Extensions * * See {@link Extension} and {@link DataExtension}. * *

Permission Control

* * Object-level access control by {@link Permission}. Permission codes are arbitrary * strings which can be selected on a group-by-group basis. * * * class Article extends DataObject implements PermissionProvider { * static $api_access = true; * * function canView($member = false) { * return Permission::check('ARTICLE_VIEW'); * } * function canEdit($member = false) { * return Permission::check('ARTICLE_EDIT'); * } * function canDelete() { * return Permission::check('ARTICLE_DELETE'); * } * function canCreate() { * return Permission::check('ARTICLE_CREATE'); * } * function providePermissions() { * return array( * 'ARTICLE_VIEW' => 'Read an article object', * 'ARTICLE_EDIT' => 'Edit an article object', * 'ARTICLE_DELETE' => 'Delete an article object', * 'ARTICLE_CREATE' => 'Create an article object', * ); * } * } * * * Object-level access control by {@link Group} membership: * * class Article extends DataObject { * static $api_access = true; * * function canView($member = false) { * if(!$member) $member = Member::currentUser(); * return $member->inGroup('Subscribers'); * } * function canEdit($member = false) { * if(!$member) $member = Member::currentUser(); * return $member->inGroup('Editors'); * } * * // ... * } * * * If any public method on this class is prefixed with an underscore, * the results are cached in memory through {@link cachedCall()}. * * * @todo Add instance specific removeExtension() which undos loadExtraStatics() * and defineMethods() * * @package framework * @subpackage model */ class DataObject extends ViewableData implements DataObjectInterface, i18nEntityProvider { /** * Human-readable singular name. * @var string * @config */ private static $singular_name = null; /** * Human-readable pluaral name * @var string * @config */ private static $plural_name = null; /** * Allow API access to this object? * @todo Define the options that can be set here * @config */ private static $api_access = false; /** * True if this DataObject has been destroyed. * @var boolean */ public $destroyed = false; /** * The DataModel from this this object comes */ protected $model; /** * Data stored in this objects database record. An array indexed by fieldname. * * Use {@link toMap()} if you want an array representation * of this object, as the $record array might contain lazy loaded field aliases. * * @var array */ protected $record; /** * Represents a field that hasn't changed (before === after, thus before == after) */ const CHANGE_NONE = 0; /** * Represents a field that has changed type, although not the loosely defined value. * (before !== after && before == after) * E.g. change 1 to true or "true" to true, but not true to 0. * Value changes are by nature also considered strict changes. */ const CHANGE_STRICT = 1; /** * Represents a field that has changed the loosely defined value * (before != after, thus, before !== after)) * E.g. change false to true, but not false to 0 */ const CHANGE_VALUE = 2; /** * An array indexed by fieldname, true if the field has been changed. * Use {@link getChangedFields()} and {@link isChanged()} to inspect * the changed state. * * @var array */ private $changed; /** * The database record (in the same format as $record), before * any changes. * @var array */ protected $original; /** * Used by onBeforeDelete() to ensure child classes call parent::onBeforeDelete() * @var boolean */ protected $brokenOnDelete = false; /** * Used by onBeforeWrite() to ensure child classes call parent::onBeforeWrite() * @var boolean */ protected $brokenOnWrite = false; /** * @config * @var boolean Should dataobjects be validated before they are written? * Caution: Validation can contain safeguards against invalid/malicious data, * and check permission levels (e.g. on {@link Group}). Therefore it is recommended * to only disable validation for very specific use cases. */ private static $validation_enabled = true; /** * Static caches used by relevant functions. */ public static $cache_has_own_table = array(); public static $cache_has_own_table_field = array(); protected static $_cache_db = array(); protected static $_cache_get_one; protected static $_cache_get_class_ancestry; protected static $_cache_composite_fields = array(); protected static $_cache_custom_database_fields = array(); protected static $_cache_field_labels = array(); // base fields which are not defined in static $db private static $fixed_fields = array( 'ID' => 'Int', 'ClassName' => 'Enum', 'LastEdited' => 'SS_Datetime', 'Created' => 'SS_Datetime', ); /** * Non-static relationship cache, indexed by component name. */ protected $components; /** * Non-static cache of has_many and many_many relations that can't be written until this object is saved. */ protected $unsavedRelations; /** * Returns when validation on DataObjects is enabled. * * @deprecated 3.2 Use the "DataObject.validation_enabled" config setting instead * @return bool */ public static function get_validation_enabled() { Deprecation::notice('3.2', 'Use the "DataObject.validation_enabled" config setting instead'); return Config::inst()->get('DataObject', 'validation_enabled'); } /** * Set whether DataObjects should be validated before they are written. * * Caution: Validation can contain safeguards against invalid/malicious data, * and check permission levels (e.g. on {@link Group}). Therefore it is recommended * to only disable validation for very specific use cases. * * @param $enable bool * @see DataObject::validate() * @deprecated 3.2 Use the "DataObject.validation_enabled" config setting instead */ public static function set_validation_enabled($enable) { Deprecation::notice('3.2', 'Use the "DataObject.validation_enabled" config setting instead'); Config::inst()->update('DataObject', 'validation_enabled', (bool)$enable); } /** * @var [string] - class => ClassName field definition cache for self::database_fields */ private static $classname_spec_cache = array(); /** * Clear all cached classname specs. It's necessary to clear all cached subclassed names * for any classes if a new class manifest is generated. */ public static function clear_classname_spec_cache() { self::$classname_spec_cache = array(); } /** * Return the complete map of fields on this object, including "Created", "LastEdited" and "ClassName". * See {@link custom_database_fields()} for a getter that excludes these "base fields". * * @param string $class * @return array */ public static function database_fields($class) { if(get_parent_class($class) == 'DataObject') { if(empty(self::$classname_spec_cache[$class])) { $classNames = ClassInfo::subclassesFor($class); $db = DB::getConn(); if($db->hasField($class, 'ClassName')) { $existing = $db->query("SELECT DISTINCT \"ClassName\" FROM \"$class\"")->column(); $classNames = array_unique(array_merge($existing, $classNames)); } self::$classname_spec_cache[$class] = "Enum('" . implode(', ', $classNames) . "')"; } return array_merge ( // TODO: should this be using self::$fixed_fields? only difference is ID field // and ClassName creates an Enum with all values array ( 'ClassName' => self::$classname_spec_cache[$class], 'Created' => 'SS_Datetime', 'LastEdited' => 'SS_Datetime' ), self::custom_database_fields($class) ); } return self::custom_database_fields($class); } /** * Get all database columns explicitly defined on a class in {@link DataObject::$db} * and {@link DataObject::$has_one}. Resolves instances of {@link CompositeDBField} * into the actual database fields, rather than the name of the field which * might not equate a database column. * * Does not include "base fields" like "ID", "ClassName", "Created", "LastEdited", * see {@link database_fields()}. * * @uses CompositeDBField->compositeDatabaseFields() * * @param string $class * @return array Map of fieldname to specification, similiar to {@link DataObject::$db}. */ public static function custom_database_fields($class) { if(isset(self::$_cache_custom_database_fields[$class])) { return self::$_cache_custom_database_fields[$class]; } $fields = Config::inst()->get($class, 'db', Config::UNINHERITED); foreach(self::composite_fields($class, false) as $fieldName => $fieldClass) { // Remove the original fieldname, it's not an actual database column unset($fields[$fieldName]); // Add all composite columns $compositeFields = singleton($fieldClass)->compositeDatabaseFields(); if($compositeFields) foreach($compositeFields as $compositeName => $spec) { $fields["{$fieldName}{$compositeName}"] = $spec; } } // Add has_one relationships $hasOne = Config::inst()->get($class, 'has_one', Config::UNINHERITED); if($hasOne) foreach(array_keys($hasOne) as $field) { $fields[$field . 'ID'] = 'ForeignKey'; } $output = (array) $fields; self::$_cache_custom_database_fields[$class] = $output; return $output; } /** * Returns the field class if the given db field on the class is a composite field. * Will check all applicable ancestor classes and aggregate results. */ public static function is_composite_field($class, $name, $aggregated = true) { if(!isset(DataObject::$_cache_composite_fields[$class])) self::cache_composite_fields($class); if(isset(DataObject::$_cache_composite_fields[$class][$name])) { return DataObject::$_cache_composite_fields[$class][$name]; } else if($aggregated && $class != 'DataObject' && ($parentClass=get_parent_class($class)) != 'DataObject') { return self::is_composite_field($parentClass, $name); } } /** * Returns a list of all the composite if the given db field on the class is a composite field. * Will check all applicable ancestor classes and aggregate results. */ public static function composite_fields($class, $aggregated = true) { if(!isset(DataObject::$_cache_composite_fields[$class])) self::cache_composite_fields($class); $compositeFields = DataObject::$_cache_composite_fields[$class]; if($aggregated && $class != 'DataObject' && ($parentClass=get_parent_class($class)) != 'DataObject') { $compositeFields = array_merge($compositeFields, self::composite_fields($parentClass)); } return $compositeFields; } /** * Internal cacher for the composite field information */ private static function cache_composite_fields($class) { $compositeFields = array(); $fields = Config::inst()->get($class, 'db', Config::UNINHERITED); if($fields) foreach($fields as $fieldName => $fieldClass) { if(!is_string($fieldClass)) continue; // Strip off any parameters $bPos = strpos('(', $fieldClass); if($bPos !== FALSE) $fieldClass = substr(0,$bPos, $fieldClass); // Test to see if it implements CompositeDBField if(ClassInfo::classImplements($fieldClass, 'CompositeDBField')) { $compositeFields[$fieldName] = $fieldClass; } } DataObject::$_cache_composite_fields[$class] = $compositeFields; } /** * 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 $isSingleton This this to true if this is a singleton() object, a stub for calling methods. * Singletons don't have their defaults set. */ public function __construct($record = null, $isSingleton = false, $model = null) { parent::__construct(); // Set the fields data. if(!$record) { $record = array( 'ID' => 0, 'ClassName' => get_class($this), 'RecordClassName' => get_class($this) ); } if(!is_array($record) && !is_a($record, "stdClass")) { if(is_object($record)) $passed = "an object of type '$record->class'"; else $passed = "The value '$record'"; user_error("DataObject::__construct passed $passed. It's supposed to be passed an array," . " taken straight from the database. Perhaps you should use DataList::create()->First(); instead?", E_USER_WARNING); $record = null; } // Set $this->record to $record, but ignore NULLs $this->record = array(); foreach($record as $k => $v) { // Ensure that ID is stored as a number and not a string // To do: this kind of clean-up should be done on all numeric fields, in some relatively // performant manner if($v !== null) { if($k == 'ID' && is_numeric($v)) $this->record[$k] = (int)$v; else $this->record[$k] = $v; } } // Identify fields that should be lazy loaded, but only on existing records if(!empty($record['ID'])) { $currentObj = get_class($this); while($currentObj != 'DataObject') { $fields = self::custom_database_fields($currentObj); foreach($fields as $field => $type) { if(!array_key_exists($field, $record)) $this->record[$field.'