* class Article extends DataObject implements PermissionProvider {
* static $api_access = true;
*
* public function canView($member = false) {
* return Permission::check('ARTICLE_VIEW');
* }
* public function canEdit($member = false) {
* return Permission::check('ARTICLE_EDIT');
* }
* public function canDelete() {
* return Permission::check('ARTICLE_DELETE');
* }
* public function canCreate() {
* return Permission::check('ARTICLE_CREATE');
* }
* public 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 $api_access = true;
*
* public function canView($member = false) {
* if(!$member) $member = Member::currentUser();
* return $member->inGroup('Subscribers');
* }
* public function canEdit($member = false) {
* if(!$member) $member = Member::currentUser();
* return $member->inGroup('Editors');
* }
*
* // ...
* }
*
*
* @package sapphire
* @subpackage model
*/
class DataObject extends ViewableData implements DataObjectInterface {
/**
* Data stored in this objects database record. An array indexed
* by fieldname.
* @var array
*/
protected $record;
/**
* An array indexed by fieldname, true if the field has been changed.
* @var array
*/
protected $changed;
/**
* The database record (in the same format as $record), before
* any changes.
* @var array
*/
protected $original;
/**
* The one-to-one, one-to-many and many-to-one components
* indexed by component name.
* @var array
*/
protected $components;
/**
* DEPRECATED
*
* @var array List of fields and their old values before the last write.
*/
protected $lastWriteFields;
/**
* True if this DataObject has been destroyed.
* @var boolean
*/
public $destroyed = false;
/**
* Human-readable singular name.
* @var string
*/
static $singular_name = null;
/**
* Human-readable pluaral name
* @var string
*/
static $plural_name = null;
/**
* Allow API access to this object?
* @todo Define the options that can be set here
*/
static $api_access = false;
/**
* 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 $isSingleton This this to true if this is a singleton() object, a stub for calling methods. Singletons
* don't have their defaults set.
*/
function __construct($record = null, $isSingleton = false) {
// Set the fields data.
if(!$record) {
$record = array("ID" => 0);
}
if(!is_array($record)) {
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 DataObject::get_one instead?", E_USER_WARNING);
$record = null;
}
$this->record = $this->original = $record;
// Keep track of the modification date of all the data sourced to make this page
// From this we create a Last-Modified HTTP header
if(isset($record['LastEdited'])) {
HTTP::register_modification_date($record['LastEdited']);
}
parent::__construct();
// Must be called after parent constructor
if(!$isSingleton && (!isset($this->record['ID']) || !$this->record['ID'])) {
$this->populateDefaults();
}
// prevent populateDefaults() and setField() from marking overwritten defaults as changed
$this->changed = array();
}
/**
* Destroy all of this objects dependant objects.
* You'll need to call this to get the memory of an object that has components or extensions freed.
*/
function destroy() {
$this->extension_instances = null;
$this->components = null;
$this->destroyed = true;
$this->flushCache();
}
/**
* Create a duplicate of this node.
* Caution: Doesn't duplicate relations.
*
* @param $doWrite Perform a write() operation before returning the object. If this is true, it will create the duplicate in the database.
* @return DataObject A duplicate of this node. The exact type will be the type of this node.
*/
function duplicate($doWrite = true) {
$className = $this->class;
$clone = new $className( $this->record );
$clone->ID = 0;
if($doWrite) $clone->write();
return $clone;
}
/**
* Set the ClassName attribute; $this->class is also updated.
*
* @param string $className The new ClassName attribute
*/
function setClassName($className) {
$this->class = trim($className);
$this->setField("ClassName", $className);
}
/**
* 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.
*
* @param string $newClassName The name of the new class
*
* @return DataObject The new instance of the new class, The exact type will be of the class name provided.
*/
function newClassInstance($newClassName) {
$newRecord = $this->record;
//$newRecord['RecordClassName'] = $newRecord['ClassName'] = $newClassName;
$newInstance = new $newClassName($newRecord);
$newInstance->setClassName($newClassName);
$newInstance->forceChange();
return $newInstance;
}
/**
* Adds methods from the extensions.
* Called by Object::__construct() once per class.
*/
function defineMethods() {
if($this->class == 'DataObject') return;
parent::defineMethods();
// Define the extra db fields
if($this->extension_instances) foreach($this->extension_instances as $i => $instance) {
$instance->loadExtraDBFields();
}
// Set up accessors for joined items
if($manyMany = $this->many_many()) {
foreach($manyMany as $relationship => $class) {
$this->addWrapperMethod($relationship, 'getManyManyComponents');
}
}
if($hasMany = $this->has_many()) {
foreach($hasMany as $relationship => $class) {
$this->addWrapperMethod($relationship, 'getComponents');
}
}
if($hasOne = $this->has_one()) {
foreach($hasOne as $relationship => $class) {
$this->addWrapperMethod($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 ($this->record && $this->record['ID'] > 0);
}
public function isEmpty(){
$isEmpty = true;
if($this->record){
foreach($this->record as $k=>$v){
if($k != "ID"){
$isEmpty = $isEmpty && !$v;
}
}
}
return $isEmpty;
}
/**
* 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
*/
function singular_name() {
$name = $this->stat('singular_name');
if(!$name) {
$name = ucwords(trim(strtolower(ereg_replace('([A-Z])',' \\1',$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
*
* NOTE:
* It uses as default text if no translation found the $add_action when
* defined or else the default text is singular_name()
*
* Translating string is in the form:
* $this->class.SINGULARNAME
* Example:
* Page.SINGULARNAME
*
* @return string User friendly translated singular name of this DataObject
*/
function i18n_singular_name()
{
$name = (!empty($this->add_action)) ? $this->add_action : $this->singular_name();
return _t($this->class.'.SINGULARNAME', $name);
}
/**
* Get the user friendly plural name of this DataObject
* If the name is not defined (by renaming $plural_name in the subclass),
* this returns a pluralised version of the class name.
*
* @return string User friendly plural name of this DataObject
*/
function plural_name() {
if($name = $this->stat('plural_name')) {
return $name;
} else {
$name = $this->singular_name();
if(substr($name,-1) == 'e') $name = substr($name,0,-1);
else if(substr($name,-1) == 'y') $name = substr($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
*/
function i18n_plural_name()
{
$name = $this->plural_name();
return _t($this->class.'.PLURALNAME', $name);
}
/**
* Standard implementation of a title/label for a specific
* record. Tries to find properties 'Title' or 'Name',
* and falls back to the 'ID'. Useful to provide
* user-friendly identification of a record, e.g. in errormessages
* or UI-selections.
*
* Overload this method to have a more specialized implementation,
* e.g. for an Address record this could be:
*
* public function getTitle() {
* return "{$this->StreetNumber} {$this->StreetName} {$this->City}";
* }
*
*
* @usedby {@link DataObjectSet->toDropDownMap()}
*
* @return string
*/
public function getTitle() {
if($this->hasField('Title')) return $this->getField('Title');
if($this->hasField('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() {
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 $data A map of field name to data values to update.
*/
public function update($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) {
$relObj = $relObj->$relation();
// If the intermediate relationship objects have been created, then write them
if($iID) $relObj->write();
} else {
user_error(
"DataObject::update(): Can't traverse relationship '$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();
$relObj->flushCache();
} else {
user_error("Couldn't follow dot syntax '$k' on '$this->class' object", E_USER_WARNING);
}
} else {
$this->$k = $v;
}
}
}
/**
* 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 $data A map of field name to data values to update.
