults to the currently logged
* in user.
*
* @return boolean True if the the member is allowed to do the given action
*/
public function can($perm, $member = null) {
if(!isset($member)) {
$member = Member::currentUser();
}
if(Permission::checkMember($member, "ADMIN")) return true;
if($this->manyManyComponent('Can' . $perm)) {
if($this->ParentID && $this->SecurityType == 'Inherit') {
if(!($p = $this->Parent)) {
return false;
}
return $this->Parent->can($perm, $member);
} else {
$permissionCache = $this->uninherited('permissionCache');
$memberID = $member ? $member->ID : 'none';
if(!isset($permissionCache[$memberID][$perm])) {
if($member->ID) {
$groups = $member->Groups();
}
$groupList = implode(', ', $groups->column("ID"));
// TODO Fix relation table hardcoding
$query = new SQLSelect(
"\"Page_Can$perm\".PageID",
array("\"Page_Can$perm\""),
"GroupID IN ($groupList)");
$permissionCache[$memberID][$perm] = $query->execute()->column();
if($perm == "View") {
// TODO Fix relation table hardcoding
$query = new SQLSelect("\"SiteTree\".\"ID\"", array(
"\"SiteTree\"",
"LEFT JOIN \"Page_CanView\" ON \"Page_CanView\".\"PageID\" = \"SiteTree\".\"ID\""
), "\"Page_CanView\".\"PageID\" IS NULL");
$unsecuredPages = $query->execute()->column();
if($permissionCache[$memberID][$perm]) {
$permissionCache[$memberID][$perm]
= array_merge($permissionCache[$memberID][$perm], $unsecuredPages);
} else {
$permissionCache[$memberID][$perm] = $unsecuredPages;
}
}
Config::inst()->update($this->class, 'permissionCache', $permissionCache);
}
if($permissionCache[$memberID][$perm]) {
return in_array($this->ID, $permissionCache[$memberID][$perm]);
}
}
} else {
return parent::can($perm, $member);
}
}
/**
* Process tri-state responses from permission-alterting extensions. The extensions are
* expected to return one of three values:
*
* - false: Disallow this permission, regardless of what other extensions say
* - true: Allow this permission, as long as no other extensions return false
* - NULL: Don't affect the outcome
*
* This method itself returns a tri-state value, and is designed to be used like this:
*
*
* $extended = $this->extendedCan('canDoSomething', $member);
* if($extended !== null) return $extended;
* else return $normalValue;
*
*
* @param string $methodName Method on the same object, e.g. {@link canEdit()}
* @param Member|int $member
* @param array $context Optional context
* @return boolean|null
*/
public function extendedCan($methodName, $member, $context = array()) {
$results = $this->extend($methodName, $member, $context);
if($results && is_array($results)) {
// Remove NULLs
$results = array_filter($results, function($v) {return !is_null($v);});
// If there are any non-NULL responses, then return the lowest one of them.
// If any explicitly deny the permission, then we don't get access
if($results) return min($results);
}
return null;
}
/**
* @param Member $member
* @return boolean
*/
public function canView($member = null) {
$extended = $this->extendedCan(__FUNCTION__, $member);
if($extended !== null) {
return $extended;
}
return Permission::check('ADMIN', 'any', $member);
}
/**
* @param Member $member
* @return boolean
*/
public function canEdit($member = null) {
$extended = $this->extendedCan(__FUNCTION__, $member);
if($extended !== null) {
return $extended;
}
return Permission::check('ADMIN', 'any', $member);
}
/**
* @param Member $member
* @return boolean
*/
public function canDelete($member = null) {
$extended = $this->extendedCan(__FUNCTION__, $member);
if($extended !== null) {
return $extended;
}
return Permission::check('ADMIN', 'any', $member);
}
/**
* @param Member $member
* @param array $context Additional context-specific data which might
* affect whether (or where) this object could be created.
* @return boolean
*/
public function canCreate($member = null, $context = array()) {
$extended = $this->extendedCan(__FUNCTION__, $member, $context);
if($extended !== null) {
return $extended;
}
return Permission::check('ADMIN', 'any', $member);
}
/**
* Debugging used by Debug::show()
*
* @return string HTML data representing this object
*/
public function debug() {
$val = "Database record: $this->class
\n\n";
if($this->record) foreach($this->record as $fieldName => $fieldVal) {
$val .= "\t- $fieldName: " . Debug::text($fieldVal) . "
\n";
}
$val .= "
\n";
return $val;
}
/**
* Return the DBField object that represents the given field.