_Lazy'] = $currentObj; } $currentObj = get_parent_class($currentObj); } } $this->original = $this->record; // Keep track of the modification date of all the data sourced to make this page // From this we create a Last-Modified HTTP header if(isset($record['LastEdited'])) { HTTP::register_modification_date($record['LastEdited']); } // this must be called before populateDefaults(), as field getters on a DataObject // may call getComponent() and others, which rely on $this->model being set. $this->model = $model ? $model : DataModel::inst(); // Must be called after parent constructor if(!$isSingleton && (!isset($this->record['ID']) || !$this->record['ID'])) { $this->populateDefaults(); } // prevent populateDefaults() and setField() from marking overwritten defaults as changed $this->changed = array(); } /** * Set the DataModel * @param DataModel $model * @return DataObject $this */ public function setDataModel(DataModel $model) { $this->model = $model; return $this; } /** * Destroy all of this objects dependant objects and local caches. * You'll need to call this to get the memory of an object that has components or extensions freed. */ public function destroy() { //$this->destroyed = true; gc_collect_cycles(); $this->flushCache(false); } /** * Create a duplicate of this node. * Note: now also duplicates relations. * * @param $doWrite Perform a write() operation before returning the object. If this is true, it will create the * duplicate in the database. * @return DataObject A duplicate of this node. The exact type will be the type of this node. */ public function duplicate($doWrite = true) { $className = $this->class; $clone = new $className( $this->toMap(), false, $this->model ); $clone->ID = 0; $clone->invokeWithExtensions('onBeforeDuplicate', $this, $doWrite); if($doWrite) { $clone->write(); $this->duplicateManyManyRelations($this, $clone); } $clone->invokeWithExtensions('onAfterDuplicate', $this, $doWrite); return $clone; } /** * Copies the many_many and belongs_many_many relations from one object to another instance of the name of object * The destinationObject must be written to the database already and have an ID. Writing is performed * automatically when adding the new relations. * * @param $sourceObject the source object to duplicate from * @param $destinationObject the destination object to populate with the duplicated relations * @return DataObject with the new many_many relations copied in */ protected function duplicateManyManyRelations($sourceObject, $destinationObject) { if (!$destinationObject || $destinationObject->ID < 1) { user_error("Can't duplicate relations for an object that has not been written to the database", E_USER_ERROR); } //duplicate complex relations // DO NOT copy has_many relations, because copying the relation would result in us changing the has_one // relation on the other side of this relation to point at the copy and no longer the original (being a // has_one, it can only point at one thing at a time). So, all relations except has_many can and are copied if ($sourceObject->has_one()) foreach($sourceObject->has_one() as $name => $type) { $this->duplicateRelations($sourceObject, $destinationObject, $name); } if ($sourceObject->many_many()) foreach($sourceObject->many_many() as $name => $type) { //many_many include belongs_many_many $this->duplicateRelations($sourceObject, $destinationObject, $name); } return $destinationObject; } /** * Helper function to duplicate relations from one object to another * @param $sourceObject the source object to duplicate from * @param $destinationObject the destination object to populate with the duplicated relations * @param $name the name of the relation to duplicate (e.g. members) */ private function duplicateRelations($sourceObject, $destinationObject, $name) { $relations = $sourceObject->$name(); if ($relations) { if ($relations instanceOf RelationList) { //many-to-something relation if ($relations->Count() > 0) { //with more than one thing it is related to foreach($relations as $relation) { $destinationObject->$name()->add($relation); } } } else { //one-to-one relation $destinationObject->{"{$name}ID"} = $relations->ID; } } } public function getObsoleteClassName() { $className = $this->getField("ClassName"); if (!ClassInfo::exists($className)) return $className; } public function getClassName() { $className = $this->getField("ClassName"); if (!ClassInfo::exists($className)) return get_class($this); return $className; } /** * Set the ClassName attribute. {@link $class} is also updated. * Warning: This will produce an inconsistent record, as the object * instance will not automatically switch to the new subclass. * Please use {@link newClassInstance()} for this purpose, * or destroy and reinstanciate the record. * * @param string $className The new ClassName attribute (a subclass of {@link DataObject}) * @return DataObject $this */ public function setClassName($className) { $className = trim($className); if(!$className || !is_subclass_of($className, 'DataObject')) return; $this->class = $className; $this->setField("ClassName", $className); return $this; } /** * Create a new instance of a different class from this object's record. * This is useful when dynamically changing the type of an instance. Specifically, * it ensures that the instance of the class is a match for the className of the * record. Don't set the {@link DataObject->class} or {@link DataObject->ClassName} * property manually before calling this method, as it will confuse change detection. * * If the new class is different to the original class, defaults are populated again * because this will only occur automatically on instantiation of a DataObject if * there is no record, or the record has no ID. In this case, we do have an ID but * we still need to repopulate the defaults. * * @param string $newClassName The name of the new class * * @return DataObject The new instance of the new class, The exact type will be of the class name provided. */ public function newClassInstance($newClassName) { $originalClass = $this->ClassName; $newInstance = new $newClassName(array_merge( $this->record, array( 'ClassName' => $originalClass, 'RecordClassName' => $originalClass, ) ), false, $this->model); if($newClassName != $originalClass) { $newInstance->setClassName($newClassName); $newInstance->populateDefaults(); $newInstance->forceChange(); } return $newInstance; } /** * Adds methods from the extensions. * Called by Object::__construct() once per class. */ public function defineMethods() { parent::defineMethods(); // Define the extra db fields - this is only necessary for extensions added in the // class definition. Object::add_extension() will call this at definition time for // those objects, which is a better mechanism. Perhaps extensions defined inside the // class def can somehow be applied at definiton time also? if($this->extension_instances) foreach($this->extension_instances as $i => $instance) { if(!$instance->class) { $class = get_class($instance); user_error("DataObject::defineMethods(): Please ensure {$class}::__construct() calls" . " parent::__construct()", E_USER_ERROR); } } if($this->class == 'DataObject') return; // Set up accessors for joined items if($manyMany = $this->many_many()) { foreach($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'); } } if($belongsTo = $this->belongs_to()) foreach(array_keys($belongsTo) as $relationship) { $this->addWrapperMethod($relationship, 'getComponent'); } } /** * Returns true if this object "exists", i.e., has a sensible value. * The default behaviour for a DataObject is to return true if * the object exists in the database, you can override this in subclasses. * * @return boolean true if this object exists */ public function exists() { return (isset($this->record['ID']) && $this->record['ID'] > 0); } /** * Returns TRUE if all values (other than "ID") are * considered empty (by weak boolean comparison). * Only checks for fields listed in {@link custom_database_fields()} * * @todo Use DBField->hasValue() * * @return boolean */ public function isEmpty(){ $isEmpty = true; $customFields = self::custom_database_fields(get_class($this)); if($map = $this->toMap()){ foreach($map as $k=>$v){ // only look at custom fields if(!array_key_exists($k, $customFields)) continue; $dbObj = ($v instanceof DBField) ? $v : $this->dbObject($k); $isEmpty = ($isEmpty && !$dbObj->exists()); } } return $isEmpty; } /** * Get the user friendly singular name of this DataObject. * If the name is not defined (by redefining $singular_name in the subclass), * this returns the class name. * * @return string User friendly singular name of this DataObject */ public function singular_name() { if(!$name = $this->stat('singular_name')) { $name = ucwords(trim(strtolower(preg_replace('/_?([A-Z])/', ' $1', $this->class)))); } return $name; } /** * Get the translated user friendly singular name of this DataObject * same as singular_name() but runs it through the translating function * * Translating string is in the form: * $this->class.SINGULARNAME * Example: * Page.SINGULARNAME * * @return string User friendly translated singular name of this DataObject */ public function i18n_singular_name() { return _t($this->class.'.SINGULARNAME', $this->singular_name()); } /** * Get the user friendly plural name of this DataObject * If the name is not defined (by renaming $plural_name in the subclass), * this returns a pluralised version of the class name. * * @return string User friendly plural name of this DataObject */ public function plural_name() { if($name = $this->stat('plural_name')) { return $name; } else { $name = $this->singular_name(); if(substr($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 */ public function i18n_plural_name() { $name = $this->plural_name(); return _t($this->class.'.PLURALNAME', $name); } /** * Standard implementation of a title/label for a specific * record. Tries to find properties 'Title' or 'Name', * and falls back to the 'ID'. Useful to provide * user-friendly identification of a record, e.g. in errormessages * or UI-selections. * * Overload this method to have a more specialized implementation, * e.g. for an Address record this could be: * * function getTitle() { * return "{$this->StreetNumber} {$this->StreetName} {$this->City}"; * } * * * @return string */ public function getTitle() { if($this->hasDatabaseField('Title')) return $this->getField('Title'); if($this->hasDatabaseField('Name')) return $this->getField('Name'); return "#{$this->ID}"; } /** * Returns the associated database record - in this case, the object itself. * This is included so that you can call $dataOrController->data() and get a DataObject all the time. * * @return DataObject Associated database record */ public function data() { return $this; } /** * Convert this object to a map. * * @return array The data as a map. */ public function toMap() { $this->loadLazyFields(); return $this->record; } /** * Return all currently fetched database fields. * * This function is similar to toMap() but doesn't trigger the lazy-loading of all unfetched fields. * Obviously, this makes it a lot faster. * * @return array The data as a map. */ public function getQueriedDatabaseFields() { return $this->record; } /** * Update a number of fields on this object, given a map of the desired changes. * * The field names can be simple names, or you can use a dot syntax to access $has_one relations. * For example, array("Author.FirstName" => "Jim") will set $this->Author()->FirstName to "Jim". * * update() doesn't write the main object, but if you use the dot syntax, it will write() * the related objects that it alters. * * @param array $data A map of field name to data values to update. * @return DataObject $this */ public function update($data) { foreach($data as $k => $v) { // Implement dot syntax for updates if(strpos($k,'.') !== false) { $relations = explode('.', $k); $fieldName = array_pop($relations); $relObj = $this; foreach($relations as $i=>$relation) { // no support for has_many or many_many relationships, // as the updater wouldn't know which object to write to (or create) if($relObj->$relation() instanceof DataObject) { $parentObj = $relObj; $relObj = $relObj->$relation(); // If the intermediate relationship objects have been created, then write them if($iID || (!