*/
public function castedUpdate($data) {
foreach($data as $k => $v) {
$this->setCastedField($k,$v);
}
}
/**
* 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->customDatabaseFields();
$rightData = $rightObj->customDatabaseFields();
foreach($rightData as $key=>$rightVal) {
// 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 = $this->many_many()) {
foreach($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 = $this->has_many()) {
foreach($hasMany as $relationship => $class) {
$leftComponents = $leftObj->getComponents($relationship);
$rightComponents = $rightObj->getComponents($relationship);
if($rightComponents && $rightComponents->exists()) $leftComponents->addMany($rightComponents->column('ID'));
$leftComponents->write();
}
}
if($hasOne = $this->has_one()) {
foreach($hasOne as $relationship => $class) {
$leftComponent = $leftObj->getComponent($relationship);
$rightComponent = $rightObj->getComponent($relationship);
if($leftComponent->exists() && $rightComponent->exists() && $priority == 'right') {
$leftObj->{$relationship . 'ID'} = $rightObj->{$relationship . 'ID'};
}
}
}
}
return true;
}
/**
* Forces the record to think that all its data has changed.
* Doesn't write to the database.
*/
public function forceChange() {
foreach($this->record as $fieldName => $fieldVal)
$this->changed[$fieldName] = 1;
}
/**
* 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.
*
* 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 isnt'.
*
* @return A {@link ValidationResult} object
*/
protected function validate() {
return new ValidationResult();
}
/**
* 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.
*/
protected function onBeforeWrite() {
$this->brokenOnWrite = false;
$dummy = null;
$this->extend('augmentBeforeWrite', $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!
*/
protected function onAfterWrite() {
$dummy = null;
$this->extend('augmentAfterWrite', $dummy);
}
/**
* Used by onBeforeWrite() to ensure child classes call parent::onBeforeWrite()
* @var boolean
*/
protected $brokenOnWrite = false;
/**
* 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!
*/
protected function onBeforeDelete() {
$this->brokenOnDelete = false;
}
/**
* Used by onBeforeDelete() to ensure child classes call parent::onBeforeDelete()
* @var boolean
*/
protected $brokenOnDelete = false;
/**
* Load the default values in from the self::$defaults array.
* Will traverse the defaults of the current class and all its parent classes.
* Called by the constructor when creating new records.
*/
public function populateDefaults() {
$classes = array_reverse(ClassInfo::ancestry($this));
foreach($classes as $class) {
$singleton = ($class == $this->class) ? $this : singleton($class);
$defaults = $singleton->stat('defaults');
if($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) && $this->many_many($fieldName)) {
$manyManyJoin = $this->$fieldName();
$manyManyJoin->setByIdList($fieldValue);
}
}
if($class == 'DataObject') {
break;
}
}
}
/**
* 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.
* - Calls to {@link DataObjectLog} can be used to see everything that's been changed.
*
* @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 $writeComponents Call write() on all associated component instances which were previously
* retrieved through {@link getComponent()}, {@link getComponents()} or {@link getManyManyComponents()}
* (Default: false)
*
* @return int The ID of the record
*/
public function write($showDebug = false, $forceInsert = false, $forceWrite = false, $writeComponents = false) {
$firstWrite = false;
$this->brokenOnWrite = true;
$isNewRecord = false;
$valid = $this->validate();
if(!$valid->valid()) {
user_error("Validation error writing a $this->class object: " . $valid->message() . ". Object not written.", E_USER_WARNING);
return false;
}
$this->onBeforeWrite();
if($this->brokenOnWrite) {
user_error("$this->class has a broken onBeforeWrite() function. Make sure that you call parent::onBeforeWrite().", E_USER_ERROR);
}
// New record = everything has changed
if(($this->ID && is_numeric($this->ID)) && !$forceInsert) {
$dbCommand = 'update';
// Update the changed array with references to changed obj-fields
foreach($this->record as $k => $v) {
if(is_object($v) && $v->isChanged()) {
$this->changed[$k] = true;
}
}
} else{
$dbCommand = 'insert';
$this->changed = array();
foreach($this->record as $k => $v) {
$this->changed[$k] = 2;
}
$firstWrite = true;
}
// No changes made
if($this->changed) {
foreach($this->getClassAncestry() as $ancestor) {
if(ClassInfo::hasTable($ancestor))
$ancestry[] = $ancestor;
}
// Look for some changes to make
unset($this->changed['ID']);
$hasChanges = false;
foreach($this->changed as $fieldName => $changed) {
if($changed) {
$hasChanges = true;
break;
}
}
if($hasChanges || $forceWrite || !$this->record['ID']) {
// 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
if((!isset($this->record['ID']) || !$this->record['ID']) && isset($ancestry[0])) {
$baseTable = $ancestry[0];
DB::query("INSERT INTO `{$baseTable}` SET Created = NOW()");
$this->record['ID'] = DB::getGeneratedID($baseTable);
$this->changed['ID'] = 2;
$isNewRecord = true;
}
// Divvy up field saving into a number of database manipulations
$manipulation = array();
if(isset($ancestry) && is_array($ancestry)) {
foreach($ancestry as $idx => $class) {
$classSingleton = singleton($class);
foreach($this->record as $fieldName => $fieldValue) {
if(isset($this->changed[$fieldName]) && $this->changed[$fieldName] && $fieldType = $classSingleton->hasOwnTableDatabaseField($fieldName)) {
$fieldObj = $this->dbObject($fieldName);
if(!isset($manipulation[$class])) $manipulation[$class] = array();
// if database column doesn't correlate to a DBField instance...
if(!$fieldObj) {
$fieldObj = DBField::create('Varchar', $this->record[$fieldName], $fieldName);
}
// CompositeDBFields handle their own value storage; regular fields need to be
// re-populated from the database
if(!$fieldObj instanceof CompositeDBField) {
$fieldObj->setValue($this->record[$fieldName], $this->record);
}
$fieldObj->writeToManipulation($manipulation[$class]);
}
}
// Add the class name to the base object
if($idx == 0) {
$manipulation[$class]['fields']["LastEdited"] = "now()";
if($dbCommand == 'insert') {
$manipulation[$class]['fields']["Created"] = "now()";
//echo "$this->class - " .get_class($this);
$manipulation[$class]['fields']["ClassName"] = "'$this->class'";
}
}
// In cases where there are no fields, this 'stub' will get picked up on
if(ClassInfo::hasTable($class)) {
$manipulation[$class]['command'] = $dbCommand;
$manipulation[$class]['id'] = $this->record['ID'];
} else {
unset($manipulation[$class]);
}
}
}
$this->extend('augmentWrite', $manipulation);
// New records have their insert into the base data table done first, so that they can pass the
// generated ID on to the rest of the manipulation
if(isset($isNewRecord) && $isNewRecord && isset($manipulation[$baseTable])) {
$manipulation[$baseTable]['command'] = 'update';
}
DB::manipulate($manipulation);
if(isset($isNewRecord) && $isNewRecord) {
DataObjectLog::addedObject($this);
} else {
DataObjectLog::changedObject($this);
}
$this->onAfterWrite();
$this->changed = null;
} elseif ( $showDebug ) {
echo "Debug: no changes for DataObject
";
}
// Clears the cache for this object so get_one returns the correct object.
$this->flushCache();
if(!isset($this->record['Created'])) {
$this->record['Created'] = date('Y-m-d H:i:s');
}
$this->record['LastEdited'] = date('Y-m-d H:i:s');
}
// Write ComponentSets as necessary
if($writeComponents) {
$this->writeComponents(true);
}
return $this->record['ID'];
}
/**
* Write the cached components to the database. Cached components could refer to two different instances of the same record.
*
* @param $recursive Recursively write components
*/
public function writeComponents($recursive = false) {
if(!$this->components) return;
foreach($this->components as $component) {
$component->write(false, false, false, $recursive);
}
}
/**
* Gets all fields that written in the last write()-call
*
* @return array
*/
public function getLastWriteFields() {
return $this->lastWriteFields;
}
/**
* Perform a write without affecting the version table.
* On objects without versioning.
