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Code Editor : entity.inc
<?php /** * Interface for entity controller classes. * * All entity controller classes specified via the 'controller class' key * returned by hook_entity_info() or hook_entity_info_alter() have to implement * this interface. * * Most simple, SQL-based entity controllers will do better by extending * DrupalDefaultEntityController instead of implementing this interface * directly. */ interface DrupalEntityControllerInterface { /** * Resets the internal, static entity cache. * * @param $ids * (optional) If specified, the cache is reset for the entities with the * given ids only. */ public function resetCache(array $ids = NULL); /** * Loads one or more entities. * * @param $ids * An array of entity IDs, or FALSE to load all entities. * @param $conditions * An array of conditions. Keys are field names on the entity's base table. * Values will be compared for equality. All the comparisons will be ANDed * together. This parameter is deprecated; use an EntityFieldQuery instead. * * @return * An array of entity objects indexed by their ids. When no results are * found, an empty array is returned. */ public function load($ids = array(), $conditions = array()); } /** * Default implementation of DrupalEntityControllerInterface. * * This class can be used as-is by most simple entity types. Entity types * requiring special handling can extend the class. */ class DrupalDefaultEntityController implements DrupalEntityControllerInterface { /** * Static cache of entities, keyed by entity ID. * * @var array */ protected $entityCache; /** * Entity type for this controller instance. * * @var string */ protected $entityType; /** * Array of information about the entity. * * @var array * * @see entity_get_info() */ protected $entityInfo; /** * Additional arguments to pass to hook_TYPE_load(). * * Set before calling DrupalDefaultEntityController::attachLoad(). * * @var array */ protected $hookLoadArguments; /** * Name of the entity's ID field in the entity database table. * * @var string */ protected $idKey; /** * Name of entity's revision database table field, if it supports revisions. * * Has the value FALSE if this entity does not use revisions. * * @var string */ protected $revisionKey; /** * The table that stores revisions, if the entity supports revisions. * * @var string */ protected $revisionTable; /** * Whether this entity type should use the static cache. * * Set by entity info. * * @var boolean */ protected $cache; /** * Constructor: sets basic variables. * * @param $entityType * The entity type for which the instance is created. */ public function __construct($entityType) { $this->entityType = $entityType; $this->entityInfo = entity_get_info($entityType); $this->entityCache = array(); $this->hookLoadArguments = array(); $this->idKey = $this->entityInfo['entity keys']['id']; // Check if the entity type supports revisions. if (!empty($this->entityInfo['entity keys']['revision'])) { $this->revisionKey = $this->entityInfo['entity keys']['revision']; $this->revisionTable = $this->entityInfo['revision table']; } else { $this->revisionKey = FALSE; } // Check if the entity type supports static caching of loaded entities. $this->cache = !empty($this->entityInfo['static cache']); } /** * Implements DrupalEntityControllerInterface::resetCache(). */ public function resetCache(array $ids = NULL) { if (isset($ids)) { foreach ($ids as $id) { unset($this->entityCache[$id]); } } else { $this->entityCache = array(); } } /** * Implements DrupalEntityControllerInterface::load(). */ public function load($ids = array(), $conditions = array()) { $entities = array(); // Revisions are not statically cached, and require a different query to // other conditions, so separate the revision id into its own variable. if ($this->revisionKey && isset($conditions[$this->revisionKey])) { $revision_id = $conditions[$this->revisionKey]; unset($conditions[$this->revisionKey]); } else { $revision_id = FALSE; } // Create a new variable which is either a prepared version of the $ids // array for later comparison with the entity cache, or FALSE if no $ids // were passed. The $ids array is reduced as items are loaded from cache, // and we need to know if it's empty for this reason to avoid querying the // database when all requested entities are loaded from cache. $passed_ids = !empty($ids) ? array_flip($ids) : FALSE; // Try to load entities from the static cache, if the entity type supports // static caching. if ($this->cache && !