$relObj->ID && $parentObj != $this)) { $relObj->write(); $relatedFieldName = $relation."ID"; $parentObj->$relatedFieldName = $relObj->ID; $parentObj->write(); } } else { user_error( "DataObject::update(): Can't traverse relationship '$relation'," . "it has to be a has_one relationship or return a single DataObject", E_USER_NOTICE ); // unset relation object so we don't write properties to the wrong object unset($relObj); break; } } if($relObj) { $relObj->$fieldName = $v; $relObj->write(); $relatedFieldName = $relation."ID"; $this->$relatedFieldName = $relObj->ID; $relObj->flushCache(); } else { user_error("Couldn't follow dot syntax '$k' on '$this->class' object", E_USER_WARNING); } } else { $this->$k = $v; } } return $this; } /** * Pass changes as a map, and try to * get automatic casting for these fields. * Doesn't write to the database. To write the data, * use the write() method. * * @param array $data A map of field name to data values to update. * @return DataObject $this */ public function castedUpdate($data) { foreach($data as $k => $v) { $this->setCastedField($k,$v); } return $this; } /** * Merges data and relations from another object of same class, * without conflict resolution. Allows to specify which * dataset takes priority in case its not empty. * has_one-relations are just transferred with priority 'right'. * has_many and many_many-relations are added regardless of priority. * * Caution: has_many/many_many relations are moved rather than duplicated, * meaning they are not connected to the merged object any longer. * Caution: Just saves updated has_many/many_many relations to the database, * doesn't write the updated object itself (just writes the object-properties). * Caution: Does not delete the merged object. * Caution: Does now overwrite Created date on the original object. * * @param $obj DataObject * @param $priority String left|right Determines who wins in case of a conflict (optional) * @param $includeRelations Boolean Merge any existing relations (optional) * @param $overwriteWithEmpty Boolean Overwrite existing left values with empty right values. * Only applicable with $priority='right'. (optional) * @return Boolean */ public function merge($rightObj, $priority = 'right', $includeRelations = true, $overwriteWithEmpty = false) { $leftObj = $this; if($leftObj->ClassName != $rightObj->ClassName) { // we can't merge similiar subclasses because they might have additional relations user_error("DataObject->merge(): Invalid object class '{$rightObj->ClassName}' (expected '{$leftObj->ClassName}').", E_USER_WARNING); return false; } if(!$rightObj->ID) { user_error("DataObject->merge(): Please write your merged-in object to the database before merging, to make sure all relations are transferred properly.').", E_USER_WARNING); return false; } // makes sure we don't merge data like ID or ClassName $leftData = $leftObj->inheritedDatabaseFields(); $rightData = $rightObj->inheritedDatabaseFields(); foreach($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. Only sets fields as changed * if they are not already marked as changed. * * @return DataObject $this */ public function forceChange() { // Ensure lazy fields loaded $this->loadLazyFields(); // $this->record might not contain the blank values so we loop on $this->inheritedDatabaseFields() as well $fieldNames = array_unique(array_merge( array_keys($this->record), array_keys($this->inheritedDatabaseFields()))); foreach($fieldNames as $fieldName) { if(!isset($this->changed[$fieldName])) $this->changed[$fieldName] = self::CHANGE_STRICT; // Populate the null values in record so that they actually get written if(!isset($this->record[$fieldName])) $this->record[$fieldName] = null; } // @todo Find better way to allow versioned to write a new version after forceChange if($this->isChanged('Version')) unset($this->changed['Version']); return $this; } /** * Validate the current object. * * By default, there is no validation - objects are always valid! However, you can overload this method in your * DataObject sub-classes to specify custom validation, or use the hook through DataExtension. * * Invalid objects won't be able to be written - a warning will be thrown and no write will occur. onBeforeWrite() * and onAfterWrite() won't get called either. * * It is expected that you call validate() in your own application to test that an object is valid before * attempting a write, and respond appropriately if it isn't. * * @return A {@link ValidationResult} object */ public function validate() { $result = ValidationResult::create(); $this->extend('validate', $result); return $result; } /** * Event handler called before writing to the database. * You can overload this to clean up or otherwise process data before writing it to the * database. Don't forget to call parent::onBeforeWrite(), though! * * This called after {@link $this->validate()}, so you can be sure that your data is valid. * * @uses DataExtension->onBeforeWrite() */ protected function onBeforeWrite() { $this->brokenOnWrite = false; $dummy = null; $this->extend('onBeforeWrite', $dummy); } /** * Event handler called after writing to the database. * You can overload this to act upon changes made to the data after it is written. * $this->changed will have a record * database. Don't forget to call parent::onAfterWrite(), though! * * @uses DataExtension->onAfterWrite() */ protected function onAfterWrite() { $dummy = null; $this->extend('onAfterWrite', $dummy); } /** * Event handler called before deleting from the database. * You can overload this to clean up or otherwise process data before delete this * record. Don't forget to call parent::onBeforeDelete(), though! * * @uses DataExtension->onBeforeDelete() */ protected function onBeforeDelete() { $this->brokenOnDelete = false; $dummy = null; $this->extend('onBeforeDelete', $dummy); } protected function onAfterDelete() { $this->extend('onAfterDelete'); } /** * Load the default values in from the self::$defaults array. * Will traverse the defaults of the current class and all its parent classes. * Called by the constructor when creating new records. * * @uses DataExtension->populateDefaults() * @return DataObject $this */ public function populateDefaults() { $classes = array_reverse(ClassInfo::ancestry($this)); foreach($classes as $class) { $defaults = Config::inst()->get($class, 'defaults', Config::UNINHERITED); if($defaults && !is_array($defaults)) { user_error("Bad '$this->class' defaults given: " . var_export($defaults, true), E_USER_WARNING); $defaults = null; } if($defaults) foreach($defaults as $fieldName => $fieldValue) { // SRM 2007-03-06: Stricter check if(!isset($this->$fieldName) || $this->$fieldName === null) { $this->$fieldName = $fieldValue; } // Set many-many defaults with an array of ids if(is_array($fieldValue) && $this->many_many($fieldName)) { $manyManyJoin = $this->$fieldName(); $manyManyJoin->setByIdList($fieldValue); } } if($class == 'DataObject') { break; } } $this->extend('populateDefaults'); return $this; } /** * Writes all changes to this object to the database. * - It will insert a record whenever ID isn't set, otherwise update. * - All relevant tables will be updated. * - $this->onBeforeWrite() gets called beforehand. * - Extensions such as Versioned will ammend the database-write to ensure that a version is saved. * * @uses DataExtension->augmentWrite() * * @param boolean $showDebug Show debugging information * @param boolean $forceInsert Run INSERT command rather than UPDATE, even if record already exists * @param boolean $forceWrite Write to database even if there are no changes * @param boolean $writeComponents Call write() on all associated component instances which were previously * retrieved through {@link getComponent()}, {@link getComponents()} or * {@link getManyManyComponents()} (Default: false) * @return int The ID of the record * @throws ValidationException Exception that can be caught and handled by the calling function */ public function write($showDebug = false, $forceInsert = false, $forceWrite = false, $writeComponents = false) { $firstWrite = false; $this->brokenOnWrite = true; $isNewRecord = false; $writeException = null; if ($this->ObsoleteClassName) { $writeException = new ValidationException( "Object is of class '{$this->ObsoleteClassName}' which doesn't exist - ". "you need to change the ClassName before you can write it", E_USER_WARNING ); } else if(Config::inst()->get('DataObject', 'validation_enabled')) { $valid = $this->validate(); if (!$valid->valid()) { $writeException = new ValidationException( $valid, $valid->message(), E_USER_WARNING ); } } if($writeException) { // Used by DODs to clean up after themselves, eg, Versioned $this->invokeWithExtensions('onAfterSkippedWrite'); throw $writeException; 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) && method_exists($v, 'isChanged') && $v->isChanged()) { $this->changed[$k] = self::CHANGE_VALUE; } } } else{ $dbCommand = 'insert'; $this->changed = array(); foreach($this->record as $k => $v) { $this->changed[$k] = self::CHANGE_VALUE; } $firstWrite = true; } // No changes made if($this->changed || $forceWrite) { foreach($this->getClassAncestry() as $ancestor) { if(self::has_own_table($ancestor)) $ancestry[] = $ancestor; } // Look for some changes to make if(!$forceInsert) unset($this->changed['ID']); $hasChanges = false; if (!$forceWrite) { 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 $baseTable = $ancestry[0]; if((!isset($this->record['ID']) || !$this->record['ID']) && isset($ancestry[0])) { DB::query("INSERT INTO \"{$baseTable}\" (\"Created\") VALUES (" . DB::getConn()->now() . ")"); $this->record['ID'] = DB::getGeneratedID($baseTable); $this->changed['ID'] = self::CHANGE_VALUE; $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_field('Varchar', $this->record[$fieldName], $fieldName); } // Both CompositeDBFields and regular fields need to be repopulated $fieldObj->setValue($this->record[$fieldName], $this->record); if($class != $baseTable || $fieldName!='ID') $fieldObj->writeToManipulation($manipulation[$class]); } } // Add the class name to the base object if($idx == 0) { $manipulation[$class]['fields']["LastEdited"] = "'".SS_Datetime::now()->Rfc2822()."'"; if($dbCommand == 'insert') { if(!empty($this->record["Created"])) { $manipulation[$class]['fields']["Created"] = DB::getConn()->prepStringForDB($this->record["Created"]); } else { $manipulation[$class]['fields']["Created"] = DB::getConn()->prepStringForDB(SS_Datetime::now()->Rfc2822()); } //echo "
  • $this->class - " .get_class($this); $manipulation[$class]['fields']["ClassName"] = DB::getConn()->prepStringForDB($this->class); } } // In cases where there are no fields, this 'stub' will get picked up on if(self::has_own_table($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($manipulation); // If there's any relations that couldn't be saved before, save them now (we have an ID here) if($this->unsavedRelations) { foreach($this->unsavedRelations as $name => $list) { $list->changeToList($this->$name()); } $this->unsavedRelations = array(); } $this->onAfterWrite(); $this->changed = null; } elseif ( $showDebug ) { echo "Debug: no changes for DataObject
    "; // Used by DODs to clean up after themselves, eg, Versioned $this->invokeWithExtensions('onAfterSkippedWrite'); } // Clears the cache for this object so get_one returns the correct object. $this->flushCache(); if(!isset($this->record['Created'])) { $this->record['Created'] = SS_Datetime::now()->Rfc2822(); } $this->record['LastEdited'] = SS_Datetime::now()->Rfc2822(); } else { // Used by DODs to clean up after themselves, eg, Versioned $this->invokeWithExtensions('onAfterSkippedWrite'); } // Write relations as necessary if($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 * @return DataObject $this */ public function writeComponents($recursive = false) { if(!$this->components) return $this; foreach($this->components as $component) { $component->write(false, false, false, $recursive); } return $this; } /** * Delete this data object. * $this->onBeforeDelete() gets called. * Note that in Versioned objects, both Stage and Live will be deleted. * @uses DataExtension->augmentSQL() */ public function delete() { $this->brokenOnDelete = true; $this->onBeforeDelete(); if($this->brokenOnDelete) { user_error("$this->class has a broken onBeforeDelete() function." . " Make sure that you call parent::onBeforeDelete().", E_USER_ERROR); } // Deleting a record without an ID shouldn't do anything if(!