* This works similarly to obj() with 2 key differences:
* - it still returns an object even when the field has no value.
* - it only matches fields and not methods
* - it matches foreign keys generated by has_one relationships, eg, "ParentID"
*
* @param string $fieldName Name of the field
* @return DBField The field as a DBField object
*/
public function dbObject($fieldName) {
$value = isset($this->record[$fieldName])
? $this->record[$fieldName]
: null;
// If we have a DBField object in $this->record, then return that
if(is_object($value)) {
return $value;
}
// Build and populate new field otherwise
$helper = $this->db($fieldName, true);
if($helper) {
list($table, $spec) = explode('.', $helper);
$obj = Object::create_from_string($spec, $fieldName);
$obj->setTable($table);
$obj->setValue($value, $this, false);
return $obj;
}
}
/**
* Traverses to a DBField referenced by relationships between data objects.
*
* The path to the related field is specified with dot separated syntax
* (eg: Parent.Child.Child.FieldName).
*
* @param string $fieldPath
*
* @return mixed DBField of the field on the object or a DataList instance.
*/
public function relObject($fieldPath) {
$object = null;
if(strpos($fieldPath, '.') !== false) {
$parts = explode('.', $fieldPath);
$fieldName = array_pop($parts);
// Traverse dot syntax
$component = $this;
foreach($parts as $relation) {
if($component instanceof SS_List) {
if(method_exists($component,$relation)) {
$component = $component->$relation();
} else {
$component = $component->relation($relation);
}
} else {
$component = $component->$relation();
}
}
$object = $component->dbObject($fieldName);
} else {
$object = $this->dbObject($fieldPath);
}
return $object;
}
/**
* Traverses to a field referenced by relationships between data objects, returning the value
* The path to the related field is specified with dot separated syntax (eg: Parent.Child.Child.FieldName)
*
* @param $fieldName string
* @return string | null - will return null on a missing value
*/
public function relField($fieldName) {
$component = $this;
// We're dealing with relations here so we traverse the dot syntax
if(strpos($fieldName, '.') !== false) {
$relations = explode('.', $fieldName);
$fieldName = array_pop($relations);
foreach($relations as $relation) {
// Inspect $component for element $relation
if($component->hasMethod($relation)) {
// Check nested method
$component = $component->$relation();
} elseif($component instanceof SS_List) {
// Select adjacent relation from DataList
$component = $component->relation($relation);
} elseif($component instanceof DataObject
&& ($dbObject = $component->dbObject($relation))
) {
// Select db object
$component = $dbObject;
} else {
user_error("$relation is not a relation/field on ".get_class($component), E_USER_ERROR);
}
}
}
// Bail if the component is null
if(!$component) {
return null;
}
if($component->hasMethod($fieldName)) {
return $component->$fieldName();
}
return $component->$fieldName;
}
/**
* Temporary hack to return an association name, based on class, to get around the mangle
* of having to deal with reverse lookup of relationships to determine autogenerated foreign keys.
*
* @return String
*/
public function getReverseAssociation($className) {
if (is_array($this->manyMany())) {
$many_many = array_flip($this->manyMany());
if (array_key_exists($className, $many_many)) return $many_many[$className];
}
if (is_array($this->hasMany())) {
$has_many = array_flip($this->hasMany());
if (array_key_exists($className, $has_many)) return $has_many[$className];
}
if (is_array($this->hasOne())) {
$has_one = array_flip($this->hasOne());
if (array_key_exists($className, $has_one)) return $has_one[$className];
}
return false;
}
/**
* Return all objects matching the filter
* sub-classes are automatically selected and included
*
* @param string $callerClass The class of objects to be returned
* @param string|array $filter A filter to be inserted into the WHERE clause.
* Supports parameterised queries. See SQLSelect::addWhere() for syntax examples.
* @param string|array $sort A sort expression to be inserted into the ORDER
* BY clause. If omitted, self::$default_sort will be used.