$revision_id) { $entities += $this->cacheGet($ids, $conditions); // If any entities were loaded, remove them from the ids still to load. if ($passed_ids) { $ids = array_keys(array_diff_key($passed_ids, $entities)); } } // Ensure integer entity IDs are valid. if (!empty($ids)) { $this->cleanIds($ids); } // Load any remaining entities from the database. This is the case if $ids // is set to FALSE (so we load all entities), if there are any ids left to // load, if loading a revision, or if $conditions was passed without $ids. if ($ids === FALSE || $ids || $revision_id || ($conditions && !$passed_ids)) { // Build the query. $query = $this->buildQuery($ids, $conditions, $revision_id); $queried_entities = $query ->execute() ->fetchAllAssoc($this->idKey); } // Pass all entities loaded from the database through $this->attachLoad(), // which attaches fields (if supported by the entity type) and calls the // entity type specific load callback, for example hook_node_load(). if (!empty($queried_entities)) { $this->attachLoad($queried_entities, $revision_id); $entities += $queried_entities; } if ($this->cache) { // Add entities to the cache if we are not loading a revision. if (!empty($queried_entities) && !$revision_id) { $this->cacheSet($queried_entities); } } // Ensure that the returned array is ordered the same as the original // $ids array if this was passed in and remove any invalid ids. if ($passed_ids) { // Remove any invalid ids from the array. $passed_ids = array_intersect_key($passed_ids, $entities); foreach ($entities as $entity) { $passed_ids[$entity->{$this->idKey}] = $entity; } $entities = $passed_ids; } return $entities; } /** * Ensures integer entity IDs are valid. * * The identifier sanitization provided by this method has been introduced * as Drupal used to rely on the database to facilitate this, which worked * correctly with MySQL but led to errors with other DBMS such as PostgreSQL. * * @param array $ids * The entity IDs to verify. Non-integer IDs are removed from this array if * the entity type requires IDs to be integers. */ protected function cleanIds(&$ids) { $entity_info = entity_get_info($this->entityType); if (isset($entity_info['base table field types'])) { $id_type = $entity_info['base table field types'][$this->idKey]; if ($id_type == 'serial' || $id_type == 'int') { $ids = array_filter($ids, array($this, 'filterId')); $ids = array_map('intval', $ids); } } } /** * Callback for array_filter that removes non-integer IDs. */ protected function filterId($id) { return is_numeric($id) && $id == (int) $id; } /** * Builds the query to load the entity. * * This has full revision support. For entities requiring special queries, * the class can be extended, and the default query can be constructed by * calling parent::buildQuery(). This is usually necessary when the object * being loaded needs to be augmented with additional data from another * table, such as loading node type into comments or vocabulary machine name * into terms, however it can also support $conditions on different tables. * See CommentController::buildQuery() or TaxonomyTermController::buildQuery() * for examples. * * @param $ids * An array of entity IDs, or FALSE to load all entities. * @param $conditions * An array of conditions. Keys are field names on the entity's base table. * Values will be compared for equality. All the comparisons will be ANDed * together. This parameter is deprecated; use an EntityFieldQuery instead. * @param $revision_id * The ID of the revision to load, or FALSE if this query is asking for the * most current revision(s). * * @return SelectQuery * A SelectQuery object for loading the entity. */ protected function buildQuery($ids, $conditions = array(), $revision_id = FALSE) { $query = db_select($this->entityInfo['base table'], 'base'); $query->addTag($this->entityType . '_load_multiple'); if ($revision_id) { $query->join($this->revisionTable, 'revision', "revision.{$this->idKey} = base.{$this->idKey} AND revision.{$this->revisionKey} = :revisionId", array(':revisionId' => $revision_id)); } elseif ($this->revisionKey) { $query->join($this->revisionTable, 'revision', "revision.{$this->revisionKey} = base.{$this->revisionKey}"); } // Add fields from the {entity} table. $entity_fields = $this->entityInfo['schema_fields_sql']['base table']; if ($this->revisionKey) { // Add all fields from the {entity_revision} table. $entity_revision_fields = drupal_map_assoc($this->entityInfo['schema_fields_sql']['revision table']); // The id field is provided by entity, so remove it. unset($entity_revision_fields[$this->idKey]); // Remove all fields from the base table that are also fields by the same // name in the revision table. $entity_field_keys = array_flip($entity_fields); foreach ($entity_revision_fields as $key => $name) { if (isset($entity_field_keys[$name])) { unset($entity_fields[$entity_field_keys[$name]]); } } $query->fields('revision', $entity_revision_fields); } $query->fields('base', $entity_fields); if ($ids) { $query->condition("base.