$this->ID) throw new LogicException("DataObject::delete() called on a DataObject without an ID"); // TODO: This is quite ugly. To improve: // - move the details of the delete code in the DataQuery system // - update the code to just delete the base table, and rely on cascading deletes in the DB to do the rest // obviously, that means getting requireTable() to configure cascading deletes ;-) $srcQuery = DataList::create($this->class, $this->model)->where("ID = $this->ID")->dataQuery()->query(); foreach($srcQuery->queriedTables() as $table) { $query = new SQLQuery("*", array('"' . $table . '"')); $query->setWhere("\"ID\" = $this->ID"); $query->setDelete(true); $query->execute(); } // Remove this item out of any caches $this->flushCache(); $this->onAfterDelete(); $this->OldID = $this->ID; $this->ID = 0; } /** * Delete the record with the given ID. * * @param string $className The class name of the record to be deleted * @param int $id ID of record to be deleted */ public static function delete_by_id($className, $id) { $obj = DataObject::get_by_id($className, $id); if($obj) { $obj->delete(); } else { user_error("$className object #$id wasn't found when calling DataObject::delete_by_id", E_USER_WARNING); } } /** * Get the class ancestry, including the current class name. * The ancestry will be returned as an array of class names, where the 0th element * will be the class that inherits directly from DataObject, and the last element * will be the current class. * * @return array Class ancestry */ public function getClassAncestry() { if(!isset(DataObject::$_cache_get_class_ancestry[$this->class])) { DataObject::$_cache_get_class_ancestry[$this->class] = array($this->class); while(($class=get_parent_class(DataObject::$_cache_get_class_ancestry[$this->class][0])) != "DataObject") { array_unshift(DataObject::$_cache_get_class_ancestry[$this->class], $class); } } return DataObject::$_cache_get_class_ancestry[$this->class]; } /** * Return a component object from a one to one relationship, as a DataObject. * If no component is available, an 'empty component' will be returned. * * @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($class = $this->has_one($componentName)) { $joinField = $componentName . 'ID'; $joinID = $this->getField($joinField); if($joinID) { $component = $this->model->$class->byID($joinID); } if(!isset($component) || !$component) { $component = $this->model->$class->newObject(); } } elseif($class = $this->belongs_to($componentName)) { $joinField = $this->getRemoteJoinField($componentName, 'belongs_to'); $joinID = $this->ID; if($joinID) { $component = DataObject::get_one($class, "\"$joinField\" = $joinID"); } if(!isset($component) || !$component) { $component = $this->model->$class->newObject(); $component->$joinField = $this->ID; } } else { throw new Exception("DataObject->getComponent(): Could not find component '$componentName'."); } $this->components[$componentName] = $component; return $component; } /** * Returns a one-to-many relation as a HasManyList * * @param string $componentName Name of the component * @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 $join Deprecated, use leftJoin($table, $joinClause) instead * @param string|array $limit A limit expression to be inserted into the LIMIT clause * * @return HasManyList The components of the one-to-many relationship. */ public function getComponents($componentName, $filter = "", $sort = "", $join = "", $limit = null) { $result = null; if(!$componentClass = $this->has_many($componentName)) { user_error("DataObject::getComponents(): Unknown 1-to-many component '$componentName'" . " on class '$this->class'", E_USER_ERROR); } if($join) { throw new \InvalidArgumentException( 'The $join argument has been removed. Use leftJoin($table, $joinClause) instead.' ); } // If we haven't been written yet, we can't save these relations, so use a list that handles this case if(!$this->ID) { if(!isset($this->unsavedRelations[$componentName])) { $this->unsavedRelations[$componentName] = new UnsavedRelationList($this->class, $componentName, $componentClass); } return $this->unsavedRelations[$componentName]; } $joinField = $this->getRemoteJoinField($componentName, 'has_many'); $result = HasManyList::create($componentClass, $joinField); if($this->model) $result->setDataModel($this->model); $result = $result->forForeignID($this->ID); $result = $result->where($filter)->limit($limit)->sort($sort); return $result; } /** * @deprecated 3.1 Use getComponents to get a filtered DataList for an object's relation */ public function getComponentsQuery($componentName, $filter = "", $sort = "", $join = "", $limit = "") { Deprecation::notice('3.1', "Use getComponents to get a filtered DataList for an object's relation"); return $this->getComponents($componentName, $filter, $sort, $join, $limit); } /** * Find the foreign class of a relation on this DataObject, regardless of the relation type. * * @param $relationName Relation name. * @return string Class name, or null if not found. */ public function getRelationClass($relationName) { // Go through all relationship configuration fields. $candidates = array_merge( ($relations = Config::inst()->get($this->class, 'has_one')) ? $relations : array(), ($relations = Config::inst()->get($this->class, 'has_many')) ? $relations : array(), ($relations = Config::inst()->get($this->class, 'many_many')) ? $relations : array(), ($relations = Config::inst()->get($this->class, 'belongs_many_many')) ? $relations : array(), ($relations = Config::inst()->get($this->class, 'belongs_to')) ? $relations : array() ); if (isset($candidates[$relationName])) { $remoteClass = $candidates[$relationName]; // If dot notation is present, extract just the first part that contains the class. if(($fieldPos = strpos($remoteClass, '.'))!==false) { return substr($remoteClass, 0, $fieldPos); } // Otherwise just return the class return $remoteClass; } return null; } /** * Tries to find the database key on another object that is used to store a relationship to this class. If no join * field can be found it defaults to 'ParentID'. * * @param string $component * @param string $type the join type - either 'has_many' or 'belongs_to' * @return string */ public function getRemoteJoinField($component, $type = 'has_many') { $remoteClass = $this->$type($component, false); if(!$remoteClass) { throw new Exception("Unknown $type component '$component' on class '$this->class'"); } if(!ClassInfo::exists(strtok($remoteClass, '.'))) { throw new Exception( "Class '$remoteClass' not found, but used in $type component '$component' on class '$this->class'" ); } if($fieldPos = strpos($remoteClass, '.')) { return substr($remoteClass, $fieldPos + 1) . 'ID'; } $remoteRelations = Config::inst()->get($remoteClass, 'has_one'); if(!is_array($remoteRelations)) { $remoteRelations = array(); } $remoteRelations = array_flip($remoteRelations); // look for remote has_one joins on this class or any parent classes foreach(array_reverse(ClassInfo::ancestry($this)) as $class) { if(array_key_exists($class, $remoteRelations)) return $remoteRelations[$class] . 'ID'; } $message = "No has_one found on class '$remoteClass'"; if($type == 'has_many') { // include a hint for has_many that is missing a has_one $message .= ", the has_many relation from '$this->class' to '$remoteClass'"; $message .= " requires a has_one on '$remoteClass'"; } throw new Exception($message); } /** * Returns a many-to-many component, as a ManyManyList. * @param string $componentName Name of the many-many component * @return ManyManyList The set of components * * @todo Implement query-params */ public function getManyManyComponents($componentName, $filter = "", $sort = "", $join = "", $limit = "") { list($parentClass, $componentClass, $parentField, $componentField, $table) = $this->many_many($componentName); // If we haven't been written yet, we can't save these relations, so use a list that handles this case if(!$this->ID) { if(!isset($this->unsavedRelations[$componentName])) { $this->unsavedRelations[$componentName] = new UnsavedRelationList($parentClass, $componentName, $componentClass); } return $this->unsavedRelations[$componentName]; } $result = ManyManyList::create($componentClass, $table, $componentField, $parentField, $this->many_many_extraFields($componentName)); if($this->model) $result->setDataModel($this->model); // If this is called on a singleton, then we return an 'orphaned relation' that can have the // foreignID set elsewhere. $result = $result->forForeignID($this->ID); return $result->where($filter)->sort($sort)->limit($limit); } /** * 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) { $hasOne = Config::inst()->get($class, 'has_one', Config::UNINHERITED); if(isset($hasOne[$component])) { return $hasOne[$component]; } } else { $newItems = (array)Config::inst()->get($class, 'has_one', Config::UNINHERITED); // Validate the data foreach($newItems as $k => $v) { if(!is_string($k) || is_numeric($k) || !is_string($v)) { user_error("$class::\$has_one has a bad entry: " . var_export($k,true). " => " . var_export($v,true) . ". Each map key should be a" . " relationship name, and the map value should be the data class to join to.", E_USER_ERROR); } } $items = isset($items) ? array_merge($newItems, (array)$items) : $newItems; } } return isset($items) ? $items : null; } /** * Returns the class of a remote belongs_to relationship. If no component is specified a map of all components and * their class name will be returned. * * @param string $component * @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have * the field data stripped off. It defaults to TRUE. * @return string|array */ public function belongs_to($component = null, $classOnly = true) { $belongsTo = $this->config()->belongs_to; if($component) { if($belongsTo && array_key_exists($component, $belongsTo)) { $belongsTo = $belongsTo[$component]; } else { return false; } } if($belongsTo && $classOnly) { return preg_replace('/(.+)?\..+/', '$1', $belongsTo); } else { return $belongsTo ? $belongsTo : array(); } } /** * Return all of the database fields defined in self::$db and all the parent classes. * Doesn't include any fields specified by self::$has_one. Use $this->has_one() to get these fields * * @param string $fieldName Limit the output to a specific field name * @return array The database fields */ public function db($fieldName = null) { $classes = ClassInfo::ancestry($this); $good = false; $items = array(); foreach($classes as $class) { // Wait until after we reach DataObject if(!$good) { if($class == 'DataObject') { $good = true; } continue; } if(isset(self::$_cache_db[$class])) { $dbItems = self::$_cache_db[$class]; } else { $dbItems = (array) Config::inst()->get($class, 'db', Config::UNINHERITED); self::$_cache_db[$class] = $dbItems; } if($fieldName) { if(isset($dbItems[$fieldName])) { return $dbItems[$fieldName]; } } else { // Validate the data foreach($dbItems as $k => $v) { if(!is_string($k) || is_numeric($k) || !is_string($v)) { user_error("$class::\$db has a bad entry: " . var_export($k,true). " => " . var_export($v,true) . ". Each map key should be a" . " property name, and the map value should be the property type.", E_USER_ERROR); } } $items = isset($items) ? array_merge((array) $items, $dbItems) : $dbItems; } } return $items; } /** * Gets the class of a one-to-many relationship. If no $component is specified then an array of all the one-to-many * relationships and their classes will be returned. * * @param string $component Name of component * @param bool $classOnly If this is TRUE, than any has_many relationships in the form "ClassName.Field" will have * the field data stripped off. It defaults to TRUE. * @return string|array */ public function has_many($component = null, $classOnly = true) { $hasMany = $this->config()->has_many; if($component) { if($hasMany && array_key_exists($component, $hasMany)) { $hasMany = $hasMany[$component]; } else { return false; } } if($hasMany && $classOnly) { return preg_replace('/(.+)?\..