* @param string $join Deprecated 3.0 Join clause. Use leftJoin($table, $joinClause) instead.
* @param string|array $limit A limit expression to be inserted into the LIMIT clause.
* @param string $containerClass The container class to return the results in.
*
* @todo $containerClass is Ignored, why?
*
* @return DataList The objects matching the filter, in the class specified by $containerClass
*/
public static function get($callerClass = null, $filter = "", $sort = "", $join = "", $limit = null,
$containerClass = 'DataList') {
if($callerClass == null) {
$callerClass = get_called_class();
if($callerClass == 'DataObject') {
throw new \InvalidArgumentException('Call ::get() instead of DataObject::get()');
}
if($filter || $sort || $join || $limit || ($containerClass != 'DataList')) {
throw new \InvalidArgumentException('If calling ::get() then you shouldn\'t pass any other'
. ' arguments');
}
$result = DataList::create(get_called_class());
$result->setDataModel(DataModel::inst());
return $result;
}
if($join) {
throw new \InvalidArgumentException(
'The $join argument has been removed. Use leftJoin($table, $joinClause) instead.'
);
}
$result = DataList::create($callerClass)->where($filter)->sort($sort);
if($limit && strpos($limit, ',') !== false) {
$limitArguments = explode(',', $limit);
$result = $result->limit($limitArguments[1],$limitArguments[0]);
} elseif($limit) {
$result = $result->limit($limit);
}
$result->setDataModel(DataModel::inst());
return $result;
}
/**
* Return the first item matching the given query.
* All calls to get_one() are cached.
*
* @param string $callerClass The class of objects to be returned
* @param string|array $filter A filter to be inserted into the WHERE clause.
* Supports parameterised queries. See SQLSelect::addWhere() for syntax examples.
* @param boolean $cache Use caching
* @param string $orderby A sort expression to be inserted into the ORDER BY clause.
*
* @return DataObject The first item matching the query
*/
public static function get_one($callerClass, $filter = "", $cache = true, $orderby = "") {
$SNG = singleton($callerClass);
$cacheComponents = array($filter, $orderby, $SNG->extend('cacheKeyComponent'));
$cacheKey = md5(var_export($cacheComponents, true));
// Flush destroyed items out of the cache
if($cache && isset(self::$_cache_get_one[$callerClass][$cacheKey])
&& self::$_cache_get_one[$callerClass][$cacheKey] instanceof DataObject
&& self::$_cache_get_one[$callerClass][$cacheKey]->destroyed) {
self::$_cache_get_one[$callerClass][$cacheKey] = false;
}
if(!$cache || !isset(self::$_cache_get_one[$callerClass][$cacheKey])) {
$dl = DataObject::get($callerClass)->where($filter)->sort($orderby);
$item = $dl->First();
if($cache) {
self::$_cache_get_one[$callerClass][$cacheKey] = $item;
if(!self::$_cache_get_one[$callerClass][$cacheKey]) {
self::$_cache_get_one[$callerClass][$cacheKey] = false;
}
}
}
return $cache ? self::$_cache_get_one[$callerClass][$cacheKey] : $item;
}
/**
* Flush the cached results for all relations (has_one, has_many, many_many)
* Also clears any cached aggregate data.
*
* @param boolean $persistent When true will also clear persistent data stored in the Cache system.
* When false will just clear session-local cached data
* @return DataObject $this
*/
public function flushCache($persistent = true) {
if($this->class == 'DataObject') {
self::$_cache_get_one = array();
return $this;
}
$classes = ClassInfo::ancestry($this->class);
foreach($classes as $class) {
if(isset(self::$_cache_get_one[$class])) unset(self::$_cache_get_one[$class]);
}
$this->extend('flushCache');
$this->components = array();
return $this;
}
/**
* Flush the get_one global cache and destroy associated objects.
*/
public static function flush_and_destroy_cache() {
if(self::$_cache_get_one) foreach(self::$_cache_get_one as $class => $items) {
if(is_array($items)) foreach($items as $item) {
if($item) $item->destroy();
}
}
self::$_cache_get_one = array();
}
/**
* Reset all global caches associated with DataObject.