{$this->idKey}", $ids, 'IN'); } if ($conditions) { foreach ($conditions as $field => $value) { $query->condition('base.' . $field, $value); } } return $query; } /** * Attaches data to entities upon loading. * * This will attach fields, if the entity is fieldable. It calls * hook_entity_load() for modules which need to add data to all entities. * It also calls hook_TYPE_load() on the loaded entities. For example * hook_node_load() or hook_user_load(). If your hook_TYPE_load() * expects special parameters apart from the queried entities, you can set * $this->hookLoadArguments prior to calling the method. * See NodeController::attachLoad() for an example. * * @param $queried_entities * Associative array of query results, keyed on the entity ID. * @param $revision_id * ID of the revision that was loaded, or FALSE if the most current revision * was loaded. */ protected function attachLoad(&$queried_entities, $revision_id = FALSE) { // Attach fields. if ($this->entityInfo['fieldable']) { if ($revision_id) { field_attach_load_revision($this->entityType, $queried_entities); } else { field_attach_load($this->entityType, $queried_entities); } } // Call hook_entity_load(). foreach (module_implements('entity_load') as $module) { $function = $module . '_entity_load'; $function($queried_entities, $this->entityType); } // Call hook_TYPE_load(). The first argument for hook_TYPE_load() are // always the queried entities, followed by additional arguments set in // $this->hookLoadArguments. $args = array_merge(array($queried_entities), $this->hookLoadArguments); foreach (module_implements($this->entityInfo['load hook']) as $module) { call_user_func_array($module . '_' . $this->entityInfo['load hook'], $args); } } /** * Gets entities from the static cache. * * @param $ids * If not empty, return entities that match these IDs. * @param $conditions * If set, return entities that match all of these conditions. * * @return * Array of entities from the entity cache. */ protected function cacheGet($ids, $conditions = array()) { $entities = array(); // Load any available entities from the internal cache. if (!empty($this->entityCache)) { if ($ids) { $entities += array_intersect_key($this->entityCache, array_flip($ids)); } // If loading entities only by conditions, fetch all available entities // from the cache. Entities which don't match are removed later. elseif ($conditions) { $entities = $this->entityCache; } } // Exclude any entities loaded from cache if they don't match $conditions. // This ensures the same behavior whether loading from memory or database. if ($conditions) { foreach ($entities as $entity) { // Iterate over all conditions and compare them to the entity // properties. We cannot use array_diff_assoc() here since the // conditions can be nested arrays, too. foreach ($conditions as $property_name => $condition) { if (is_array($condition)) { // Multiple condition values for one property are treated as OR // operation: only if the value is not at all in the condition array // we remove the entity. if (!in_array($entity->{$property_name}, $condition)) { unset($entities[$entity->{$this->idKey}]); continue 2; } } elseif ($condition != $entity->{$property_name}) { unset($entities[$entity->{$this->idKey}]); continue 2; } } } } return $entities; } /** * Stores entities in the static entity cache. * * @param $entities * Entities to store in the cache. */ protected function cacheSet($entities) { $this->entityCache += $entities; } } /** * Exception thrown by EntityFieldQuery() on unsupported query syntax. * * Some storage modules might not support the full range of the syntax for * conditions, and will raise an EntityFieldQueryException when an unsupported * condition was specified. */ class EntityFieldQueryException extends Exception {} /** * Retrieves entities matching a given set of conditions. * * This class allows finding entities based on entity properties (for example, * node->changed), field values, and generic entity meta data (bundle, * entity type, entity id, and revision ID). It is not possible to query across * multiple entity types. For example, there is no facility to find published * nodes written by users created in the last hour, as this would require * querying both node->status and user->created. * * Normally we would not want to have public properties on the object, as that * allows the object's state to become inconsistent too easily. However, this * class's standard use case involves primarily code that does need to have * direct access to the collected properties in order to handle alternate * execution routines. We