+/', '$1', $hasMany); } else { return $hasMany ? $hasMany : array(); } } /** * Return the many-to-many extra fields specification. * * If you don't specify a component name, it returns all * extra fields for all components available. * * @param string $component Name of component * @return array */ public function many_many_extraFields($component = null) { $classes = ClassInfo::ancestry($this); foreach($classes as $class) { if(in_array($class, array('ViewableData', 'Object', 'DataObject'))) continue; $relationName = null; // Find extra fields for one component if($component) { $SNG_class = singleton($class); $extraFields = $SNG_class->stat('many_many_extraFields'); // Extra fields are immediately available on this class if(isset($extraFields[$component])) { return $extraFields[$component]; } $manyMany = $SNG_class->stat('many_many'); $candidate = (isset($manyMany[$component])) ? $manyMany[$component] : null; if($candidate) { $SNG_candidate = singleton($candidate); $candidateManyMany = $SNG_candidate->stat('belongs_many_many'); // Find the relation given the class if($candidateManyMany) foreach($candidateManyMany as $relation => $relatedClass) { if($relatedClass == $class) { $relationName = $relation; break; } } if($relationName) { $extraFields = $SNG_candidate->stat('many_many_extraFields'); if(isset($extraFields[$relationName])) { return $extraFields[$relationName]; } } } $manyMany = $SNG_class->stat('belongs_many_many'); $candidate = (isset($manyMany[$component])) ? $manyMany[$component] : null; if($candidate) { $SNG_candidate = singleton($candidate); $candidateManyMany = $SNG_candidate->stat('many_many'); // Find the relation given the class if($candidateManyMany) foreach($candidateManyMany as $relation => $relatedClass) { if($relatedClass == $class) { $relationName = $relation; } } $extraFields = $SNG_candidate->stat('many_many_extraFields'); if(isset($extraFields[$relationName])) { return $extraFields[$relationName]; } } } else { // Find all the extra fields for all components $newItems = eval("return (array){$class}::\$many_many_extraFields;"); foreach($newItems as $k => $v) { if(!is_array($v)) { user_error( "$class::\$many_many_extraFields has a bad entry: " . var_export($k, true) . " => " . var_export($v, true) . ". Each many_many_extraFields entry should map to a field specification array.", E_USER_ERROR ); } } return isset($items) ? array_merge($newItems, $items) : $newItems; } } } /** * 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) { $manyMany = Config::inst()->get($class, 'many_many', Config::UNINHERITED); // 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 $belongsManyMany = Config::inst()->get($class, 'belongs_many_many', Config::UNINHERITED); $candidate = (isset($belongsManyMany[$component])) ? $belongsManyMany[$component] : null; if($candidate) { $childField = $candidate . "ID"; // We need to find the inverse component name $otherManyMany = Config::inst()->get($candidate, 'many_many', Config::UNINHERITED); 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" : $candidateClass . "ID"; return array($class, $candidate, $parentField, $childField, "{$candidate}_$inverseComponentName"); } } user_error("Orphaned \$belongs_many_many value for $this->class.$component", E_USER_ERROR); } } else { $newItems = (array)Config::inst()->get($class, 'many_many', Config::UNINHERITED); // Validate the data foreach($newItems as $k => $v) { if(!is_string($k) || is_numeric($k) || !is_string($v)) { user_error("$class::\$many_many has a bad entry: " . var_export($k,true). " => " . var_export($v,true) . ". Each map key should be a" . " relationship name, and the map value should be the data class to join to.", E_USER_ERROR); } } $items = isset($items) ? array_merge($newItems, $items) : $newItems; $newItems = (array)Config::inst()->get($class, 'belongs_many_many', Config::UNINHERITED); // Validate the data foreach($newItems as $k => $v) { if(!is_string($k) || is_numeric($k) || !is_string($v)) { user_error("$class::\$belongs_many_many has a bad entry: " . var_export($k,true). " => " . var_export($v,true) . ". Each map key should be a" . " relationship name, and the map value should be the data class to join to.", E_USER_ERROR); } } $items = isset($items) ? array_merge($newItems, $items) : $newItems; } } return isset($items) ? $items : null; } /** * This returns an array (if it exists) describing the database extensions that are required, or false if none * * This is experimental, and is currently only a Postgres-specific enhancement. * * @return array or false */ public function database_extensions($class){ $extensions = Config::inst()->get($class, 'database_extensions', Config::UNINHERITED); if($extensions) return $extensions; else return false; } /** * Generates a SearchContext to be used for building and processing * a generic search form for properties on this object. * * @return SearchContext */ public function getDefaultSearchContext() { return new SearchContext( $this->class, $this->scaffoldSearchFields(), $this->defaultSearchFilters() ); } /** * Determine which properties on the DataObject are * searchable, and map them to their default {@link FormField} * representations. Used for scaffolding a searchform for {@link ModelAdmin}. * * Some additional logic is included for switching field labels, based on * how generic or specific the field type is. * * Used by {@link SearchContext}. * * @param array $_params * 'fieldClasses': Associative array of field names as keys and FormField classes as values * 'restrictFields': Numeric array of a field name whitelist * @return FieldList */ public function scaffoldSearchFields($_params = null) { $params = array_merge( array( 'fieldClasses' => false, 'restrictFields' => false ), (array)$_params ); $fields = new FieldList(); foreach($this->searchableFields() as $fieldName => $spec) { if($params['restrictFields'] && !in_array($fieldName, $params['restrictFields'])) continue; // If a custom fieldclass is provided as a string, use it if($params['fieldClasses'] && isset($params['fieldClasses'][$fieldName])) { $fieldClass = $params['fieldClasses'][$fieldName]; $field = new $fieldClass($fieldName); // If we explicitly set a field, then construct that } else if(isset($spec['field'])) { // If it's a string, use it as a class name and construct if(is_string($spec['field'])) { $fieldClass = $spec['field']; $field = new $fieldClass($fieldName); // If it's a FormField object, then just use that object directly. } else if($spec['field'] instanceof FormField) { $field = $spec['field']; // Otherwise we have a bug } else { user_error("Bad value for searchable_fields, 'field' value: " . var_export($spec['field'], true), E_USER_WARNING); } // Otherwise, use the database field's scaffolder } else { $field = $this->relObject($fieldName)->scaffoldSearchField(); } if (strstr($fieldName, '.')) { $field->setName(str_replace('.', '__', $fieldName)); } $field->setTitle($spec['title']); $fields->push($field); } return $fields; } /** * Scaffold a simple edit form for all properties on this dataobject, * based on default {@link FormField} mapping in {@link DBField::scaffoldFormField()}. * Field labels/titles will be auto generated from {@link DataObject::fieldLabels()}. * * @uses FormScaffolder * * @param array $_params Associative array passing through properties to {@link FormScaffolder}. * @return FieldList */ public function scaffoldFormFields($_params = null) { $params = array_merge( array( 'tabbed' => false, 'includeRelations' => false, 'restrictFields' => false, 'fieldClasses' => false, 'ajaxSafe' => false ), (array)$_params ); $fs = new FormScaffolder($this); $fs->tabbed = $params['tabbed']; $fs->includeRelations = $params['includeRelations']; $fs->restrictFields = $params['restrictFields']; $fs->fieldClasses = $params['fieldClasses']; $fs->ajaxSafe = $params['ajaxSafe']; return $fs->getFieldList(); } /** * Allows user code to hook into DataObject::getCMSFields prior to updateCMSFields * being called on extensions * * @param callable $callback The callback to execute */ protected function beforeUpdateCMSFields($callback) { $this->beforeExtending('updateCMSFields', $callback); } /** * Centerpiece of every data administration interface in Silverstripe, * which returns a {@link FieldList} suitable for a {@link Form} object. * If not overloaded, we're using {@link scaffoldFormFields()} to automatically * generate this set. To customize, overload this method in a subclass * or extended onto it by using {@link DataExtension->updateCMSFields()}. * * * class MyCustomClass extends DataObject { * static $db = array('CustomProperty'=>'Boolean'); * * function getCMSFields() { * $fields = parent::getCMSFields(); * $fields->addFieldToTab('Root.Content',new CheckboxField('CustomProperty')); * return $fields; * } * } * * * @see Good example of complex FormField building: SiteTree::getCMSFields() * * @return FieldList Returns a TabSet for usage within the CMS - don't use for frontend forms. */ public function getCMSFields() { $tabbedFields = $this->scaffoldFormFields(array( // Don't allow has_many/many_many relationship editing before the record is first saved 'includeRelations' => ($this->ID > 0), 'tabbed' => true, 'ajaxSafe' => true )); $this->extend('updateCMSFields', $tabbedFields); return $tabbedFields; } /** * need to be overload by solid dataobject, so that the customised actions of that dataobject, * including that dataobject's extensions customised actions could be added to the EditForm. * * @return an Empty FieldList(); need to be overload by solid subclass */ public function getCMSActions() { $actions = new FieldList(); $this->extend('updateCMSActions', $actions); return $actions; } /** * Used for simple frontend forms without relation editing * or {@link TabSet} behaviour. Uses {@link scaffoldFormFields()} * by default. To customize, either overload this method in your * subclass, or extend it by {@link DataExtension->updateFrontEndFields()}. * * @todo Decide on naming for "website|frontend|site|page" and stick with it in the API * * @param array $params See {@link scaffoldFormFields()} * @return FieldList Always returns a simple field collection without TabSet. */ public function getFrontEndFields($params = null) { $untabbedFields = $this->scaffoldFormFields($params); $this->extend('updateFrontEndFields', $untabbedFields); return $untabbedFields; } /** * Gets the value of a field. * Called by {@link __get()} and any getFieldName() methods you might create. * * @param string $field The name of the field * * @return mixed The field value */ public function getField($field) { // If we already have an object in $this->record, then we should just return that if(isset($this->record[$field]) && is_object($this->record[$field])) return $this->record[$field]; // Do we have a field that needs to be lazy loaded? if(isset($this->record[$field.'_Lazy'])) { $tableClass = $this->record[$field.'_Lazy']; $this->loadLazyFields($tableClass); } // Otherwise, we need to determine if this is a complex field if(self::is_composite_field($this->class, $field)) { $helper = $this->castingHelper($field); $fieldObj = Object::create_from_string($helper, $field); $compositeFields = $fieldObj->compositeDatabaseFields(); foreach ($compositeFields as $compositeName => $compositeType) { if(isset($this->record[$field.$compositeName.'_Lazy'])) { $tableClass = $this->record[$field.$compositeName.'_Lazy']; $this->loadLazyFields($tableClass); } } // write value only if either the field value exists, // or a valid record has been loaded from the database $value = (isset($this->record[$field])) ? $this->record[$field] : null; if($value || $this->exists()) $fieldObj->setValue($value, $this->record, false); $this->record[$field] = $fieldObj; return $this->record[$field]; } return isset($this->record[$field]) ? $this->record[$field] : null; } /** * Loads all the stub fields that an initial lazy load didn't load fully. * * @param tableClass Base table to load the values from. Others are joined as required. * Not specifying a tableClass will load all lazy fields from all tables. */ protected function loadLazyFields($tableClass = null) { if (!$tableClass) { $loaded = array(); foreach ($this->record as $key => $value) { if (strlen($key) > 5 && substr($key, -5) == '_Lazy' && !array_key_exists($value, $loaded)) { $this->loadLazyFields($value); $loaded[$value] = $value; } } return; } $dataQuery = new DataQuery($tableClass); // TableField sets the record ID to "new" on new row data, so don't try doing anything in that case if(!is_numeric($this->record['ID'])) return false; // Limit query to the current record, unless it has the Versioned extension, // in which case it requires special handling through augmentLoadLazyFields() if(!$this->hasExtension('Versioned')) { $dataQuery->where("\"$tableClass\".\"ID\" = {$this->record['ID']}")->limit(1); } $columns = array(); // Add SQL for fields, both simple & multi-value // TODO: This is copy & pasted from buildSQL(), it could be moved into a method $databaseFields = self::database_fields($tableClass); if($databaseFields) foreach($databaseFields as $k => $v) { if(!isset($this->record[$k]) || $this->record[$k] === null) { $columns[] = $k; } } if ($columns) { $query = $dataQuery->query(); $this->extend('augmentLoadLazyFields', $query, $dataQuery, $this); $this->extend('augmentSQL', $query, $dataQuery); $dataQuery->setQueriedColumns($columns); $newData = $dataQuery->execute()->record(); // Load the data into record if($newData) { foreach($newData as $k => $v) { if (in_array($k, $columns)) { $this->record[$k] = $v; $this->original[$k] = $v; unset($this->record[$k . '_Lazy']); } } // No data means that the query returned nothing; assign 'null' to all the requested fields } else { foreach($columns as $k) { $this->record[$k] = null; $this->original[$k] = null; unset($this->record[$k . '_Lazy']); } } } } /** * Return the fields that have changed. * * The change level affects what the functions defines as "changed": * - Level CHANGE_STRICT (integer 1) will return strict changes, even !