*
* @return int The ID of the record
*/
public function writeWithoutVersion() {
$this->changed['Version'] = 1;
if(!isset($this->record['Version'])) {
$this->record['Version'] = -1;
}
return $this->write();
}
/**
* Delete this data object.
* $this->onBeforeDelete() gets called.
* Note that in Versioned objects, both Stage and Live will be deleted.
*/
public function delete() {
$this->brokenOnDelete = true;
$this->onBeforeDelete();
if($this->brokenOnDelete) {
user_error("$this->class has a broken onBeforeDelete() function. Make sure that you call parent::onBeforeDelete().", E_USER_ERROR);
}
foreach($this->getClassAncestry() as $ancestor) {
if(ClassInfo::hastable($ancestor)) {
$sql = new SQLQuery();
$sql->delete = true;
$sql->from[$ancestor] = "`$ancestor`";
$sql->where[] = "ID = $this->ID";
$this->extend('augmentSQL', $sql);
$sql->execute();
}
}
$this->OldID = $this->ID;
$this->ID = 0;
DataObjectLog::deletedObject($this);
}
/**
* 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);
}
}
/**
* A cache used by getClassAncestry()
* @var array
*/
protected static $ancestry;
/**
* Get the class ancestry, including the current class name.
* The ancestry will be returned as an array of class names, where the 0th element
* will be the class that inherits directly from DataObject, and the last element
* will be the current class.
*
* @return array Class ancestry
*/
public function getClassAncestry() {
if(!isset(DataObject::$ancestry[$this->class])) {
DataObject::$ancestry[$this->class] = array($this->class);
while(($class = get_parent_class(DataObject::$ancestry[$this->class][0])) != "DataObject") {
array_unshift(DataObject::$ancestry[$this->class], $class);
}
}
return DataObject::$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.
*
* @param string $componentName Name of the component
*
* @return DataObject The component object. It's exact type will be that of the component.
*/
public function getComponent($componentName) {
if(isset($this->components[$componentName])) {
return $this->components[$componentName];
}
if($componentClass = $this->has_one($componentName)) {
$childID = $this->getField($componentName . 'ID');
if($childID && is_numeric($childID)) {
$component = DataObject::get_by_id($componentClass,$childID);
}
// If no component exists, create placeholder object
if(!isset($component)) {
$component = $this->createComponent($componentName);
// We may have had an orphaned ID that needs to be cleaned up
$this->setField($componentName . 'ID', 0);
}
// If no component exists, create placeholder object
if(!$component) {
$component = $this->createComponent($componentName);
}
$this->components[$componentName] = $component;
return $component;
} else {
user_error("DataObject::getComponent(): Unknown 1-to-1 component '$componentName' on class '$this->class'", E_USER_ERROR);
}
}
/**
* A cache used by component getting classes
* @var array
*/
protected $componentCache;
/**
* Returns a one-to-many component, as a ComponentSet.
*
* @param string $componentName Name of the component
* @param string $filter A filter to be inserted into the WHERE clause
* @param string|array $sort A sort expression to be inserted into the ORDER BY clause. If omitted, the static field $default_sort on the component class will be used.
* @param string $join A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @param string|array $limit A limit expression to be inserted into the LIMIT clause
*
* @return ComponentSet The components of the one-to-many relationship.
*/
public function getComponents($componentName, $filter = "", $sort = "", $join = "", $limit = "") {
$result = null;
$sum = md5("{$filter}_{$sort}_{$join}_{$limit}");
if(isset($this->componentCache[$componentName . '_' . $sum]) && false != $this->componentCache[$componentName . '_' . $sum]) {
return $this->componentCache[$componentName . '_' . $sum];
}
if(!$componentClass = $this->has_many($componentName)) {
user_error("DataObject::getComponents(): Unknown 1-to-many component '$componentName' on class '$this->class'", E_USER_ERROR);
}
$joinField = $this->getComponentJoinField($componentName);
if($this->isInDB()) { //Check to see whether we should query the db
$query = $this->getComponentsQuery($componentName, $filter, $sort, $join, $limit);
$result = $this->buildDataObjectSet($query->execute(), 'ComponentSet', $query, $componentClass);
if($result) $result->parseQueryLimit($query);
}
if(!$result) {
// If this record isn't in the database, then we want to hold onto this specific ComponentSet,
// because it's the only copy of the data that we have.
$result = new ComponentSet();
$this->setComponent($componentName . '_' . $sum, $result);
}
$result->setComponentInfo("1-to-many", $this, null, null, $componentClass, $joinField);
return $result;
}
/**
* Get the query object for a $has_many Component.
*
* Use {@link DataObjectSet->setComponentInfo()} to attach metadata to the
* resultset you're building with this query.
* Use {@link DataObject->buildDataObjectSet()} to build a set out of the {@link SQLQuery}
* object, and pass "ComponentSet" as a $containerClass.
*
* @param string $componentName
* @param string $filter
* @param string|array $sort
* @param string $join
* @param string|array $limit
* @return SQLQuery
*/
public function getComponentsQuery($componentName, $filter = "", $sort = "", $join = "", $limit = "") {
if(!$componentClass = $this->has_many($componentName)) {
user_error("DataObject::getComponentsQuery(): Unknown 1-to-many component '$componentName' on class '$this->class'", E_USER_ERROR);
}
$joinField = $this->getComponentJoinField($componentName);
$id = $this->getField("ID");
// get filter
$combinedFilter = "$joinField = '$id'";
if($filter) $combinedFilter .= " AND {$filter}";
return singleton($componentClass)->extendedSQL($combinedFilter, $sort, $limit, $join);
}
/**
* Tries to find the db-key for storing a relation (defaults to "ParentID" if no relation is found).
* The iteration is necessary because the most specific class does not always have a database-table.
*
* @param string $componentName Name of one to many component
*
* @return string Fieldname for the parent-relation
*/
public function getComponentJoinField($componentName) {
if(!$componentClass = $this->has_many($componentName)) {
user_error("DataObject::getComponents(): Unknown 1-to-many component '$componentName' on class '$this->class'", E_USER_ERROR);
}
$componentObj = singleton($componentClass);
// get has-one relations
$reversedComponentRelations = array_flip($componentObj->has_one());
// get all parentclasses for the current class which have tables
$allClasses = ClassInfo::ancestry($this->class);
// use most specific relation by default (turn around order)
$allClasses = array_reverse($allClasses);
// traverse up through all classes with database-tables, starting with the most specific
// (mostly the classname of the calling DataObject)
foreach($allClasses as $class) {
// if this class does a "has-one"-representation, use it
if(isset($reversedComponentRelations[$class]) && false != $reversedComponentRelations[$class]) {
$joinField = $reversedComponentRelations[$class] . 'ID';
break;
}
}
if(!isset($joinField)) {
$joinField = 'ParentID';
}
return $joinField;
}
/**
* Sets the component of a relationship.
*
* @param string $componentName Name of the component
* @param DataObject|ComponentSet $componentValue Value of the component
*/
public function setComponent($componentName, $componentValue) {
$this->componentCache[$componentName] = $componentValue;
}
/**
* Returns a many-to-many component, as a ComponentSet.
