<?php
/**
* @package sapphire
* @subpackage model
*/
/**
* A single database record & abstract class for the data-access-model.
* @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;
protected $defs;
protected $fieldObjects;
/**
* The one-to-one, one-to-many and many-to-one components
* indexed by component name.
* @var array
*/
protected $components;
/**
* 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;
/**
* 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;
}
/**
* 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);
}
/**
* 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;
}
/**
* Pass a number of field changes in a map.
* Doesn't write to the database. To write the data,
* use the write() method.
*
* @param array $data A map of field name to data values to update.
*/
public function update($data) {
foreach($data as $k => $v) {
$this->$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;
}
/**
* 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!
*/
protected function onBeforeWrite() {
$this->brokenOnWrite = false;
$dummy = null;
$this->extend('augmentBeforeWrite', $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 = $fieldValue;
}
// Set many-many defaults with an array of ids
if(is_array($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 $forceWrite Write to database even if there are no changes
*
* @return int The ID of the record
*/
public function write($showDebug = false, $forceInsert = false, $forceWrite = false) {
$firstWrite = false;
$this->brokenOnWrite = true;
$isNewRecord = 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';
} 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(!$this->record['ID'] && isset($ancestry[0])) {
$baseTable = $ancestry[0];
DB::query("INSERT INTO `{$baseTable}` SET Created = NOW()");
$this->record['ID'] = DB::getGeneratedID($baseTable);
$this->changed['ID'] = 2;
$isNewRecord = true;
}
// Divvy up field saving into a number of database manipulations
if(isset($ancestry) && is_array($ancestry)) {
foreach($ancestry as $idx => $class) {
$classSingleton = singleton($class);
foreach($this->record as $fieldName => $value) {
if(isset($this->changed[$fieldName]) && $this->changed[$fieldName] && $fieldType = $classSingleton->fieldExists($fieldName)) {
$manipulation[$class]['fields'][$fieldName] = $value ? ("'" . addslashes($value) . "'") : singleton($fieldType)->nullValue();
}
}
// Add the class name to the base object
if($idx == 0) {
$manipulation[$class]['fields']["LastEdited"] = "now()";
if($dbCommand == 'insert') {
$manipulation[$class]['fields']["Created"] = "now()";
//echo "<li>$this->class - " .get_class($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->changed = null;
} elseif ( $showDebug ) {
echo "<b>Debug:</b> no changes for DataObject<br />";
}
// 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');
}
$this->record['LastEdited'] = date('Y-m-d H:i:s');
}
// Write ComponentSets as necessary
if($this->components) {
foreach($this->components as $component) {
$component->write($firstWrite);
}
}
return $this->record['ID'];
}
/**
* 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 $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 $limit A limit expression to be inserted into the LIMIT clause
*
* @return ComponentSet The components of the one-to-many relationship.
*/
public function getComponents($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
$componentObj = singleton($componentClass);
$id = $this->getField("ID");
// get filter
$combinedFilter = "$joinField = '$id'";
if($filter) $combinedFilter .= " AND {$filter}";
$result = $componentObj->instance_get($combinedFilter, $sort, $join, $limit, "ComponentSet");
}
if(!$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;
}
/**
* 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::getComsponents(): 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);
if($this->ID && is_numeric($this->ID)) {
if($componentClass) {
$componentObj = singleton($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, "`$table`.*");
if($filter) $query->where[] = $filter;
if($join) $query->from[] = $join;
$records = $query->execute();
$result = $this->buildDataObjectSet($records, "ComponentSet", $query, $componentBaseClass);
if(!$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;
}
/**
* 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);
}
}
/**
* 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() {
$classes = ClassInfo::ancestry($this);
$good = false;
$items = array();
foreach($classes as $class) {
// Wait until after we reach DataObject
if(!$good) {
if($class == 'DataObject') {
$good = true;
}
continue;
}
eval("\$items = array_merge((array){$class}::\$db, (array)\$items);");
}
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) {
// Try many_many
$candidate = eval("return isset({$class}::\$many_many[\$component]) ? {$class}::\$many_many[\$component] : null;");
if($candidate) {
$parentField = $class . "ID";
$childField = ($class == $candidate) ? "ChildID" : $candidate . "ID";
return array($class, $candidate, $parentField, $childField, "{$class}_$component");
}
// Try belongs_many_many
$candidate = eval("return isset({$class}::\$belongs_many_many[\$component]) ? {$class}::\$belongs_many_many[\$component] : null;");
if($candidate) {
$childField = $candidate . "ID";
// We need to find the inverse component name
$otherManyMany = eval("return {$candidate}::\$many_many;");
if(!$otherManyMany) {
Debug::message("Inverse component of $candidate not found");
}
foreach($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;
}
/**
* 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) {
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.
*
* @param boolean $databaseFieldsOnly Get only database fields that have changed
* @param int $changeLevel The strictness of what is defined as change
*/
public function getChangedFields($databaseFieldsOnly = false, $changeLevel = 1) {
if($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]);
}
}
}
return $fields;
}
/**
* 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) {
$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(
// Only existing fields
$this->fieldExists($fieldName)
// Catches "0"==NULL
&& (isset($this->record[$fieldName]) && (intval($val) != intval($this->record[$fieldName])))
// Main non type-based check
&& (isset($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);
$fieldObj->setVal($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);
}
/**
* 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 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);
}
}
/**
* Debugging used by Debug::show()
*
* @return string HTML data representing this object
*/
public function debug() {
$val = "<h3>Database record: $this->class</h3><ul>";
if($this->record) foreach($this->record as $fieldName => $fieldVal) {
$val .= "<li style=\"list-style-type: disc; margin-left: 20px\">$fieldName : " . Debug::text($fieldVal) . "</li>";
}
$val .= "</ul>";
return $val;
}
/**
* Returns the field type of the given field, if it belongs to this class, and not a parent.