therefore use public properties for simplicity. Note * that code that is simply creating and running a field query should still use * the appropriate methods to add conditions on the query. * * Storage engines are not required to support every type of query. By default, * an EntityFieldQueryException will be raised if an unsupported condition is * specified or if the query has field conditions or sorts that are stored in * different field storage engines. However, this logic can be overridden in * hook_entity_query_alter(). * * Also note that this query does not automatically respect entity access * restrictions. Node access control is performed by the SQL storage engine but * other storage engines might not do this. */ class EntityFieldQuery { /** * Indicates that both deleted and non-deleted fields should be returned. * * @see EntityFieldQuery::deleted() */ const RETURN_ALL = NULL; /** * TRUE if the query has already been altered, FALSE if it hasn't. * * Used in alter hooks to check for cloned queries that have already been * altered prior to the clone (for example, the pager count query). * * @var boolean */ public $altered = FALSE; /** * Associative array of entity-generic metadata conditions. * * @var array * * @see EntityFieldQuery::entityCondition() */ public $entityConditions = array(); /** * List of field conditions. * * @var array * * @see EntityFieldQuery::fieldCondition() */ public $fieldConditions = array(); /** * List of field meta conditions (language and delta). * * Field conditions operate on columns specified by hook_field_schema(), * the meta conditions operate on columns added by the system: delta * and language. These can not be mixed with the field conditions because * field columns can have any name including delta and language. * * @var array * * @see EntityFieldQuery::fieldLanguageCondition() * @see EntityFieldQuery::fieldDeltaCondition() */ public $fieldMetaConditions = array(); /** * List of property conditions. * * @var array * * @see EntityFieldQuery::propertyCondition() */ public $propertyConditions = array(); /** * List of order clauses. * * @var array */ public $order = array(); /** * The query range. * * @var array * * @see EntityFieldQuery::range() */ public $range = array(); /** * The query pager data. * * @var array * * @see EntityFieldQuery::pager() */ public $pager = array(); /** * Query behavior for deleted data. * * TRUE to return only deleted data, FALSE to return only non-deleted data, * EntityFieldQuery::RETURN_ALL to return everything. * * @see EntityFieldQuery::deleted() */ public $deleted = FALSE; /** * A list of field arrays used. * * Field names passed to EntityFieldQuery::fieldCondition() and * EntityFieldQuery::fieldOrderBy() are run through field_info_field() before * stored in this array. This way, the elements of this array are field * arrays. * * @var array */ public $fields = array(); /** * TRUE if this is a count query, FALSE if it isn't. * * @var boolean */ public $count = FALSE; /** * Flag indicating whether this is querying current or all revisions. * * @var int * * @see EntityFieldQuery::age() */ public $age = FIELD_LOAD_CURRENT; /** * A list of the tags added to this query. * * @var array * * @see EntityFieldQuery::addTag() */ public $tags = array(); /** * A list of metadata added to this query. * * @var array * * @see EntityFieldQuery::addMetaData() */ public $metaData = array(); /** * The ordered results. * * @var array * * @see EntityFieldQuery::execute(). */ public $orderedResults = array(); /** * The method executing the query, if it is overriding the default. * * @var string * * @see EntityFieldQuery::execute(). */ public $executeCallback = ''; /** * Adds a condition on entity-generic metadata. * * If the overall query contains only entity conditions or ordering, or if * there are property conditions, then specifying the entity type is * mandatory. If there are field conditions or ordering but no property * conditions or ordering, then specifying an entity type is optional. While * the field storage engine might support field conditions on more than one * entity type, there is no way to query across multiple entity base tables by * default. To specify the entity type, pass in 'entity_type' for $name, * the type as a string for $value, and no $operator (it's disregarded). * * 'bundle', 'revision_id' and 'entity_id' have no such restrictions. * * Note: The "comment" entity type does not support bundle conditions. * * @param $name * 'entity_type', 'bundle', 'revision_id' or 'entity_id'. * @param $value * The value for $name. In most cases, this is a scalar. For more complex * options, it is an array. The meaning of each element in the array is * dependent on $operator. * @param $operator * Possible values: * - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These * operators expect $value to be a literal of the same type as the * column. * - 'IN', 'NOT IN': These operators expect $value to be an array of * literals of the same type as the column. * - 'BETWEEN': This operator expects $value to be an array of two literals * of the same type as the column. * The operator can be omitted, and will default to 'IN' if the value is an * array, or to '=' otherwise. * * @return EntityFieldQuery * The called object. */ public function entityCondition($name, $value, $operator = NULL) { // The '!