* @param string $componentName Name of the many-many component
* @return ComponentSet The set of components
*
* @todo Implement query-params
*/
public function getManyManyComponents($componentName, $filter = "", $sort = "", $join = "", $limit = "") {
$sum = md5("{$filter}_{$sort}_{$join}_{$limit}");
if(isset($this->componentCache[$componentName . '_' . $sum]) && false != $this->componentCache[$componentName . '_' . $sum]) {
return $this->componentCache[$componentName . '_' . $sum];
}
list($parentClass, $componentClass, $parentField, $componentField, $table) = $this->many_many($componentName);
// Join expression is done on SiteTree.ID even if we link to Page; it helps work around
// database inconsistencies
$componentBaseClass = ClassInfo::baseDataClass($componentClass);
if($this->ID && is_numeric($this->ID)) {
if($componentClass) {
$query = $this->getManyManyComponentsQuery($componentName, $filter, $sort, $join, $limit);
$records = $query->execute();
$result = $this->buildDataObjectSet($records, "ComponentSet", $query, $componentBaseClass);
if($result) $result->parseQueryLimit($query); // for pagination support
if(!$result) {
$result = new ComponentSet();
}
}
} else {
$result = new ComponentSet();
}
$result->setComponentInfo("many-to-many", $this, $parentClass, $table, $componentClass);
// If this record isn't in the database, then we want to hold onto this specific ComponentSet,
// because it's the only copy of the data that we have.
if(!$this->isInDB()) {
$this->setComponent($componentName . '_' . $sum, $result);
}
return $result;
}
/**
* Get the query object for a $many_many Component.
* Use {@link DataObjectSet->setComponentInfo()} to attach metadata to the
* resultset you're building with this query.
* Use {@link DataObject->buildDataObjectSet()} to build a set out of the {@link SQLQuery}
* object, and pass "ComponentSet" as a $containerClass.
*
* @param string $componentName
* @param string $filter
* @param string|array $sort
* @param string $join
* @param string|array $limit
* @return SQLQuery
*/
public function getManyManyComponentsQuery($componentName, $filter = "", $sort = "", $join = "", $limit = "") {
list($parentClass, $componentClass, $parentField, $componentField, $table) = $this->many_many($componentName);
$componentObj = singleton($componentClass);
// Join expression is done on SiteTree.ID even if we link to Page; it helps work around
// database inconsistencies
$componentBaseClass = ClassInfo::baseDataClass($componentClass);
$query = $componentObj->extendedSQL(
"`$table`.$parentField = $this->ID", // filter
$sort,
$limit,
"INNER JOIN `$table` ON `$table`.$componentField = `$componentBaseClass`.ID" // join
);
array_unshift($query->select, "`$table`.*");
// FIXME: We were having database crashing troubles with GIS content being accessed from with the link
// tracking join. In order to fix it, we're altering the query just for this many-many relation.
// The more long-term fix to this is to let developers specify which data columns they are actually interested
// in, and thereby optimise the query in a more loosely coupled fashion.
if($table == "SiteTree_LinkTracking") {
$filteredSelect = array();
foreach($query->select as $item) {
if(strpos($item,'SiteTree') !== false) $filteredSelect[] = $item;
}
$query->select = $filteredSelect;
$query->from = array(
"SiteTree" => $query->from["SiteTree"],
$query->from[0],
);
}
if($filter) $query->where[] = $filter;
if($join) $query->from[] = $join;
return $query;
}
/**
* Creates an empty component for the given one-one or one-many relationship
*
* @param string $componentName
*
* @return DataObject The empty component. The exact class will be that of the components class.
*/
protected function createComponent($componentName) {
if(($componentClass = $this->has_one($componentName)) || ($componentClass = $this->has_many($componentName))) {
$component = new $componentClass(null);
return $component;
} else {
user_error("DataObject::createComponent(): Unknown 1-to-1 or 1-to-many component '$componentName' on class '$this->class'", E_USER_ERROR);
}
}
/**
* Add the scaffold-generated relation fields to the given field set
*/
protected function addScaffoldRelationFields($fieldSet) {
if ($this->has_many() || $this->many_many()) {
$oldFields = $fieldSet;
$fieldSet = new FieldSet(
new TabSet("Root", new Tab("Main"))
);
foreach($oldFields as $field) {
$fieldSet->addFieldToTab("Root.Main", $field);
}
}
if($this->has_many()) {
// Add each relation as a separate tab
foreach($this->has_many() as $relationship => $component) {
$relationshipFields = singleton($component)->summaryFields();
$foreignKey = $this->getComponentJoinField($relationship);
$ctf = new ComplexTableField(
$this,
$relationship,
$component,
$relationshipFields,
"getCMSFields",
"$foreignKey = $this->ID"
);
$ctf->setPermissions(TableListField::permissions_for_object($component));
$fieldSet->addFieldToTab("Root.$relationship", $ctf);
}
}
if ($this->many_many()) {
foreach($this->many_many() as $relationship => $component) {
$relationshipFields = singleton($component)->summaryFields();
$filterWhere = $this->getManyManyFilter($relationship, $component);
$filterJoin = $this->getManyManyJoin($relationship, $component);
$ctf = new ComplexTableField(
$this,
$relationship,
$component,
$relationshipFields,
"getCMSFields",
$filterWhere,
'',
$filterJoin
);
$ctf->setPermissions(TableListField::permissions_for_object($component));
$ctf->popupClass = "ScaffoldingComplexTableField_Popup";
$fieldSet->addFieldToTab("Root.$relationship", $ctf);
}
}
return $fieldSet;
}
/**
* Pull out a join clause for a many-many relationship.
*
* @param string $componentName The many_many or belongs_many_many relation to join to.
* @param string $baseTable The classtable that will already be included in the SQL query to which this join will be added.
* @return string SQL join clause
*/
function getManyManyJoin($componentName, $baseTable) {
if(!$componentClass = $this->many_many($componentName)) {
user_error("DataObject::getComponents(): Unknown many-to-many component '$componentName' on class '$this->class'", E_USER_ERROR);
}
$classes = array_reverse(ClassInfo::ancestry($this->class));
list($parentClass, $componentClass, $parentField, $componentField, $table) = $this->many_many($componentName);
if($baseTable == $parentClass) {
return "LEFT JOIN `$table` ON (`$table`.`$parentField` = `$parentClass`.`ID` AND `$table`.`$componentField` = '{$this->ID}')";
} else {
return "LEFT JOIN `$table` ON (`$table`.`$componentField` = `$componentClass`.`ID` AND `$table`.`$parentField` = '{$this->ID}')";
}
}
function getManyManyFilter($componentName, $baseTable) {
list($parentClass, $componentClass, $parentField, $componentField, $table) = $this->many_many($componentName);
return "`$table`.`$parentField` = '{$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.
*
* @param string $component Name of component
*
* @return string|array The class of the one-to-one component, or an array of all one-to-one components and their classes.
*/
public function has_one($component = null) {
$classes = ClassInfo::ancestry($this);
foreach($classes as $class) {
// Wait until after we reach DataObject
if(in_array($class, array('Object', 'ViewableData', 'DataObject'))) continue;
if($component) {
$candidate = eval("return isset({$class}::\$has_one[\$component]) ? {$class}::\$has_one[\$component] : null;");
if($candidate) {
return $candidate;
}
} else {
eval("\$items = isset(\$items) ? array_merge((array){$class}::\$has_one, (array)\$items) : (array){$class}::\$has_one;");
}
}
return isset($items) ? $items : null;
}
/**
* Return all of the database fields defined in self::$db and all the parent classes.
* Doesn't include any fields specified by self::$has_one. Use $this->has_one() to get these fields
*
* @return array The database fields
*/
public function db($component = null) {
$classes = ClassInfo::ancestry($this);
$good = false;
$items = array();
foreach($classes as $class) {
// Wait until after we reach DataObject
if(!$good) {
if($class == 'DataObject') {
$good = true;
}
continue;
}
if($component) {
$candidate = eval("return isset({$class}::\$db[\$component]) ? {$class}::\$db[\$component] : null;");
if($candidate) {
return $candidate;
}
} else {
eval("\$items = array_merge((array)\$items, (array){$class}::\$db);");
}
}
return $items;
}
/**
* Return the class of a one-to-many component. If $component is null, return all of the one-to-many components
* and their classes.
*
* @param string $component Name of component
*
* @return string|array The class of the one-to-many component, or an array of all one-to-many components and their classes.