*/
public static function reset() {
DBClassName::clear_classname_cache();
self::$_cache_has_own_table = array();
self::$_cache_get_one = array();
self::$_cache_composite_fields = array();
self::$_cache_database_fields = array();
self::$_cache_get_class_ancestry = array();
self::$_cache_field_labels = array();
}
/**
* Return the given element, searching by ID
*
* @param string $callerClass The class of the object to be returned
* @param int $id The id of the element
* @param boolean $cache See {@link get_one()}
*
* @return DataObject The element
*/
public static function get_by_id($callerClass, $id, $cache = true) {
if(!is_numeric($id)) {
user_error("DataObject::get_by_id passed a non-numeric ID #$id", E_USER_WARNING);
}
// Check filter column
if(is_subclass_of($callerClass, 'DataObject')) {
$baseClass = ClassInfo::baseDataClass($callerClass);
$column = "\"$baseClass\".\"ID\"";
} else{
// This simpler code will be used by non-DataObject classes that implement DataObjectInterface
$column = '"ID"';
}
// Relegate to get_one
return DataObject::get_one($callerClass, array($column => $id), $cache);
}
/**
* Get the name of the base table for this object
*/
public function baseTable() {
$tableClasses = ClassInfo::dataClassesFor($this->class);
return array_shift($tableClasses);
}
/**
* @var Array Parameters used in the query that built this object.
* This can be used by decorators (e.g. lazy loading) to
* run additional queries using the same context.
*/
protected $sourceQueryParams;
/**
* @see $sourceQueryParams
* @return array
*/
public function getSourceQueryParams() {
return $this->sourceQueryParams;
}
/**
* Get list of parameters that should be inherited to relations on this object
*
* @return array
*/
public function getInheritableQueryParams() {
$params = $this->getSourceQueryParams();
$this->extend('updateInheritableQueryParams', $params);
return $params;
}
/**
* @see $sourceQueryParams
* @param array
*/
public function setSourceQueryParams($array) {
$this->sourceQueryParams = $array;
}
/**
* @see $sourceQueryParams
* @param array
*/
public function setSourceQueryParam($key, $value) {
$this->sourceQueryParams[$key] = $value;
}
/**
* @see $sourceQueryParams
* @return Mixed
*/
public function getSourceQueryParam($key) {
if(isset($this->sourceQueryParams[$key])) return $this->sourceQueryParams[$key];
else return null;
}
//-------------------------------------------------------------------------------------------//
/**
* Return the database indexes on this table.
* This array is indexed by the name of the field with the index, and
* the value is the type of index.
*/
public function databaseIndexes() {
$has_one = $this->uninherited('has_one',true);
$classIndexes = $this->uninherited('indexes',true);
//$fileIndexes = $this->uninherited('fileIndexes', true);
$indexes = array();
if($has_one) {
foreach($has_one as $relationshipName => $fieldType) {
$indexes[$relationshipName . 'ID'] = true;
}
}
if($classIndexes) {
foreach($classIndexes as $indexName => $indexType) {
$indexes[$indexName] = $indexType;
}
}
if(get_parent_class($this) == "DataObject") {
$indexes['ClassName'] = true;
}
return $indexes;
}
/**
* Check the database schema and update it as necessary.