== ones. * - Level CHANGE_VALUE (integer 2) is more lenient, it will only return real data changes, * for example a change from 0 to null would not be included. * * Example return: * * array( * 'Title' = array('before' => 'Home', 'after' => 'Home-Changed', 'level' => DataObject::CHANGE_VALUE) * ) * * * @param boolean $databaseFieldsOnly Get only database fields that have changed * @param int $changeLevel The strictness of what is defined as change. Defaults to strict * @return array */ public function getChangedFields($databaseFieldsOnly = false, $changeLevel = self::CHANGE_STRICT) { $changedFields = array(); // Update the changed array with references to changed obj-fields foreach($this->record as $k => $v) { if(is_object($v) && method_exists($v, 'isChanged') && $v->isChanged()) { $this->changed[$k] = self::CHANGE_VALUE; } } if($databaseFieldsOnly) { $databaseFields = $this->inheritedDatabaseFields(); $databaseFields['ID'] = true; $databaseFields['LastEdited'] = true; $databaseFields['Created'] = true; $databaseFields['ClassName'] = true; $fields = array_intersect_key((array)$this->changed, $databaseFields); } else { $fields = $this->changed; } // Filter the list to those of a certain change level if($changeLevel > self::CHANGE_STRICT) { if($fields) foreach($fields as $name => $level) { if($level < $changeLevel) { unset($fields[$name]); } } } if($fields) foreach($fields as $name => $level) { $changedFields[$name] = array( 'before' => array_key_exists($name, $this->original) ? $this->original[$name] : null, 'after' => array_key_exists($name, $this->record) ? $this->record[$name] : null, 'level' => $level ); } return $changedFields; } /** * Uses {@link getChangedFields()} to determine if fields have been changed * since loading them from the database. * * @param string $fieldName Name of the database field to check, will check for any if not given * @param int $changeLevel See {@link getChangedFields()} * @return boolean */ public function isChanged($fieldName = null, $changeLevel = self::CHANGE_STRICT) { $changed = $this->getChangedFields(false, $changeLevel); if(!isset($fieldName)) { return !empty($changed); } else { return array_key_exists($fieldName, $changed); } } /** * Set the value of the field * Called by {@link __set()} and any setFieldName() methods you might create. * * @param string $fieldName Name of the field * @param mixed $val New field value * @return DataObject $this */ public function setField($fieldName, $val) { // Situation 1: Passing an DBField if($val instanceof DBField) { $val->Name = $fieldName; // If we've just lazy-loaded the column, then we need to populate the $original array by // called getField(). Too much overhead? Could this be done by a quicker method? Maybe only // on a call to getChanged()? $this->getField($fieldName); $this->record[$fieldName] = $val; // Situation 2: Passing a literal or non-DBField object } else { // If this is a proper database field, we shouldn't be getting non-DBField objects if(is_object($val) && $this->db($fieldName)) { user_error('DataObject::setField: passed an object that is not a DBField', E_USER_WARNING); } $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 // At the very least, the type has changed $this->changed[$fieldName] = self::CHANGE_STRICT; if((!isset($this->record[$fieldName]) && $val) || (isset($this->record[$fieldName]) && $this->record[$fieldName] != $val)) { // Value has changed as well, not just the type $this->changed[$fieldName] = self::CHANGE_VALUE; } // If we've just lazy-loaded the column, then we need to populate the $original array by // called getField(). Too much overhead? Could this be done by a quicker method? Maybe only // on a call to getChanged()? $this->getField($fieldName); // Value is always saved back when strict check succeeds. $this->record[$fieldName] = $val; } } return $this; } /** * Set the value of the field, using a casting object. * This is useful when you aren't sure that a date is in SQL format, for example. * setCastedField() can also be used, by forms, to set related data. For example, uploaded images * can be saved into the Image table. * * @param string $fieldName Name of the field * @param mixed $value New field value * @return DataObject $this */ public function setCastedField($fieldName, $val) { if(!$fieldName) { user_error("DataObject::setCastedField: Called without a fieldName", E_USER_ERROR); } $castingHelper = $this->castingHelper($fieldName); if($castingHelper) { $fieldObj = Object::create_from_string($castingHelper, $fieldName); $fieldObj->setValue($val); $fieldObj->saveInto($this); } else { $this->$fieldName = $val; } return $this; } /** * Returns true if the given field exists in a database column on any of * the objects tables and optionally look up a dynamic getter with * get(). * * @param string $field Name of the field * @return boolean True if the given field exists */ public function hasField($field) { return ( array_key_exists($field, $this->record) || $this->db($field) || (substr($field,-2) == 'ID') && $this->has_one(substr($field,0, -2)) || $this->hasMethod("get{$field}") ); } /** * Returns true if the given field exists as a database column * * @param string $field Name of the field * * @return boolean */ public function hasDatabaseField($field) { if(isset(self::$fixed_fields[$field])) return true; return array_key_exists($field, $this->inheritedDatabaseFields()); } /** * 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 "SS_Datetime"; if($field == "Created" && get_parent_class($this) == "DataObject") return "SS_Datetime"; // Add fields from Versioned extension if($field == 'Version' && $this->hasExtension('Versioned')) { return 'Int'; } // get cached fieldmap $fieldMap = isset(DataObject::$cache_has_own_table_field[$this->class]) ? DataObject::$cache_has_own_table_field[$this->class] : null; // if no fieldmap is cached, get all fields if(!$fieldMap) { $fieldMap = Config::inst()->get($this->class, 'db', Config::UNINHERITED); // all $db fields on this specific class (no parents) foreach(self::composite_fields($this->class, false) as $fieldname => $fieldtype) { $combined_db = singleton($fieldtype)->compositeDatabaseFields(); foreach($combined_db as $name => $type){ $fieldMap[$fieldname.$name] = $type; } } // all has_one relations on this specific class, // add foreign key $hasOne = Config::inst()->get($this->class, 'has_one', Config::UNINHERITED); if($hasOne) foreach($hasOne as $fieldName => $fieldSchema) { $fieldMap[$fieldName . 'ID'] = "ForeignKey"; } // set cached fieldmap DataObject::$cache_has_own_table_field[$this->class] = $fieldMap; } // Remove string-based "constructor-arguments" from the DBField definition if(isset($fieldMap[$field])) { if(is_string($fieldMap[$field])) return strtok($fieldMap[$field],'('); else return $fieldMap[$field]['type']; } } /** * Returns true if given class has its own table. Uses the rules for whether the table should exist rather than * actually looking in the database. * * @param string $dataClass * @return bool */ public static function has_own_table($dataClass) { if(!is_subclass_of($dataClass,'DataObject')) return false; if(!isset(DataObject::$cache_has_own_table[$dataClass])) { if(get_parent_class($dataClass) == 'DataObject') { DataObject::$cache_has_own_table[$dataClass] = true; } else { DataObject::$cache_has_own_table[$dataClass] = Config::inst()->get($dataClass, 'db', Config::UNINHERITED) || Config::inst()->get($dataClass, 'has_one', Config::UNINHERITED); } } return DataObject::$cache_has_own_table[$dataClass]; } /** * Returns true if the member is allowed to do the given action. * See {@link extendedCan()} for a more versatile tri-state permission control. * * @param string $perm The permission to be checked, such as 'View'. * @param Member $member The member whose permissions need checking. Defaults to the currently logged * in user. * * @return boolean True if the the member is allowed to do the given action */ public function can($perm, $member = null) { if(!isset($member)) { $member = Member::currentUser(); } if(Permission::checkMember($member, "ADMIN")) return true; if($this->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(); } $groupList = implode(', ', $groups->column("ID")); // TODO Fix relation table hardcoding $query = new SQLQuery( "\"Page_Can$perm\".PageID", array("\"Page_Can$perm\""), "GroupID IN ($groupList)"); $permissionCache[$memberID][$perm] = $query->execute()->column(); if($perm == "View") { // TODO Fix relation table hardcoding $query = new 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] = $unsecuredPages; } } Config::inst()->update($this->class, 'permissionCache', $permissionCache); } if($permissionCache[$memberID][$perm]) { return in_array($this->ID, $permissionCache[$memberID][$perm]); } } } else { return parent::can($perm, $member); } } /** * Process tri-state responses from permission-alterting extensions. The extensions are * expected to return one of three values: * * - false: Disallow this permission, regardless of what other extensions say * - true: Allow this permission, as long as no other extensions return false * - NULL: Don't affect the outcome * * This method itself returns a tri-state value, and is designed to be used like this: * * * $extended = $this->extendedCan('canDoSomething', $member); * if($extended !== null) return $extended; * else return $normalValue; * * * @param String $methodName Method on the same object, e.g. {@link canEdit()} * @param Member|int $member * @return boolean|null */ public function extendedCan($methodName, $member) { $results = $this->extend($methodName, $member); if($results && is_array($results)) { // Remove NULLs $results = array_filter($results, function($v) {return !is_null($v);}); // If there are any non-NULL responses, then return the lowest one of them. // If any explicitly deny the permission, then we don't get access if($results) return min($results); } return null; } /** * @param Member $member * @return boolean */ public function canView($member = null) { $extended = $this->extendedCan(__FUNCTION__, $member); if($extended !== null) { return $extended; } return Permission::check('ADMIN', 'any', $member); } /** * @param Member $member * @return boolean */ public function canEdit($member = null) { $extended = $this->extendedCan(__FUNCTION__, $member); if($extended !== null) { return $extended; } return Permission::check('ADMIN', 'any', $member); } /** * @param Member $member * @return boolean */ public function canDelete($member = null) { $extended = $this->extendedCan(__FUNCTION__, $member); if($extended !== null) { return $extended; } return Permission::check('ADMIN', 'any', $member); } /** * @todo Should canCreate be a static method? * * @param Member $member * @return boolean */ public function canCreate($member = null) { $extended = $this->extendedCan(__FUNCTION__, $member); if($extended !== null) { return $extended; } return Permission::check('ADMIN', 'any', $member); } /** * Debugging used by Debug::show() * * @return string HTML data representing this object */ public function debug() { $val = "

    Database record: $this->class

    \n
      \n"; if($this->record) foreach($this->record as $fieldName => $fieldVal) { $val .= "\t
    • $fieldName: " . Debug::text($fieldVal) . "
    • \n"; } $val .= "