*/
public function has_many($component = null) {
$classes = ClassInfo::ancestry($this);
foreach($classes as $class) {
if(in_array($class, array('ViewableData', 'Object', 'DataObject'))) continue;
if($component) {
$candidate = eval("return isset({$class}::\$has_many[\$component]) ? {$class}::\$has_many[\$component] : null;");
$candidate = eval("if ( isset({$class}::\$has_many[\$component]) ) { return {$class}::\$has_many[\$component]; } else { return false; }");
if($candidate) {
return $candidate;
}
} else {
eval("\$items = isset(\$items) ? array_merge((array){$class}::\$has_many, (array)\$items) : (array){$class}::\$has_many;");
}
}
return isset($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.
*
* @param string $component Name of component
*
* @return array An array of (parentclass, childclass), or an array of all many-many components
*/
public function many_many($component = null) {
$classes = ClassInfo::ancestry($this);
foreach($classes as $class) {
// Wait until after we reach DataObject
if(in_array($class, array('ViewableData', 'Object', 'DataObject'))) continue;
if($component) {
$manyMany = singleton($class)->stat('many_many');
// Try many_many
$candidate = (isset($manyMany[$component])) ? $manyMany[$component] : null;
if($candidate) {
$parentField = $class . "ID";
$childField = ($class == $candidate) ? "ChildID" : $candidate . "ID";
return array($class, $candidate, $parentField, $childField, "{$class}_$component");
}
// Try belongs_many_many
$belongsManyMany = singleton($class)->stat('belongs_many_many');
$candidate = (isset($belongsManyMany[$component])) ? $belongsManyMany[$component] : null;
if($candidate) {
$childField = $candidate . "ID";
// We need to find the inverse component name
$otherManyMany = singleton($candidate)->stat('many_many');
if(!$otherManyMany) {
user_error("Inverse component of $candidate not found ({$this->class})", E_USER_ERROR);
}
foreach($otherManyMany as $inverseComponentName => $candidateClass) {
if($candidateClass == $class || is_subclass_of($class, $candidateClass)) {
$parentField = ($class == $candidate) ? "ChildID" : $candidateClass . "ID";
// HACK HACK HACK!
if($component == 'NestedProducts') {
$parentField = $candidateClass . "ID";
}
return array($class, $candidate, $parentField, $childField, "{$candidate}_$inverseComponentName");
}
}
user_error("Orphaned \$belongs_many_many value for $this->class.$component", E_USER_ERROR);
}
} else {
eval("\$items = isset(\$items) ? array_merge((array){$class}::\$many_many, (array)\$items) : (array){$class}::\$many_many;");
eval("\$items = array_merge((array){$class}::\$belongs_many_many, (array)\$items);");
}
}
return isset($items) ? $items : null;
}
/**
* Generates a SearchContext to be used for building and processing
* a generic search form for properties on this object.
*
* @usedby {@link ModelAdmin}
* @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.
*
* @usedby {@link SearchContext}
* @return FieldSet
*/
public function scaffoldSearchFields() {
$fields = new FieldSet();
foreach($this->searchableFields() as $fieldName => $spec) {
// If we explicitly set a field, then construct that
if(isset($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();
}
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 DBField::scaffoldFormField()
* @uses DataObject::fieldLabels()
* @param array $fieldClasses Optional mapping of fieldnames to subclasses of {@link DBField}
* @return FieldSet
*/
public function scaffoldFormFields($fieldClasses = null) {
$fields = new FieldSet();
$fields->push(new HeaderField($this->singular_name()));
foreach($this->db() as $fieldName => $fieldType) {
// @todo Pass localized title
if(isset($fieldClasses[$fieldName])) {
$fieldClass = $fieldClasses[$fieldName];
$fieldObject = new $fieldClass($fieldName);
} else {
$fieldObject = $this->dbObject($fieldName)->scaffoldFormField();
}
$fieldObject->setTitle($this->fieldLabels($fieldName));
$fields->push($fieldObject);
}
foreach($this->has_one() as $relationship => $component) {
$model = singleton($component);
$records = DataObject::get($component);
$collect = ($model->hasMethod('customSelectOption')) ? 'customSelectOption' : current($model->summaryFields());
$options = $records ? $records->filter_map('ID', $collect) : array();
$fields->push(new DropdownField($relationship.'ID', $relationship, $options));
}
return $fields;
}
/**
* Centerpiece of every data administration interface in Silverstripe,
* which returns a {@link FieldSet} suitable for a {@link Form} object.
* If not overloaded, we're using {@link scaffoldFormFields()} to automatically
* generate this set.
*
*
* klass MyCustomClass extends DataObject {
* static $db = array('CustomProperty'=>'Boolean');
*
* public function getCMSFields() {
* $fields = parent::getCMSFields();
* $fields->push(new CheckboxField('CustomProperty'));
* return $fields;
* }
* }
*
*
* @see Good example of complex FormField building: SiteTree::getCMSFields()
*
* @return FieldSet
*/
public function getCMSFields() {
$fields = $this->scaffoldFormFields();
// If we don't have an ID, then relation fields don't work
if($this->ID) {
$fields = $this->addScaffoldRelationFields($fields);
}
return $fields;
}
/**
* Checks if the given fields have been filled out.
* Pass this method a number of field names, it will return true if they all have values.
*
* @param array|string $args,... The field names may be passed either as an array, or as multiple parameters.
*
* @return boolean True if all fields have values, otherwise false
*/
public function filledOut($args) {
// Field names can be passed as arguments or an array
if(!is_array($args)) $args = func_get_args();
foreach($args as $arg) {
if(!$this->$arg) {
return false;
}
}
return true;
}
/**
* Gets the value of a field.
* Called by {@link __get()} and any getFieldName() methods you might create.
*
* @param string $field The name of the field
*
* @return mixed The field value
*/
protected function getField($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];
// Otherwise, we need to determine if this is a complex field
$fieldClass = $this->db($field);
if($fieldClass && ClassInfo::classImplements($fieldClass, 'CompositeDBField')) {
$helperPair = $this->castingHelperPair($field);
$constructor = $helperPair['castingHelper'];
$fieldName = $field;
$fieldObj = eval($constructor);
if(isset($this->record[$field])) $fieldObj->setValue($this->record[$field], $this->record);
$this->record[$field] = $fieldObj;
return $this->record[$field];
}
return isset($this->record[$field]) ? $this->record[$field] : null;
}
/**
* Return a map of all the fields for this record.
*
* @return array A map of field names to field values.
*/
public function getAllFields() {
return $this->record;
}
/**
* Return the fields that have changed.
* The change level affects what the functions defines as "changed":
* Level 1 will return strict changes, even !== ones.