* Can be used to detect whether the given field exists.
* Note that the field type will not include constructor arguments; only the classname.
*
* @param string $field Name of the field
*
* @return string The field type of the given field
*/
public function fieldExists($field) {
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($this) == "DataObject") return "Datetime";
if($field == "Version") return $this->hasExtension('Versioned') ? "Int" : false;
$fieldMap = $this->uninherited('fieldExists');
if(!$fieldMap) {
$fieldMap = $this->uninherited('db', true);
$has = $this->uninherited('has_one', true);
if($has) foreach($has as $fieldName => $fieldSchema) {
$fieldMap[$fieldName . 'ID'] = "Int";
}
$this->set_uninherited('fieldExists', $fieldMap);
}
return isset($fieldMap[$field]) ? strtok($fieldMap[$field],'(') : null;
}
/**
* Return the DBField object that represents the given field.
* This works similarly to obj() but still returns an object even when the field has no value.
*
* @param string $fieldName Name of the field
*
* @return DBField The field as a DBField object
*/
public function dbObject($fieldName) {
$helperPair = $this->castingHelperPair($fieldName);
$constructor = $helperPair['castingHelper'];
if($obj = eval($constructor)) {
$obj->setVal($this->$fieldName);
}
return $obj;
}
/**
* Build a {@link SQLQuery} object to perform the given query.
*
* @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 $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`.*");
// If sort contains a function call, let's move the sort clause into a separate selected field.
// Some versions of MySQL choke if you have a group function referenced directly in the ORDER BY
if($sort && strpos($sort,'(') !== false) {
// Sort can be "Col1 DESC|ASC, Col2 DESC|ASC", we need to handle that
$sortParts = explode(",", $sort);
// If you have select if(X,A,B),C then the array will return 'if(X','A','B)','C'.
// Turn this into 'if(X,A,B)','C' by counting brackets
while(list($i,$sortPart) = each($sortParts)) {
while(substr_count($sortPart,'(') > substr_count($sortPart,')')) {
list($i,$nextSortPart) = each($sortParts);
if($i === null) break;
$sortPart .= ',' . $nextSortPart;
}
$lumpedSortParts[] = $sortPart;
}
foreach($lumpedSortParts as $i => $sortPart) {
$sortPart = trim($sortPart);
if(substr(strtolower($sortPart),-5) == ' desc') {
$select[] = substr($sortPart,0,-5) . " AS _SortColumn{$i}";
$newSorts[] = "_SortColumn{$i} DESC";
} else if(substr(strtolower($sortPart),-4) == ' asc') {
$select[] = substr($sortPart,0,-4) . " AS _SortColumn{$i}";
$newSorts[] = "_SortColumn{$i} ASC";
} else {
$select[] = "$sortPart AS _SortColumn{$i}";
$newSorts[] = "_SortColumn{$i} ASC";
}
}
$sort = implode(", ", $newSorts);
}
// Build our intial query
$query = new SQLQuery($select, "`$baseClass`", $filter, $sort);
// Join all the tables
if($tableClasses) {
foreach($tableClasses as $tableClass) {
$query->from[$tableClass] = "LEFT JOIN `$tableClass` ON `$tableClass`.ID = `$baseClass`.ID";
$query->select[] = "`$tableClass`.*";
}
}
$query->select[] = "`$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("','", $classNames) . "')";
}
if($limit) {
$query->limit = $limit;
}
if($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 $sort A sort expression to be inserted into the ORDER BY clause. If omitted, self::$default_sort will be used.
* @param string $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
*
* @return string The fields as an HTML unordered list
*/
function listOfFields() {
$fields = func_get_args();
$result = "<ul>\n";
foreach($fields as $field)
$result .= "<li><b>$field:</b> " . $this->$field . "</li>\n";
$result .= "</ul>";
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 $sort A sort expression to be inserted into the ORDER BY clause. If omitted, self::$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 $containerClass
*/
public static function get($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}_{$orderby}");
if(!$cache || !isset(DataObject::$cache_get_one[$callerClass][$sum]) || !DataObject::$cache_get_one[$callerClass][$sum] || DataObject::$cache_get_one[$callerClass][$sum]->destroyed) {
$item = singleton($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] : $item;
}
/**
* Flush the cached results for get_one()
*/
public function flushCache() {
if($this->class == 'DataObject') {
DataObject::$cache_get_one = array();
return;
}
$classes = ClassInfo::ancestry($this->class);
foreach($classes as $class) {
// If someone else has called get_one and flushCache() is called, then that object will be destroyed.
// Not very friendly. We need a better way of dealing with PHP's garbage collection limitations.
// Until then, this line is being commented out.
// if(DataObject::$cache_get_one[$class]) foreach(DataObject::$cache_get_one[$class] as $obj) if($obj) $obj->destroy();
DataObject::$cache_get_one[$class] = null;
}
}
/**
* 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);
}
}
//-------------------------------------------------------------------------------------------//
/**
* 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)) {
// Populate with default data if table is empty
$baseClass = ClassInfo::baseDataClass($this->class);
if($baseClass) {
$hasData = (DB::query("SELECT ID FROM `{$baseClass}`")->value());
if(!$hasData) {
foreach($defaultRecords as $record) {
$obj = new $baseClass($record);
$obj->write();
}
Database::alteration_message("Added default records to $baseClass 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
*/
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;
}
/**
* @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;
}
protected static $context_obj = null;
//-------------------------------------------------------------------------------------------//
/**
* 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",
);
/**
* 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.
* @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;
}
?>