    \n"; return $val; } /** * Return the DBField object that represents the given field. * This works similarly to obj() with 2 key differences: * - it still returns an object even when the field has no value. * - it only matches fields and not methods * - it matches foreign keys generated by has_one relationships, eg, "ParentID" * * @param string $fieldName Name of the field * @return DBField The field as a DBField object */ public function dbObject($fieldName) { // 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, $this); // Special case for ClassName } else if($fieldName == 'ClassName') { $val = get_class($this); return DBField::create_field('Varchar', $val, $fieldName, $this); } else if(array_key_exists($fieldName, self::$fixed_fields)) { return DBField::create_field(self::$fixed_fields[$fieldName], $this->$fieldName, $fieldName, $this); // General casting information for items in $db } else if($helper = $this->db($fieldName)) { $obj = Object::create_from_string($helper, $fieldName); $obj->setValue($this->$fieldName, $this->record, false); return $obj; // Special case for has_one relationships } else if(preg_match('/ID$/', $fieldName) && $this->has_one(substr($fieldName,0,-2))) { $val = $this->$fieldName; return DBField::create_field('ForeignKey', $val, $fieldName, $this); } } /** * Traverses to a DBField referenced by relationships between data objects. * * The path to the related field is specified with dot separated syntax * (eg: Parent.Child.Child.FieldName). * * @param string $fieldPath * * @return mixed DBField of the field on the object or a DataList instance. */ public function relObject($fieldPath) { $object = null; if(strpos($fieldPath, '.') !== false) { $parts = explode('.', $fieldPath); $fieldName = array_pop($parts); // Traverse dot syntax $component = $this; foreach($parts as $relation) { if($component instanceof SS_List) { if(method_exists($component,$relation)) { $component = $component->$relation(); } else { $component = $component->relation($relation); } } else { $component = $component->$relation(); } } $object = $component->dbObject($fieldName); } else { $object = $this->dbObject($fieldPath); } return $object; } /** * Traverses to a field referenced by relationships between data objects, returning the value * The path to the related field is specified with dot separated syntax (eg: Parent.Child.Child.FieldName) * * @param $fieldPath string * @return string | null - will return null on a missing value */ public function relField($fieldName) { $component = $this; // We're dealing with relations here so we traverse the dot syntax if(strpos($fieldName, '.') !== false) { $relations = explode('.', $fieldName); $fieldName = array_pop($relations); foreach($relations as $relation) { // Inspect $component for element $relation if($component->hasMethod($relation)) { // Check nested method $component = $component->$relation(); } elseif($component instanceof SS_List) { // Select adjacent relation from DataList $component = $component->relation($relation); } elseif($component instanceof DataObject && ($dbObject = $component->dbObject($relation)) ) { // Select db object $component = $dbObject; } else { user_error("$relation is not a relation/field on ".get_class($component), E_USER_ERROR); } } } // Bail if the component is null if(!$component) { return null; } if($component->hasMethod($fieldName)) { return $component->$fieldName(); } return $component->$fieldName; } /** * Temporary hack to return an association name, based on class, to get around the mangle * of having to deal with reverse lookup of relationships to determine autogenerated foreign keys. * * @return String */ public function getReverseAssociation($className) { if (is_array($this->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; } /** * 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 $join Deprecated 3.0 Join clause. Use leftJoin($table, $joinClause) instead. * @param string|array $limit A limit expression to be inserted into the LIMIT clause. * @param string $containerClass The container class to return the results in. * * @return DataList */ public static function get($callerClass = null, $filter = "", $sort = "", $join = "", $limit = null, $containerClass = 'DataList') { if($callerClass == null) { $callerClass = get_called_class(); if($callerClass == 'DataObject') { throw new \InvalidArgumentException('Call ::get() instead of DataObject::get()'); } if($filter || $sort || $join || $limit || ($containerClass != 'DataList')) { throw new \InvalidArgumentException('If calling ::get() then you shouldn\'t pass any other' . ' arguments'); } $result = DataList::create(get_called_class()); $result->setDataModel(DataModel::inst()); return $result; } if($join) { throw new \InvalidArgumentException( 'The $join argument has been removed. Use leftJoin($table, $joinClause) instead.' ); } $result = DataList::create($callerClass)->where($filter)->sort($sort); if($limit && strpos($limit, ',') !== false) { $limitArguments = explode(',', $limit); $result = $result->limit($limitArguments[1],$limitArguments[0]); } elseif($limit) { $result = $result->limit($limit); } $result->setDataModel(DataModel::inst()); return $result; } /** * @deprecated 3.1 Use DataList::create and DataList to do your querying */ public function Aggregate($class = null) { Deprecation::notice('3.1', 'Call aggregate methods on a DataList directly instead. In templates' . ' an example of the new syntax is <% cached List(Member).max(LastEdited) %> instead' . ' (check partial-caching.md documentation for more details.)'); if($class) { $list = new DataList($class); $list->setDataModel(DataModel::inst()); } else if(isset($this)) { $list = new DataList(get_class($this)); $list->setDataModel($this->model); } else { throw new \InvalidArgumentException("DataObject::aggregate() must be called as an instance method or passed" . " a classname"); } return $list; } /** * @deprecated 3.1 Use DataList::create and DataList to do your querying */ public function RelationshipAggregate($relationship) { Deprecation::notice('3.1', 'Call aggregate methods on a relationship directly instead.'); return $this->$relationship(); } /** * 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 = "") { $SNG = singleton($callerClass); $cacheKey = "{$filter}-{$orderby}"; if($extra = $SNG->extend('cacheKeyComponent')) { $cacheKey .= '-' . implode("-", $extra); } $cacheKey = md5($cacheKey); // Flush destroyed items out of the cache if($cache && isset(DataObject::$_cache_get_one[$callerClass][$cacheKey]) && DataObject::$_cache_get_one[$callerClass][$cacheKey] instanceof DataObject && DataObject::$_cache_get_one[$callerClass][$cacheKey]->destroyed) { DataObject::$_cache_get_one[$callerClass][$cacheKey] = false; } if(!$cache || !isset(DataObject::$_cache_get_one[$callerClass][$cacheKey])) { $dl = $callerClass::get()->where($filter)->sort($orderby); $item = $dl->First(); if($cache) { DataObject::$_cache_get_one[$callerClass][$cacheKey] = $item; if(!DataObject::$_cache_get_one[$callerClass][$cacheKey]) { DataObject::$_cache_get_one[$callerClass][$cacheKey] = false; } } } return $cache ? DataObject::$_cache_get_one[$callerClass][$cacheKey] : $item; } /** * Flush the cached results for all relations (has_one, has_many, many_many) * Also clears any cached aggregate data. * * @param boolean $persistent When true will also clear persistent data stored in the Cache system. * When false will just clear session-local cached data * @return DataObject $this */ public function flushCache($persistent = true) { if($persistent) Aggregate::flushCache($this->class); if($this->class == 'DataObject') { DataObject::$_cache_get_one = array(); return $this; } $classes = ClassInfo::ancestry($this->class); foreach($classes as $class) { if(isset(DataObject::$_cache_get_one[$class])) unset(DataObject::$_cache_get_one[$class]); } $this->extend('flushCache'); $this->components = array(); return $this; } /** * Flush the get_one global cache and destroy associated objects. */ public static function flush_and_destroy_cache() { if(DataObject::$_cache_get_one) foreach(DataObject::$_cache_get_one as $class => $items) { if(is_array($items)) foreach($items as $item) { if($item) $item->destroy(); } } DataObject::$_cache_get_one = array(); } /** * Reset all global caches associated with DataObject. */ public static function reset() { DataObject::$cache_has_own_table = array(); DataObject::$cache_has_own_table_field = array(); DataObject::$_cache_db = array(); DataObject::$_cache_get_one = array(); DataObject::$_cache_composite_fields = array(); DataObject::$_cache_custom_database_fields = array(); DataObject::$_cache_get_class_ancestry = array(); DataObject::$_cache_field_labels = array(); } /** * Return the given element, searching by ID * * @param string $callerClass The class of the object to be returned * @param int $id The id of the element * @param boolean $cache See {@link get_one()} * * @return DataObject The element */ public static function get_by_id($callerClass, $id, $cache = true) { if(is_numeric($id)) { if(is_subclass_of($callerClass, 'DataObject')) { $baseClass = ClassInfo::baseDataClass($callerClass); return DataObject::get_one($callerClass,"\"$baseClass\".\"ID\" = $id", $cache); // This simpler code will be used by non-DataObject classes that implement DataObjectInterface } else { return DataObject::get_one($callerClass,"\"ID\" = $id", $cache); } } else { user_error("DataObject::get_by_id passed a non-numeric ID #$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); } /** * @var Array Parameters used in the query that built this object. * This can be used by decorators (e.g. lazy loading) to * run additional queries using the same context. */ protected $sourceQueryParams; /** * @see $sourceQueryParams * @return array */ public function getSourceQueryParams() { return $this->sourceQueryParams; } /** * @see $sourceQueryParams * @param array */ public function setSourceQueryParams($array) { $this->sourceQueryParams = $array; } /** * @see $sourceQueryParams * @param array */ public function setSourceQueryParam($key, $value) { $this->sourceQueryParams[$key] = $value; } /** * @see $sourceQueryParams * @return Mixed */ public function getSourceQueryParam($key) { if(isset($this->sourceQueryParams[$key])) return $this->sourceQueryParams[$key]; else return null; } //-------------------------------------------------------------------------------------------// /** * Return the database indexes on this table. * This array is indexed by the name of the field with the index, and * the value is the type of index. */ public function databaseIndexes() { $has_one = $this->uninherited('has_one',true); $classIndexes = $this->uninherited('indexes',true); //$fileIndexes = $this->uninherited('fileIndexes', true); $indexes = array(); if($has_one) { foreach($has_one as $relationshipName => $fieldType) { $indexes[$relationshipName . 'ID'] = true; } } if($classIndexes) { foreach($classIndexes as $indexName => $indexType) { $indexes[$indexName] = $indexType; } } if(get_parent_class($this) == "DataObject") { $indexes['ClassName'] = true; } return $indexes; } /** * Check the database schema and update it as necessary. * * @uses DataExtension->augmentDatabase() */ public function requireTable() { // Only build the table if we've actually got fields $fields = self::database_fields($this->class); $extensions = self::database_extensions($this->class); $indexes = $this->databaseIndexes(); if($fields) { $hasAutoIncPK = ($this->class == ClassInfo::baseDataClass($this->class)); DB::requireTable($this->class, $fields, $indexes, $hasAutoIncPK, $this->stat('create_table_options'), $extensions); } else { DB::dontRequireTable($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(isset($extras[$relationship])) { $manymanyFields = array_merge($manymanyFields, $extras[$relationship]); } // Build index list $manymanyIndexes = array( "{$this->class}ID" => true, (($this->class == $childClass) ? "ChildID" : "{$childClass}ID") => true, ); DB::requireTable("{$this->class}_$relationship", $manymanyFields, $manymanyIndexes, true, null, $extensions); } } // 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(). * * @uses DataExtension->requireDefaultRecords() */ public function requireDefaultRecords() { $defaultRecords = $this->stat('default_records'); if(!empty($defaultRecords)) { $hasData = DataObject::get_one($this->class); if(!