* Level 2 is more lenient, it will onlr 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' => 2)
* )
*
*
* @param boolean $databaseFieldsOnly Get only database fields that have changed
* @param int $changeLevel The strictness of what is defined as change
* @return array
*/
public function getChangedFields($databaseFieldsOnly = false, $changeLevel = 1) {
$changedFields = array();
if($databaseFieldsOnly) {
$customDatabaseFields = $this->customDatabaseFields();
$fields = array_intersect_key($this->changed, $customDatabaseFields);
} else {
$fields = $this->changed;
}
// Filter the list to those of a certain change level
if($changeLevel > 1) {
foreach($fields as $name => $level) {
if($level < $changeLevel) {
unset($fields[$name]);
}
}
}
if ($fields) foreach($fields as $name => $level) {
if(!isset($this->original[$name])) continue;
$changedFields[$name] = array(
'before' => $this->original[$name],
'after' => $this->record[$name],
'level' => $level
);
}
return $changedFields;
}
/**
* 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 $val New field value
*/
function setField($fieldName, $val) {
// Situation 1: Passing a DBField
if($val instanceof DBField) {
$val->Name = $fieldName;
$this->record[$fieldName] = $val;
// Situation 2: Passing a literal
} else {
$defaults = $this->stat('defaults');
// if a field is not existing or has strictly changed
if(!isset($this->record[$fieldName]) || $this->record[$fieldName] !== $val) {
// TODO Add check for php-level defaults which are not set in the db
// TODO Add check for hidden input-fields (readonly) which are not set in the db
if(
// Main non type-based check
(isset($this->record[$fieldName]) && $this->record[$fieldName] != $val)
) {
// Non-strict check fails, so value really changed, e.g. "abc" != "cde"
$this->changed[$fieldName] = 2;
} else {
// Record change-level 1 if only the type changed, e.g. 0 !== NULL
$this->changed[$fieldName] = 1;
}
// value is always saved back when strict check succeeds
$this->record[$fieldName] = $val;
}
}
}
/**
* 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 $value New field value
*/
public function setCastedField($fieldName, $val) {
if(!$fieldName) {
user_error("DataObject::setCastedField: Called without a fieldName", E_USER_ERROR);
}
$castingHelper = $this->castingHelper($fieldName);
if($castingHelper) {
$fieldObj = eval($castingHelper);
$fieldObj->setValue($val);
$fieldObj->saveInto($this);
} else {
$this->$fieldName = $val;
}
}
/**
* Returns true if the given field exists
*
* @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) || $this->hasOwnTableDatabaseField($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 array_key_exists($field, $this->databaseFields());
}
/**
* 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) {
// Add base fields which are not defined in static $db
if($field == "ID") return "Int";
if($field == "ClassName" && get_parent_class($this) == "DataObject") return "Enum";
if($field == "LastEdited" && get_parent_class($this) == "DataObject") return "Datetime";
if($field == "Created" && get_parent_class($this) == "DataObject") return "Datetime";
// Add fields from Versioned decorator
if($field == "Version") return $this->hasExtension('Versioned') ? "Int" : false;
// get cached fieldmap
$fieldMap = $this->uninherited('_cache_hasOwnTableDatabaseField');
// if no fieldmap is cached, get all fields
if(!$fieldMap) {
// all $db fields on this specific class (no parents)
$fieldMap = $this->uninherited('db', true);
// all has_one relations on this specific class,
// add foreign key
$hasOne = $this->uninherited('has_one', true);
if($hasOne) foreach($hasOne as $fieldName => $fieldSchema) {
$fieldMap[$fieldName . 'ID'] = "Int";
}
// set cached fieldmap
$this->set_uninherited('_cache_hasOwnTableDatabaseField', $fieldMap);
}
// Remove string-based "constructor-arguments" from the DBField definition
return isset($fieldMap[$field]) ? strtok($fieldMap[$field],'(') : null;
}
/**
* Returns true if the member is allowed to do the given action.
*
* @param string $perm The permission to be checked, such as 'View'.
* @param Member $member The member whose permissions need checking. Defaults to the currently logged
* in user.
*
* @return boolean True if the the member is allowed to do the given action
*/
function can($perm, $member = null) {
if(!isset($member)) {
$member = Member::currentUser();
}
if($member && $member->isAdmin()) {
return true;
}
if($this->many_many('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();
} else {
$groups = DataObject::get("Group_Unsecure", "");
}
$groupList = implode(', ', $groups->column("ID"));
$query = new SQLQuery(
"`Page_Can$perm`.PageID",
array("`Page_Can$perm`"),
"GroupID IN ($groupList)");
$permissionCache[$memberID][$perm] = $query->execute()->column();
if($perm == "View") {
$query = new SQLQuery("`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;
}
}
$this->set_uninherited('permissionCache', $permissionCache);
}
if($permissionCache[$memberID][$perm]) {
return in_array($this->ID, $permissionCache[$memberID][$perm]);
}
}
} else {
return parent::can($perm, $member);
}
}
/**
* @param Member $member
* @return boolean
*/
public function canView($member = null) {
return Permission::check('ADMIN', 'any', $member);
}
/**
* @param Member $member
* @return boolean
*/
public function canEdit($member = null) {
return Permission::check('ADMIN', 'any', $member);
}
/**
* @param Member $member
* @return boolean
*/
public function canDelete($member = null) {
return Permission::check('ADMIN', 'any', $member);
}
/**
* @todo Should canCreate be a static method?
*
* @param Member $member
* @return boolean
*/
public function canCreate($member = null) {
return Permission::check('ADMIN', 'any', $member);;
}
/**
* Debugging used by Debug::show()
*
* @return string HTML data representing this object
*/
public function debug() {
$val = "Database record: $this->class
";
if($this->record) foreach($this->record as $fieldName => $fieldVal) {
$val .= "- $fieldName : " . Debug::text($fieldVal) . "
";
}
$val .= "
";
return $val;
}
/**
* @deprecated 2.3 (For external use) Please use hasField(), hasDatabaseField(), hasOwnTableDatabaseField() instead
*
* @param string $field Name of the field
* @return string The field type of the given field
*/
public function fieldExists($field) {
return $this->hasOwnTableDatabaseField($field);
}
/**
* 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) {
// If we have a CompositeDBField object in $this->record, then return that
if(isset($this->record[$fieldName]) && is_object($this->record[$fieldName])) {
return $this->record[$fieldName];
// Special case for ID field
} else if($fieldName == 'ID') {
return new PrimaryKey($fieldName, $this);
// General casting information for items in $db or $casting
} else if($helperPair = $this->castingHelperPair($fieldName)) {
$constructor = $helperPair['castingHelper'];
$obj = eval($constructor);
$obj->setValue($this->$fieldName, $this->record);
return $obj;
// Special case for has_one relationships
} else if(preg_match('/ID$/', $fieldName) && $this->has_one(substr($fieldName,0,-2))) {
return DBField::create('Int', $this->record[$fieldName], $fieldName);
}
}
/**
* 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 $fieldPath string
* @return DBField
*/
public function relObject($fieldPath) {
$parts = explode('.', $fieldPath);
$fieldName = array_pop($parts);
$component = $this;
foreach($parts as $relation) {
if ($rel = $component->has_one($relation)) {
$component = singleton($rel);
} elseif ($rel = $component->has_many($relation)) {
$component = singleton($rel);
} elseif ($rel = $component->many_many($relation)) {
$component = singleton($rel[1]);
}
}
$object = $component->dbObject($fieldName);
if (!($object instanceof DBField) && !($object instanceof ComponentSet)) {
user_error("Unable to traverse to related object field [$fieldPath] on [$this->class]", E_USER_ERROR);
}
return $object;
}
/**
* Temporary hack to return an association name, based on class, to get around the mangle
* of having to deal with reverse lookup of relationships to determine autogenerated foreign keys.
*
* @return String
*/
public function getReverseAssociation($className) {
if (is_array($this->many_many())) {
$many_many = array_flip($this->many_many());
if (array_key_exists($className, $many_many)) return $many_many[$className];
}
if (is_array($this->has_many())) {
$has_many = array_flip($this->has_many());
if (array_key_exists($className, $has_many)) return $has_many[$className];
}
if (is_array($this->has_one())) {
$has_one = array_flip($this->has_one());
if (array_key_exists($className, $has_one)) return $has_one[$className];
}
return false;
}
/**
* Build a {@link SQLQuery} object to perform the given query.
*
* @param string $filter A filter to be inserted into the WHERE clause.
* @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|array $limit A limit expression to be inserted into the LIMIT clause.
* @param string $join A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @param boolean $restictClasses Restrict results to only objects of either this class of a subclass of this class
* @param string $having A filter to be inserted into the HAVING clause.
*
* @return SQLQuery Query built.