*
* @uses DataExtension->augmentDatabase()
*/
public function requireTable() {
// Only build the table if we've actually got fields
$fields = self::database_fields($this->class);
$extensions = self::database_extensions($this->class);
$indexes = $this->databaseIndexes();
// Validate relationship configuration
$this->validateModelDefinitions();
if($fields) {
$hasAutoIncPK = ($this->class == ClassInfo::baseDataClass($this->class));
DB::require_table($this->class, $fields, $indexes, $hasAutoIncPK, $this->stat('create_table_options'),
$extensions);
} else {
DB::dont_require_table($this->class);
}
// Build any child tables for many_many items
if($manyMany = $this->uninherited('many_many', true)) {
$extras = $this->uninherited('many_many_extraFields', true);
foreach($manyMany as $relationship => $childClass) {
// Build field list
$manymanyFields = array(
"{$this->class}ID" => "Int",
(($this->class == $childClass) ? "ChildID" : "{$childClass}ID") => "Int",
);
if(isset($extras[$relationship])) {
$manymanyFields = array_merge($manymanyFields, $extras[$relationship]);
}
// Build index list
$manymanyIndexes = array(
"{$this->class}ID" => true,
(($this->class == $childClass) ? "ChildID" : "{$childClass}ID") => true,
);
DB::require_table("{$this->class}_$relationship", $manymanyFields, $manymanyIndexes, true, null,
$extensions);
}
}
// Let any extentions make their own database fields
$this->extend('augmentDatabase', $dummy);
}
/**
* Validate that the configured relations for this class use the correct syntaxes
* @throws LogicException
*/
protected function validateModelDefinitions() {
$modelDefinitions = array(
'db' => Config::inst()->get($this->class, 'db', Config::UNINHERITED),
'has_one' => Config::inst()->get($this->class, 'has_one', Config::UNINHERITED),
'has_many' => Config::inst()->get($this->class, 'has_many', Config::UNINHERITED),
'belongs_to' => Config::inst()->get($this->class, 'belongs_to', Config::UNINHERITED),
'many_many' => Config::inst()->get($this->class, 'many_many', Config::UNINHERITED),
'belongs_many_many' => Config::inst()->get($this->class, 'belongs_many_many', Config::UNINHERITED),
'many_many_extraFields' => Config::inst()->get($this->class, 'many_many_extraFields', Config::UNINHERITED)
);
foreach($modelDefinitions as $defType => $relations) {
if( ! $relations) continue;
foreach($relations as $k => $v) {
if($defType === 'many_many_extraFields') {
if(!is_array($v)) {
throw new LogicException("$this->class::\$many_many_extraFields has a bad entry: "
. var_export($k, true) . " => " . var_export($v, true)
. ". Each many_many_extraFields entry should map to a field specification array.");
}
} else {
if(!is_string($k) || is_numeric($k) || !is_string($v)) {
throw new LogicException("$this->class::$defType has a bad entry: "
. var_export($k, true). " => " . var_export($v, true) . ". Each map key should be a
relationship name, and the map value should be the data class to join to.");
}
}
}
}
}
/**
* Add default records to database. This function is called whenever the
* database is built, after the database tables have all been created. Overload
* this to add default records when the database is built, but make sure you
* call parent::requireDefaultRecords().
*
* @uses DataExtension->requireDefaultRecords()
*/
public function requireDefaultRecords() {
$defaultRecords = $this->stat('default_records');
if(!empty($defaultRecords)) {
$hasData = DataObject::get_one($this->class);
if(!$hasData) {
$className = $this->class;
foreach($defaultRecords as $record) {
$obj = $this->model->$className->newObject($record);
$obj->write();
}
DB::alteration_message("Added default records to $className table","created");
}
}
// Let any extentions make their own database default data
$this->extend('requireDefaultRecords', $dummy);
}
/**
* Get the default searchable fields for this object, as defined in the
* $searchable_fields list. If searchable fields are not defined on the
* data object, uses a default selection of summary fields.
*
* @return array
*/
public function searchableFields() {
// can have mixed format, need to make consistent in most verbose form
$fields = $this->stat('searchable_fields');
$labels = $this->fieldLabels();
// fallback to summary fields (unless empty array is explicitly specified)
if( ! $fields && ! is_array($fields)) {
$summaryFields = array_keys($this->summaryFields());
$fields = array();
// remove the custom getters as the search should not include them
if($summaryFields) {
foreach($summaryFields as $key => $name) {
$spec = $name;
// Extract field name in case this is a method called on a field (e.g. "Date.Nice")
if(($fieldPos = strpos($name, '.')) !== false) {
$name = substr($name, 0, $fieldPos);
}
if($this->hasDatabaseField($name)) {
$fields[] = $name;
} elseif($this->relObject($spec)) {
$fields[] = $spec;
}
}
}
}
// we need to make sure the format is unified before
// augmenting fields, so extensions can apply consistent checks
// but also after augmenting fields, because the extension
// might use the shorthand notation as well
// rewrite array, if it is using shorthand syntax
$rewrite = array();
foreach($fields as $name => $specOrName) {
$identifer = (is_int($name)) ? $specOrName : $name;
if(is_int($name)) {
// Format: array('MyFieldName')
$rewrite[$identifer] = array();
} elseif(is_array($specOrName)) {
// Format: array('MyFieldName' => array(
// 'filter => 'ExactMatchFilter',
// 'field' => 'NumericField', // optional
// 'title' => 'My Title', // optional
// ))
$rewrite[$identifer] = array_merge(
array('filter' => $this->relObject($identifer)->stat('default_search_filter_class')),
(array)$specOrName
);
} else {
// Format: array('MyFieldName' => 'ExactMatchFilter')
$rewrite[$identifer] = array(
'filter' => $specOrName,
);
}
if(!isset($rewrite[$identifer]['title'])) {
$rewrite[$identifer]['title'] = (isset($labels[$identifer]))
? $labels[$identifer] : FormField::name_to_label($identifer);
}
if(!isset($rewrite[$identifer]['filter'])) {
$rewrite[$identifer]['filter'] = 'PartialMatchFilter';
}
}
$fields = $rewrite;
// apply DataExtensions if present
$this->extend('updateSearchableFields', $fields);
return $fields;
}
/**
* Get any user defined searchable fields labels that
* exist. Allows overriding of default field names in the form
* interface actually presented to the user.