$hasData) { $className = $this->class; foreach($defaultRecords as $record) { $obj = $this->model->$className->newObject($record); $obj->write(); } DB::alteration_message("Added default records to $className table","created"); } } // Let any extentions make their own database default data $this->extend('requireDefaultRecords', $dummy); } /** * 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 = $this->class; while($currentObj != 'DataObject') { $fields = array_merge($fields, self::custom_database_fields($currentObj)); $currentObj = get_parent_class($currentObj); } return (array) $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) { $summaryFields = array_keys($this->summaryFields()); $fields = array(); // remove the custom getters as the search should not include. if($summaryFields) { foreach($summaryFields as $key => $name) { if($this->hasDatabaseField($name) || $this->relObject($name)) { $fields[] = $name; } } } } // we need to make sure the format is unified before // augmenting fields, so extensions can apply consistent checks // but also after augmenting fields, because the extension // might use the shorthand notation as well // rewrite array, if it is using shorthand syntax $rewrite = array(); foreach($fields as $name => $specOrName) { $identifer = (is_int($name)) ? $specOrName : $name; if(is_int($name)) { // Format: array('MyFieldName') $rewrite[$identifer] = array(); } elseif(is_array($specOrName)) { // Format: array('MyFieldName' => array( // 'filter => 'ExactMatchFilter', // 'field' => 'NumericField', // optional // 'title' => 'My Title', // 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 DataExtensions if present $this->extend('updateSearchableFields', $fields); return $fields; } /** * Get any user defined searchable fields labels that * exist. Allows overriding of default field names in the form * interface actually presented to the user. * * The reason for keeping this separate from searchable_fields, * which would be a logical place for this functionality, is to * avoid bloating and complicating the configuration array. Currently * much of this system is based on sensible defaults, and this property * would generally only be set in the case of more complex relationships * between data object being required in the search interface. * * Generates labels based on name of the field itself, if no static property * {@link self::field_labels} exists. * * @uses $field_labels * @uses FormField::name_to_label() * * @param boolean $includerelations a boolean value to indicate if the labels returned include relation fields * * @return array|string Array of all element labels if no argument given, otherwise the label of the field */ public function fieldLabels($includerelations = true) { $cacheKey = $this->class . '_' . $includerelations; if(!isset(self::$_cache_field_labels[$cacheKey])) { $customLabels = $this->stat('field_labels'); $autoLabels = array(); // get all translated static properties as defined in i18nCollectStatics() $ancestry = ClassInfo::ancestry($this->class); $ancestry = array_reverse($ancestry); if($ancestry) foreach($ancestry as $ancestorClass) { if($ancestorClass == 'ViewableData') break; $types = array( 'db' => (array)Config::inst()->get($ancestorClass, 'db', Config::UNINHERITED) ); if($includerelations){ $types['has_one'] = (array)singleton($ancestorClass)->uninherited('has_one', true); $types['has_many'] = (array)singleton($ancestorClass)->uninherited('has_many', true); $types['many_many'] = (array)singleton($ancestorClass)->uninherited('many_many', true); } foreach($types as $type => $attrs) { foreach($attrs as $name => $spec) { $autoLabels[$name] = _t("{$ancestorClass}.{$type}_{$name}",FormField::name_to_label($name)); } } } $labels = array_merge((array)$autoLabels, (array)$customLabels); $this->extend('updateFieldLabels', $labels); self::$_cache_field_labels[$cacheKey] = $labels; } return self::$_cache_field_labels[$cacheKey]; } /** * Get a human-readable label for a single field, * see {@link fieldLabels()} for more details. * * @uses fieldLabels() * @uses FormField::name_to_label() * * @param string $name Name of the field * @return string Label of the field */ public function fieldLabel($name) { $labels = $this->fieldLabels(); return (isset($labels[$name])) ? $labels[$name] : FormField::name_to_label($name); } /** * Get the default summary fields for this object. * * @todo use the translation apparatus to return a default field selection for the language * * @return array */ public function summaryFields(){ $fields = $this->stat('summary_fields'); // if fields were passed in numeric array, // convert to an associative array if($fields && array_key_exists(0, $fields)) { $fields = array_combine(array_values($fields), array_values($fields)); } if (!$fields) { $fields = array(); // try to scaffold a couple of usual suspects if ($this->hasField('Name')) $fields['Name'] = 'Name'; if ($this->hasDataBaseField('Title')) $fields['Title'] = 'Title'; if ($this->hasField('Description')) $fields['Description'] = 'Description'; if ($this->hasField('FirstName')) $fields['FirstName'] = 'First Name'; } $this->extend("updateSummaryFields", $fields); // Final fail-over, just list ID field if(!$fields) $fields['ID'] = 'ID'; // Localize fields (if possible) foreach($this->fieldLabels(false) as $name => $label) { if(isset($fields[$name])) $fields[$name] = $label; } return $fields; } /** * Defines a default list of filters for the search context. * * If a filter class mapping is defined on the data object, * it is constructed here. Otherwise, the default filter specified in * {@link DBField} is used. * * @todo error handling/type checking for valid FormField and SearchFilter subclasses? * * @return array */ public function defaultSearchFilters() { $filters = array(); foreach($this->searchableFields() as $name => $spec) { $filterClass = $spec['filter']; if($spec['filter'] instanceof SearchFilter) { $filters[$name] = $spec['filter']; } else { $class = $spec['filter']; if(!is_subclass_of($spec['filter'], 'SearchFilter')) { $class = 'PartialMatchFilter'; } $filters[$name] = new $class($name); } } return $filters; } /** * @return boolean True if the object is in the database */ public function isInDB() { return is_numeric( $this->ID ) && $this->ID > 0; } /* * @ignore */ private static $subclass_access = true; /** * Temporarily disable subclass access in data object qeur */ public static function disable_subclass_access() { self::$subclass_access = false; } public static function enable_subclass_access() { self::$subclass_access = true; } //-------------------------------------------------------------------------------------------// /** * Database field definitions. * This is a map from field names to field type. The field * type should be a class that extends . * @var array * @config */ private static $db = null; /** * Use a casting object for a field. This is a map from * field name to class name of the casting object. * @var array */ private static $casting = array( "LastEdited" => "SS_Datetime", "Created" => "SS_Datetime", "Title" => 'Text', ); /** * Specify custom options for a CREATE TABLE call. * Can be used to specify a custom storage engine for specific database table. * All options have to be keyed for a specific database implementation, * identified by their class name (extending from {@link SS_Database}). * * * array( * 'MySQLDatabase' => 'ENGINE=MyISAM' * ) * * * Caution: This API is experimental, and might not be * included in the next major release. Please use with care. * * @var array * @config */ private static $create_table_options = array( 'MySQLDatabase' => 'ENGINE=InnoDB' ); /** * If a field is in this array, then create a database index * on that field. This is a map from fieldname to index type. * See {@link SS_Database->requireIndex()} and custom subclasses for details on the array notation. * * @var array * @config */ private static $indexes = null; /** * Inserts standard column-values when a DataObject * is instanciated. Does not insert default records {@see $default_records}. * This is a map from fieldname to default value. * * - If you would like to change a default value in a sub-class, just specify it. * - If you would like to disable the default value given by a parent class, set the default value to 0,'', * or false in your subclass. Setting it to null won't work. * * @var array * @config */ private static $defaults = null; /** * Multidimensional array which inserts default data into the database * on a db/build-call as long as the database-table is empty. Please use this only * for simple constructs, not for SiteTree-Objects etc. which need special * behaviour such as publishing and ParentNodes. * * Example: * array( * array('Title' => "DefaultPage1", 'PageTitle' => 'page1'), * array('Title' => "DefaultPage2") * ). * * @var array * @config */ private static $default_records = null; /** * One-to-zero relationship defintion. This is a map of component name to data type. In order to turn this into a * true one-to-one relationship you can add a {@link DataObject::$belongs_to} relationship on the child class. * * Note that you cannot have a has_one and belongs_to relationship with the same name. * * @var array * @config */ private static $has_one = null; /** * A meta-relationship that allows you to define the reverse side of a {@link DataObject::$has_one}. * * This does not actually create any data structures, but allows you to query the other object in a one-to-one * relationship from the child object. If you have multiple belongs_to links to another object you can use the * syntax "ClassName.HasOneName" to specify which foreign has_one key on the other object to use. * * Note that you cannot have a has_one and belongs_to relationship with the same name. * * @var array * @config */ private static $belongs_to; /** * This defines a one-to-many relationship. It is a map of component name to the remote data class. * * This relationship type does not actually create a data structure itself - you need to define a matching $has_one * relationship on the child class. Also, if the $has_one relationship on the child class has multiple links to this * class you can use the syntax "ClassName.HasOneRelationshipName" in the remote data class definition to show * which foreign key to use. * * @var array * @config */ private static $has_many = null; /** * many-many relationship definitions. * This is a map from component name to data type. * @var array * @config */ private static $many_many = null; /** * Extra fields to include on the connecting many-many table. * This is a map from field name to field type. * * Example code: * * public static $many_many_extraFields = array( * 'Members' => array( * 'Role' => 'Varchar(100)' * ) * ); * * * @var array * @config */ private static $many_many_extraFields = null; /** * The inverse side of a many-many relationship. * This is a map from component name to data type. * @var array * @config */ private static $belongs_many_many = null; /** * The default sort expression. This will be inserted in the ORDER BY * clause of a SQL query if no other sort expression is provided. * @var string * @config */ private static $default_sort = null; /** * Default list of fields that can be scaffolded by the ModelAdmin * search interface. * * Overriding the default filter, with a custom defined filter: * * static $searchable_fields = array( * "Name" => "PartialMatchFilter" * ); * * * Overriding the default form fields, with a custom defined field. * The 'filter' parameter will be generated from {@link DBField::$default_search_filter_class}. * The 'title' parameter will be generated from {@link DataObject->fieldLabels()}. * * static $searchable_fields = array( * "Name" => array( * "field" => "TextField" * ) * ); * * * Overriding the default form field, filter and title: * * static $searchable_fields = array( * "Organisation.ZipCode" => array( * "field" => "TextField", * "filter" => "PartialMatchFilter", * "title" => 'Organisation ZIP' * ) * ); * * @config */ private static $searchable_fields = null; /** * User defined labels for searchable_fields, used to override * default display in the search form. * @config */ private static $field_labels = null; /** * Provides a default list of fields to be used by a 'summary' * view of this object. * @config */ private static $summary_fields = null; /** * Provides a list of allowed methods that can be called via RESTful api. */ public static $allowed_actions = null; /** * Collect all static properties on the object * which contain natural language, and need to be translated. * The full entity name is composed from the class name and a custom identifier. * * @return array A numerical array which contains one or more entities in array-form. * Each numeric entity array contains the "arguments" for a _t() call as array values: * $entity, $string, $priority, $context. */ public function provideI18nEntities() { $entities = array(); $entities["{$this->class}.SINGULARNAME"] = array( $this->singular_name(), 'Singular name of the object, used in dropdowns and to generally identify a single object in the interface' ); $entities["{$this->class}.PLURALNAME"] = array( $this->plural_name(), 'Pural name of the object, used in dropdowns and to generally identify a collection of this object in the' . ' interface' ); return $entities; } /** * Returns true if the given method/parameter has a value * (Uses the DBField::hasValue if the parameter is a database field) * * @param string $field The field name * @param array $arguments * @param bool $cache * @return boolean */ public function hasValue($field, $arguments = null, $cache = true) { $obj = $this->dbObject($field); if($obj) { return $obj->exists(); } else { return parent::hasValue($field, $arguments, $cache); } } }