*/
public function buildSQL($filter = "", $sort = "", $limit = "", $join = "", $restrictClasses = true, $having = "") {
// Find a default sort
if(!$sort) {
$sort = $this->stat('default_sort');
}
// Get the tables to join to
$tableClasses = ClassInfo::dataClassesFor($this->class);
if(!$tableClasses) {
user_error("DataObject::buildSQL: Can't find data classes (classes linked to tables) for $this->class", E_USER_ERROR);
}
$baseClass = array_shift($tableClasses);
$select = array("`$baseClass`.*");
// Build our intial query
$query = new SQLQuery($select);
$query->from("`$baseClass`");
$query->where($filter);
$query->orderby($sort);
$query->limit($limit);
// Add SQL for multi-value fields on the base table
$databaseFields = $this->databaseFields();
if($databaseFields) foreach($databaseFields as $k => $v) {
if(!in_array($k, array('ClassName', 'LastEdited', 'Created'))) {
if(ClassInfo::classImplements($v, 'CompositeDBField')) {
$this->dbObject($k)->addToQuery($query);
}
}
}
// Join all the tables
if($tableClasses && self::$subclass_access) {
foreach($tableClasses as $tableClass) {
$query->from[$tableClass] = "LEFT JOIN `$tableClass` ON `$tableClass`.ID = `$baseClass`.ID";
$query->select[] = "`$tableClass`.*";
// Add SQL for multi-value fields
$SNG = singleton($tableClass);
$databaseFields = $SNG->databaseFields();
if($databaseFields) foreach($databaseFields as $k => $v) {
if(!in_array($k, array('ClassName', 'LastEdited', 'Created'))) {
if(ClassInfo::classImplements($v, 'CompositeDBField')) {
$SNG->dbObject($k)->addToQuery($query);
}
}
}
}
}
$query->select[] = "`$baseClass`.ID";
$query->select[] = "if(`$baseClass`.ClassName,`$baseClass`.ClassName,'$baseClass') AS RecordClassName";
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
// If querying the base class, don't bother filtering on class name
if($restrictClasses && $this->class != $baseClass) {
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
$query->where[] = "`$baseClass`.ClassName IN ('" . implode("','", $classNames) . "')";
}
if($having) {
$query->having[] = $having;
}
if($join) {
$query->from[] = $join;
$query->groupby[] = reset($query->from) . ".ID";
}
return $query;
}
/**
* Like {@link buildSQL}, but applies the extension modifications.
*
* @param string $filter A filter to be inserted into the WHERE clause.
* @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|array $limit A limit expression to be inserted into the LIMIT clause.
* @param string $join A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @param string $having A filter to be inserted into the HAVING clause.
*
* @return SQLQuery Query built
*/
public function extendedSQL($filter = "", $sort = "", $limit = "", $join = "", $having = ""){
$query = $this->buildSQL($filter, $sort, $limit, $join, true, $having);
$this->extend('augmentSQL', $query);
return $query;
}
/**
* Get a bunch of fields in an HTML LI, like this:
* - name: value
* - name: value
* - name: value
*
* @deprecated 2.3 Use custom code
* @return string The fields as an HTML unordered list
*/
function listOfFields() {
$fields = func_get_args();
$result = "\n";
foreach($fields as $field)
$result .= "- $field: " . $this->$field . "
\n";
$result .= "
";
return $result;
}
/**
* 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 $filter A filter to be inserted into the WHERE clause.
* @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 A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @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.
*
* @return mixed The objects matching the filter, in the class specified by $containerClass
*/
public static function get($callerClass, $filter = "", $sort = "", $join = "", $limit = "", $containerClass = "DataObjectSet") {
return singleton($callerClass)->instance_get($filter, $sort, $join, $limit, $containerClass);
}
/**
* The internal function that actually performs the querying for get().
* DataObject::get("Table","filter") is the same as singleton("Table")->instance_get("filter")
*
* @param string $filter A filter to be inserted into the WHERE clause.
* @param string $sort A sort expression to be inserted into the ORDER BY clause. If omitted, self::$default_sort will be used.
* @param string $join A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @param string $limit A limit expression to be inserted into the LIMIT clause.
* @param string $containerClass The container class to return the results in.
*
* @return mixed The objects matching the filter, in the class specified by $containerClass
*/
public function instance_get($filter = "", $sort = "", $join = "", $limit="", $containerClass = "DataObjectSet") {
$query = $this->extendedSQL($filter, $sort, $limit, $join);
$records = $query->execute();
$ret = $this->buildDataObjectSet($records, $containerClass, $query, $this->class);
if($ret) $ret->parseQueryLimit($query);
return $ret;
}
/**
* Take a database {@link Query} and instanciate an object for each record.
*
* @param Query|array $records The database records, a {@link Query} object or an array of maps.
* @param string $containerClass The class to place all of the objects into.
*
* @return mixed The new objects in an object of type $containerClass
*/
function buildDataObjectSet($records, $containerClass = "DataObjectSet", $query = null, $baseClass = null) {
foreach($records as $record) {
if(!$record['RecordClassName']) {
$record['RecordClassName'] = $record['ClassName'];
}
if(class_exists($record['RecordClassName'])) {
$results[] = new $record['RecordClassName']($record);
} else {
$results[] = new $baseClass($record);
}
}
if(isset($results)) {
return new $containerClass($results);
}
}
/**
* A cache used by get_one.
* @var array
*/
protected static $cache_get_one;
/**
* 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 $filter A filter to be inserted into the WHERE clause
* @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 = "") {
$sum = md5("{$filter}_{$orderby}");
// Flush destroyed items out of the cache
if($cache && isset(DataObject::$cache_get_one[$callerClass][$sum]) && DataObject::$cache_get_one[$callerClass][$sum] instanceof DataObject && DataObject::$cache_get_one[$callerClass][$sum]->destroyed) {
DataObject::$cache_get_one[$callerClass][$sum] = false;
}
if(!$cache || !isset(DataObject::$cache_get_one[$callerClass][$sum])) {
$item = singleton($callerClass)->instance_get_one($filter, $orderby);
if($cache) {
DataObject::$cache_get_one[$callerClass][$sum] = $item;
if(!DataObject::$cache_get_one[$callerClass][$sum]) {
DataObject::$cache_get_one[$callerClass][$sum] = false;
}
}
}
return $cache ? DataObject::$cache_get_one[$callerClass][$sum] : $item;
}
/**
* Flush the cached results for all relations (has_one, has_many, many_many)
*/
public function flushCache() {
if($this->class == 'DataObject') {
DataObject::$cache_get_one = array();
return;
}
if(!self::$cache_get_one) return;
$classes = ClassInfo::ancestry($this->class);
foreach($classes as $class) {
if(isset(self::$cache_get_one[$class])) unset(self::$cache_get_one[$class]);
}
$this->componentCache = array();
}
/**
* Does the hard work for get_one()
*
* @param string $filter A filter to be inserted into the WHERE clause
* @param string $orderby A sort expression to be inserted into the ORDER BY clause.
*
* @return DataObject The first item matching the query
*/
public function instance_get_one($filter, $orderby = null) {
$query = $this->buildSQL($filter);
$query->limit = "1";
if($orderby) {
$query->orderby = $orderby;
}
$this->extend('augmentSQL', $query);
$records = $query->execute();
$records->rewind();
$record = $records->current();
if($record) {
// Mid-upgrade, the database can have invalid RecordClassName values that need to be guarded against.
if(class_exists($record['RecordClassName'])) {
$record = new $record['RecordClassName']($record);
} else {
$record = new $this->class($record);
}
// Rather than restrict classes at the SQL-query level, we now check once the object has been instantiated
// This lets us check up on weird errors where the class has been incorrectly set, and give warnings to our
// developers
return $record;
}
}
/**
* Return the SiteTree object with the given URL segment.