*
* The reason for keeping this separate from searchable_fields,
* which would be a logical place for this functionality, is to
* avoid bloating and complicating the configuration array. Currently
* much of this system is based on sensible defaults, and this property
* would generally only be set in the case of more complex relationships
* between data object being required in the search interface.
*
* Generates labels based on name of the field itself, if no static property
* {@link self::field_labels} exists.
*
* @uses $field_labels
* @uses FormField::name_to_label()
*
* @param boolean $includerelations a boolean value to indicate if the labels returned include relation fields
*
* @return array|string Array of all element labels if no argument given, otherwise the label of the field
*/
public function fieldLabels($includerelations = true) {
$cacheKey = $this->class . '_' . $includerelations;
if(!isset(self::$_cache_field_labels[$cacheKey])) {
$customLabels = $this->stat('field_labels');
$autoLabels = array();
// get all translated static properties as defined in i18nCollectStatics()
$ancestry = ClassInfo::ancestry($this->class);
$ancestry = array_reverse($ancestry);
if($ancestry) foreach($ancestry as $ancestorClass) {
if($ancestorClass == 'ViewableData') break;
$types = array(
'db' => (array)Config::inst()->get($ancestorClass, 'db', Config::UNINHERITED)
);
if($includerelations){
$types['has_one'] = (array)Config::inst()->get($ancestorClass, 'has_one', Config::UNINHERITED);
$types['has_many'] = (array)Config::inst()->get($ancestorClass, 'has_many', Config::UNINHERITED);
$types['many_many'] = (array)Config::inst()->get($ancestorClass, 'many_many', Config::UNINHERITED);
$types['belongs_many_many'] = (array)Config::inst()->get($ancestorClass, 'belongs_many_many', Config::UNINHERITED);
}
foreach($types as $type => $attrs) {
foreach($attrs as $name => $spec) {
$autoLabels[$name] = _t("{$ancestorClass}.{$type}_{$name}",FormField::name_to_label($name));
}
}
}
$labels = array_merge((array)$autoLabels, (array)$customLabels);
$this->extend('updateFieldLabels', $labels);
self::$_cache_field_labels[$cacheKey] = $labels;
}
return self::$_cache_field_labels[$cacheKey];
}
/**
* Get a human-readable label for a single field,
* see {@link fieldLabels()} for more details.
*
* @uses fieldLabels()
* @uses FormField::name_to_label()
*
* @param string $name Name of the field
* @return string Label of the field
*/
public function fieldLabel($name) {
$labels = $this->fieldLabels();
return (isset($labels[$name])) ? $labels[$name] : FormField::name_to_label($name);
}
/**
* Get the default summary fields for this object.
*
* @todo use the translation apparatus to return a default field selection for the language
*
* @return array
*/
public function summaryFields() {
$fields = $this->stat('summary_fields');
// if fields were passed in numeric array,
// convert to an associative array
if($fields && array_key_exists(0, $fields)) {
$fields = array_combine(array_values($fields), array_values($fields));
}
if (!$fields) {
$fields = array();
// try to scaffold a couple of usual suspects
if ($this->hasField('Name')) $fields['Name'] = 'Name';
if ($this->hasDataBaseField('Title')) $fields['Title'] = 'Title';
if ($this->hasField('Description')) $fields['Description'] = 'Description';
if ($this->hasField('FirstName')) $fields['FirstName'] = 'First Name';
}
$this->extend("updateSummaryFields", $fields);
// Final fail-over, just list ID field
if(!$fields) $fields['ID'] = 'ID';
// Localize fields (if possible)
foreach($this->fieldLabels(false) as $name => $label) {
// only attempt to localize if the label definition is the same as the field name.
// this will preserve any custom labels set in the summary_fields configuration
if(isset($fields[$name]) && $name === $fields[$name]) {
$fields[$name] = $label;
}
}
return $fields;
}
/**
* Defines a default list of filters for the search context.
*
* If a filter class mapping is defined on the data object,
* it is constructed here. Otherwise, the default filter specified in
* {@link DBField} is used.
*
* @todo error handling/type checking for valid FormField and SearchFilter subclasses?
*
* @return array
*/
public function defaultSearchFilters() {
$filters = array();
foreach($this->searchableFields() as $name => $spec) {
$filterClass = $spec['filter'];
if($spec['filter'] instanceof SearchFilter) {
$filters[$name] = $spec['filter'];
} else {
$class = $spec['filter'];
if(!is_subclass_of($spec['filter'], 'SearchFilter')) {
$class = 'PartialMatchFilter';
}
$filters[$name] = new $class($name);
}
}
return $filters;
}
/**
* @return boolean True if the object is in the database
*/
public function isInDB() {
return is_numeric( $this->ID ) && $this->ID > 0;
}
/*
* @ignore
*/
private static $subclass_access = true;
/**
* Temporarily disable subclass access in data object qeur
*/
public static function disable_subclass_access() {
self::$subclass_access = false;
}
public static function enable_subclass_access() {
self::$subclass_access = true;
}
//-------------------------------------------------------------------------------------------//
/**
* Database field definitions.
* This is a map from field names to field type. The field
* type should be a class that extends .
* @var array
* @config
*/
private static $db = null;
/**
* Use a casting object for a field. This is a map from
* field name to class name of the casting object.
*
* @var array
*/
private static $casting = array(
"Title" => 'Text',
);
/**
* Specify custom options for a CREATE TABLE call.
* Can be used to specify a custom storage engine for specific database table.
* All options have to be keyed for a specific database implementation,
* identified by their class name (extending from {@link SS_Database}).
*
*
* array(
* 'MySQLDatabase' => 'ENGINE=MyISAM'
* )
*
*
* Caution: This API is experimental, and might not be
* included in the next major release. Please use with care.
*
* @var array
* @config
*/
private static $create_table_options = array(
'MySQLDatabase' => 'ENGINE=InnoDB'
);
/**
* If a field is in this array, then create a database index
* on that field. This is a map from fieldname to index type.
* See {@link SS_Database->requireIndex()} and custom subclasses for details on the array notation.
*
* @var array
* @config
*/
private static $indexes = null;
/**
* Inserts standard column-values when a DataObject
* is instanciated. Does not insert default records {@see $default_records}.
* This is a map from fieldname to default value.
*
* - If you would like to change a default value in a sub-class, just specify it.
* - If you would like to disable the default value given by a parent class, set the default value to 0,'',
* or false in your subclass. Setting it to null won't work.
*
* @var array
* @config
*/
private static $defaults = null;
/**
* Multidimensional array which inserts default data into the database
* on a db/build-call as long as the database-table is empty. Please use this only
* for simple constructs, not for SiteTree-Objects etc. which need special
* behaviour such as publishing and ParentNodes.
*
* Example:
* array(
* array('Title' => "DefaultPage1", 'PageTitle' => 'page1'),
* array('Title' => "DefaultPage2")
* ).
*
* @var array
* @config
*/
private static $default_records = null;
/**
* One-to-zero relationship defintion. This is a map of component name to data type. In order to turn this into a
* true one-to-one relationship you can add a {@link DataObject::$belongs_to} relationship on the child class.