*
* @param string $urlSegment The URL segment, eg 'home'
*
* @return SiteTree The object with the given URL segment
*/
public static function get_by_url($urlSegment) {
return DataObject::get_one("SiteTree", "URLSegment = '" . addslashes((string) $urlSegment) . "'");
}
/**
* Return the given element, searching by ID
*
* @param string $callerClass The class of the object to be returned
* @param int $id The id of the element
*
* @return DataObject The element
*/
public static function get_by_id($callerClass, $id) {
if(is_numeric($id)) {
if(singleton($callerClass) instanceof DataObject) {
$tableClasses = ClassInfo::dataClassesFor($callerClass);
$baseClass = array_shift($tableClasses);
return DataObject::get_one($callerClass,"`$baseClass`.`ID` = $id");
// This simpler code will be used by non-DataObject classes that implement DataObjectInterface
} else {
return DataObject::get_one($callerClass,"`ID` = $id");
}
} else {
user_error("DataObject::get_by_id passed a non-numeric ID #$id", E_USER_WARNING);
}
}
/**
* Get the name of the base table for this object
*/
public function baseTable() {
$tableClasses = ClassInfo::dataClassesFor($this->class);
return array_shift($tableClasses);
}
//-------------------------------------------------------------------------------------------//
/**
* 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.
*/
public function requireTable() {
// Only build the table if we've actually got fields
$fields = $this->databaseFields();
$indexes = $this->databaseIndexes();
if($fields) {
DB::requireTable($this->class, $fields, $indexes);
} else {
DB::dontRequireTable($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($extras[$relationship]) {
$manymanyFields = array_merge($manymanyFields, $extras[$relationship]);
}
// Build index list
$manymanyIndexes = array(
"{$this->class}ID" => true,
(($this->class == $childClass) ? "ChildID" : "{$childClass}ID") => true,
);
DB::requireTable("{$this->class}_$relationship", $manymanyFields, $manymanyIndexes);
}
}
// Let any extentions make their own database fields
$this->extend('augmentDatabase', $dummy);
}
/**
* 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().
*/
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 = new $className($record);
$obj->write();
}
Database::alteration_message("Added default records to $className table","created");
}
}
// Let any extentions make their own database default data
$this->extend('augmentDefaultRecords', $dummy);
}
/**
* Return the complete set of database fields, including Created, LastEdited and ClassName.
*
* @return array A map of field name to class of all databases fields on this object
*
*/
public function databaseFields() {
// For base tables, add a classname field
if($this->parentClass() == 'DataObject') {
$childClasses = ClassInfo::subclassesFor($this->class);
return array_merge(
array(
"ClassName" => "Enum('" . implode(", ", $childClasses) . "')",
"Created" => "Datetime",
"LastEdited" => "Datetime",
),
(array)$this->customDatabaseFields()
);
// Child table
} else {
return $this->customDatabaseFields();
}
}
/**
* Get the custom database fields for this object, from self::$db and self::$has_one,
* but not built-in fields like ID, ClassName, Created, LastEdited.
*
* @return array
*/
public function customDatabaseFields() {
$db = $this->uninherited('db',true);
$has_one = $this->uninherited('has_one',true);
$def = $db;
if($has_one) {
foreach($has_one as $field => $joinTo) {
$def[$field . 'ID'] = "Int";
}
}
return $def;
}
/**
* Returns fields bu traversing the class heirachy in a bottom-up direction.
*
* Needed to avoid getCMSFields being empty when customDatabaseFields overlooks
* the inheritance chain of the $db array, where a child data object has no $db array,
* but still needs to know the properties of its parent. This should be merged into databaseFields or
* customDatabaseFields.
*
* @todo review whether this is still needed after recent API changes
*/
public function inheritedDatabaseFields() {
$fields = array();
$currentObj = $this;
while(get_class($currentObj) != 'DataObject') {
$fields = array_merge($fields, (array)$currentObj->customDatabaseFields());
$currentObj = singleton($currentObj->parentClass());
}
return $fields;
}
/**
* 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 = $this->fieldLabels();
// fallback to summary fields
if(!$fields) $fields = array_keys($this->summaryFields());
// we need to make sure the format is unified before
// augumenting fields, so decorators can apply consistent checks
// but also after augumenting fields, because the decorator
// 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', // optiona.
// ))
$rewrite[$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 DataObjectDecorators 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::searchable_fields_labels} exists.
*
* @param $fieldName name of the field to retrieve
* @return array of all element labels if no argument given
* @return string of label if field
*/
public function fieldLabels($fieldName = false) {
$customLabels = $this->stat('field_labels');
$autoLabels = array();
if($this->inheritedDatabaseFields()){
foreach($this->inheritedDatabaseFields() as $name => $type) {
$autoLabels[$name] = FormField::name_to_label($name);
}
$labels = array_merge((array)$autoLabels, (array)$customLabels);
if($fieldName) {
return (isset($labels[$fieldName])) ? $labels[$fieldName] : FormField::name_to_label($fieldName);
} else {
return $labels;
}}
}
/**
* 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->hasField('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';
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 $filterClass is not set a name of any subclass of SearchFilter than assing 'PartiailMatchFilter' to it
if (!is_subclass_of($filterClass, 'SearchFilter')) {
$filterClass = 'PartialMatchFilter';
}
$filters[$name] = new $filterClass($name);
}
return $filters;
}
/**
* @return boolean True if the object is in the database
*/
public function isInDB() {
return is_numeric( $this->ID ) && $this->ID > 0;
}
/**
* Sets a 'context object' that can be used to provide hints about how to process a particular get / get_one request.
* In particular, DataObjectDecorators can use this to amend queries more effectively.
* Care must be taken to unset the context object after you're done with it, otherwise you will have a stale context,
* which could cause horrible bugs.
*/
public static function set_context_obj($obj) {
if($obj && self::$context_obj) user_error("Dataobject::set_context_obj called when there is already a context.", E_USER_WARNING);
self::$context_obj = $obj;
}
/**
* Retrieve the current context object.
*/
public static function context_obj() {
return self::$context_obj;
}
/**
* @ignore
*/
protected static $context_obj = null;
/*
* @ignore
*/
private static $subclass_access = true;
/**
* Temporarily disable subclass access in data object qeur
*/
static function disable_subclass_access() {
self::$subclass_access = false;
}
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
*/
public 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
*/
public static $casting = array(
"LastEdited" => "Datetime",
"Created" => "Datetime",
"Title" => 'Text',
);
/**
* If a field is in this array, then create a database index
* on that field. This is a map from fieldname to index type.
* @var array
*/
public 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 classname 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
*/
public 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
*/
public static $default_records = null;
/**
* one-to-one relationship definitions.
* This is a map from component name to data type.
* @var array
*/
public static $has_one = null;
/**
* one-to-many relationship definitions.
* This is a map from component name to data type.
*
* Caution: Because this doesn't define any data structure itself, you should
* specify a $has_one relationship on the other end of the relationship.
* Also, if the $has_one relationship on the other end has multiple
* definitions of this class (e.g. two different relationships to the Member
* object), then you need to write a custom accessor (e.g. overload the
* function from the key of this array), because sapphire won't know which
* to access.
*
* @var array
*/
public static $has_many = null;
/**
* many-many relationship definitions.
* This is a map from component name to data type.
* @var array
*/
public static $many_many = null;
/**
* Extra fields to include on the connecting many-many table.
* This is a map from field name to field type.
* @var array
*/
public 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
*/
public 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
*/
public 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'
* )
* );
*
*/
public static $searchable_fields = null;
/**
* User defined labels for searchable_fields, used to override
* default display in the search form.
*/
public static $field_labels = null;
/**
* Provides a default list of fields to be used by a 'summary'
* view of this object.
*/
public static $summary_fields = null;
}
?>