*
* Note that you cannot have a has_one and belongs_to relationship with the same name.
*
* @var array
* @config
*/
private static $has_one = null;
/**
* A meta-relationship that allows you to define the reverse side of a {@link DataObject::$has_one}.
*
* This does not actually create any data structures, but allows you to query the other object in a one-to-one
* relationship from the child object. If you have multiple belongs_to links to another object you can use the
* syntax "ClassName.HasOneName" to specify which foreign has_one key on the other object to use.
*
* Note that you cannot have a has_one and belongs_to relationship with the same name.
*
* @var array
* @config
*/
private static $belongs_to;
/**
* This defines a one-to-many relationship. It is a map of component name to the remote data class.
*
* This relationship type does not actually create a data structure itself - you need to define a matching $has_one
* relationship on the child class. Also, if the $has_one relationship on the child class has multiple links to this
* class you can use the syntax "ClassName.HasOneRelationshipName" in the remote data class definition to show
* which foreign key to use.
*
* @var array
* @config
*/
private static $has_many = null;
/**
* many-many relationship definitions.
* This is a map from component name to data type.
* @var array
* @config
*/
private static $many_many = null;
/**
* Extra fields to include on the connecting many-many table.
* This is a map from field name to field type.
*
* Example code:
*
* public static $many_many_extraFields = array(
* 'Members' => array(
* 'Role' => 'Varchar(100)'
* )
* );
*
*
* @var array
* @config
*/
private static $many_many_extraFields = null;
/**
* The inverse side of a many-many relationship.
* This is a map from component name to data type.
* @var array
* @config
*/
private static $belongs_many_many = null;
/**
* The default sort expression. This will be inserted in the ORDER BY
* clause of a SQL query if no other sort expression is provided.
* @var string
* @config
*/
private static $default_sort = null;
/**
* Default list of fields that can be scaffolded by the ModelAdmin
* search interface.
*
* Overriding the default filter, with a custom defined filter:
*
* static $searchable_fields = array(
* "Name" => "PartialMatchFilter"
* );
*
*
* Overriding the default form fields, with a custom defined field.
* The 'filter' parameter will be generated from {@link DBField::$default_search_filter_class}.
* The 'title' parameter will be generated from {@link DataObject->fieldLabels()}.
*
* static $searchable_fields = array(
* "Name" => array(
* "field" => "TextField"
* )
* );
*
*
* Overriding the default form field, filter and title:
*
* static $searchable_fields = array(
* "Organisation.ZipCode" => array(
* "field" => "TextField",
* "filter" => "PartialMatchFilter",
* "title" => 'Organisation ZIP'
* )
* );
*
* @config
*/
private static $searchable_fields = null;
/**
* User defined labels for searchable_fields, used to override
* default display in the search form.
* @config
*/
private static $field_labels = null;
/**
* Provides a default list of fields to be used by a 'summary'
* view of this object.
* @config
*/
private static $summary_fields = null;
/**
* Collect all static properties on the object
* which contain natural language, and need to be translated.
* The full entity name is composed from the class name and a custom identifier.
*
* @return array A numerical array which contains one or more entities in array-form.
* Each numeric entity array contains the "arguments" for a _t() call as array values:
* $entity, $string, $priority, $context.
*/
public function provideI18nEntities() {
$entities = array();
$entities["{$this->class}.SINGULARNAME"] = array(
$this->singular_name(),
'Singular name of the object, used in dropdowns and to generally identify a single object in the interface'
);
$entities["{$this->class}.PLURALNAME"] = array(
$this->plural_name(),
'Pural name of the object, used in dropdowns and to generally identify a collection of this object in the'
. ' interface'
);
return $entities;
}
/**
* Returns true if the given method/parameter has a value
* (Uses the DBField::hasValue if the parameter is a database field)
*
* @param string $field The field name
* @param array $arguments
* @param bool $cache
* @return boolean
*/
public function hasValue($field, $arguments = null, $cache = true) {
// has_one fields should not use dbObject to check if a value is given
if(!$this->hasOneComponent($field) && ($obj = $this->dbObject($field))) {
return $obj->exists();
} else {
return parent::hasValue($field, $arguments, $cache);
}
}
}