=' operator is deprecated in favour of the '<>' operator since the // latter is ANSI SQL compatible. if ($operator == '!=') { $operator = '<>'; } $this->entityConditions[$name] = array( 'value' => $value, 'operator' => $operator, ); return $this; } /** * Adds a condition on field values. * * Note that entities with empty field values will be excluded from the * EntityFieldQuery results when using this method. * * @param $field * Either a field name or a field array. * @param $column * The column that should hold the value to be matched. * @param $value * The value to test the column value against. * @param $operator * The operator to be used to test the given value. * @param $delta_group * An arbitrary identifier: conditions in the same group must have the same * $delta_group. * @param $language_group * An arbitrary identifier: conditions in the same group must have the same * $language_group. * * @return EntityFieldQuery * The called object. * * @see EntityFieldQuery::addFieldCondition * @see EntityFieldQuery::deleted */ public function fieldCondition($field, $column = NULL, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) { return $this->addFieldCondition($this->fieldConditions, $field, $column, $value, $operator, $delta_group, $language_group); } /** * Adds a condition on the field language column. * * @param $field * Either a field name or a field array. * @param $value * The value to test the column value against. * @param $operator * The operator to be used to test the given value. * @param $delta_group * An arbitrary identifier: conditions in the same group must have the same * $delta_group. * @param $language_group * An arbitrary identifier: conditions in the same group must have the same * $language_group. * * @return EntityFieldQuery * The called object. * * @see EntityFieldQuery::addFieldCondition * @see EntityFieldQuery::deleted */ public function fieldLanguageCondition($field, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) { return $this->addFieldCondition($this->fieldMetaConditions, $field, 'language', $value, $operator, $delta_group, $language_group); } /** * Adds a condition on the field delta column. * * @param $field * Either a field name or a field array. * @param $value * The value to test the column value against. * @param $operator * The operator to be used to test the given value. * @param $delta_group * An arbitrary identifier: conditions in the same group must have the same * $delta_group. * @param $language_group * An arbitrary identifier: conditions in the same group must have the same * $language_group. * * @return EntityFieldQuery * The called object. * * @see EntityFieldQuery::addFieldCondition * @see EntityFieldQuery::deleted */ public function fieldDeltaCondition($field, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) { return $this->addFieldCondition($this->fieldMetaConditions, $field, 'delta', $value, $operator, $delta_group, $language_group); } /** * Adds the given condition to the proper condition array. * * @param $conditions * A reference to an array of conditions. * @param $field * Either a field name or a field array. * @param $column * A column defined in the hook_field_schema() of this field. If this is * omitted then the query will find only entities that have data in this * field, using the entity and property conditions if there are any. * @param $value * The value to test the column value against. In most cases, this is a * scalar. For more complex options, it is an array. The meaning of each * element in the array is dependent on $operator. * @param $operator * Possible values: * - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These * operators expect $value to be a literal of the same type as the * column. * - 'IN', 'NOT IN': These operators expect $value to be an array of * literals of the same type as the column. * - 'BETWEEN': This operator expects $value to be an array of two literals * of the same type as the column. * The operator can be omitted, and will default to 'IN' if the value is an * array, or to '=' otherwise. * @param $delta_group * An arbitrary identifier: conditions in the same group must have the same * $delta_group. For example, let's presume a multivalue field which has * two columns, 'color' and 'shape', and for entity id 1, there are two * values: red/square and blue/circle. Entity ID 1 does not have values * corresponding to 'red circle', however if you pass 'red' and 'circle' as * conditions, it will appear in the results - by default queries will run * against any combination of deltas. By passing the conditions with the * same $delta_group it will ensure that only values attached to the same * delta are matched, and entity 1 would then be excluded from the results. * @param $language_group * An arbitrary identifier: conditions in the same group must have the same * $language_group. * * @return EntityFieldQuery * The called object. */ protected function addFieldCondition(&$conditions, $field, $column = NULL, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) { // The '!=' operator is deprecated in favour of the '<>' operator since the // latter is ANSI SQL compatible. if ($operator == '!=') { $operator = '<>'; } if (is_scalar($field)) { $field_definition = field_info_field($field); if (empty($field_definition)) { throw new EntityFieldQueryException(t('Unknown field: @field_name', array('@field_name' => $field))); } $field = $field_definition; } // Ensure the same index is used for field conditions as for fields. $index = count($this->fields); $this->fields[$index] = $field; if (isset($column)) { $conditions[$index] = array( 'field' => $field, 'column' => $column, 'value' => $value, 'operator' => $operator, 'delta_group' => $delta_group, 'language_group' => $language_group, ); } return $this; } /** * Adds a condition on an entity-specific property. * * An $entity_type must be specified by calling * EntityFieldCondition::entityCondition('entity_type', $entity_type) before * executing the query. Also, by default only entities stored in SQL are * supported; however, EntityFieldQuery::executeCallback can be set to handle * different entity storage. * * @param $column * A column defined in the hook_schema() of the base table of the entity. * @param $value * The value to test the field against. In most cases, this is a scalar. For * more complex options, it is an array. The meaning of each element in the * array is dependent on $operator. * @param $operator * Possible values: * - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These * operators expect $value to be a literal of the same type as the * column. * - 'IN', 'NOT IN': These operators expect $value to be an array of * literals of the same type as the column. * - 'BETWEEN': This operator expects $value to be an array of two literals * of the same type as the column. * The operator can be omitted, and will default to 'IN' if the value is an * array, or to '=' otherwise. * * @return EntityFieldQuery * The called object. */ public function propertyCondition($column, $value, $operator = NULL) { // The '!=' operator is deprecated in favour of the '<>' operator since the // latter is ANSI SQL compatible. if ($operator == '!=') { $operator = '<>'; } $this->propertyConditions[] = array( 'column' => $column, 'value' => $value, 'operator' => $operator, ); return $this; } /** * Orders the result set by entity-generic metadata. * * If called multiple times, the query will order by each specified column in * the order this method is called. * * Note: The "comment" and "taxonomy_term" entity types don't support ordering * by bundle. For "taxonomy_term", propertyOrderBy('vid') can be used instead. * * @param $name * 'entity_type', 'bundle', 'revision_id' or 'entity_id'. * @param $direction * The direction to sort. Legal values are "ASC" and "DESC". * * @return EntityFieldQuery * The called object. */ public function entityOrderBy($name, $direction = 'ASC') { $this->order[] = array( 'type' => 'entity', 'specifier' => $name, 'direction' => $direction, ); return $this; } /** * Orders the result set by a given field column. * * If called multiple times, the query will order by each specified column in * the order this method is called. Note that entities with empty field * values will be excluded from the EntityFieldQuery results when using this * method. * * @param $field * Either a field name or a field array. * @param $column * A column defined in the hook_field_schema() of this field. entity_id and * bundle can also be used. * @param $direction * The direction to sort. Legal values are "ASC" and "DESC". * * @return EntityFieldQuery * The called object. */ public function fieldOrderBy($field, $column, $direction = 'ASC') { if (is_scalar($field)) { $field_definition = field_info_field($field); if (empty($field_definition)) { throw new EntityFieldQueryException(t('Unknown field: @field_name', array('@field_name' => $field))); } $field = $field_definition; } // Save the index used for the new field, for later use in field storage. $index = count($this->fields); $this->fields[$index] = $field; $this->order[] = array( 'type' => 'field', 'specifier' => array( 'field' => $field, 'index' => $index, 'column' => $column, ), 'direction' => $direction, ); return $this; } /** * Orders the result set by an entity-specific property. * * An $entity_type must be specified by calling * EntityFieldCondition::entityCondition('entity_type', $entity_type) before * executing the query. * * If called multiple times, the query will order by each specified column in * the order this method is called. * * @param $column * The column on which to order. * @param $direction * The direction to sort. Legal values are "ASC" and "DESC". * * @return EntityFieldQuery * The called object. */ public function propertyOrderBy($column, $direction = 'ASC') { $this->order[] = array( 'type' => 'property', 'specifier' => $column, 'direction' => $direction, ); return $this; } /** * Sets the query to be a count query only. * * @return EntityFieldQuery * The called object. */ public function count() { $this->count = TRUE; return $this; } /** * Restricts a query to a given range in the result set. * * @param $start * The first entity from the result set to return. If NULL, removes any * range directives that are set. * @param $length * The number of entities to return from the result set. * * @return EntityFieldQuery * The called object. */ public function range($start = NULL, $length = NULL) { $this->range = array( 'start' => $start, 'length' => $length, ); return $this; } /** * Enables a pager for the query. * * @param $limit * An integer specifying the number of elements per page. If passed a false * value (FALSE, 0, NULL), the pager is disabled. * @param $element * An optional integer to distinguish between multiple pagers on one page. * If not provided, one is automatically calculated. * * @return EntityFieldQuery * The called object. */ public function pager($limit = 10, $element = NULL) { if (!isset($element)) { $element = PagerDefault::$maxElement++; } elseif ($element >= PagerDefault::$maxElement) { PagerDefault::$maxElement = $element + 1; } $this->pager = array( 'limit' => $limit, 'element' => $element, ); return $this; } /** * Enables sortable tables for this query. * * @param $headers * An EFQ Header array based on which the order clause is added to the * query. * * @return EntityFieldQuery * The called object. */ public function tableSort(&$headers) { // If 'field' is not initialized, the header columns aren't clickable foreach ($headers as $key =>$header) { if (is_array($header) && isset($header['specifier'])) { $headers[$key]['field'] = ''; } } $order = tablesort_get_order($headers); $direction = tablesort_get_sort($headers); foreach ($headers as $header) { if (is_array($header) && ($header['data'] == $order['name'])) { if ($header['type'] == 'field') { $this->fieldOrderBy($header['specifier']['field'], $header['specifier']['column'], $direction); } else { $header['direction'] = $direction; $this->order[] = $header; } } } return $this; } /** * Filters on the data being deleted. * * @param $deleted * TRUE to only return deleted data, FALSE to return non-deleted data, * EntityFieldQuery::RETURN_ALL to return everything. Defaults to FALSE. * * @return EntityFieldQuery * The called object. */ public function deleted($deleted = TRUE) { $this->deleted = $deleted; return $this; } /** * Queries the current or every revision. * * Note that this only affects field conditions. Property conditions always * apply to the current revision. * @TODO: Once revision tables have been cleaned up, revisit this. * * @param $age * - FIELD_LOAD_CURRENT (default): Query the most recent revisions for all * entities. The results will be keyed by entity type and entity ID. * - FIELD_LOAD_REVISION: Query all revisions. The results will be keyed by * entity type and entity revision ID. * * @return EntityFieldQuery * The called object. */ public function age($age) { $this->age = $age; return $this; } /** * Adds a tag to the query. * * Tags are strings that mark a query so that hook_query_alter() and * hook_query_TAG_alter() implementations may decide if they wish to alter * the query. A query may have any number of tags, and they must be valid PHP * identifiers (composed of letters, numbers, and underscores). For example, * queries involving nodes that will be displayed for a user need to add the * tag 'node_access', so that the node module can add access restrictions to * the query. * * If an entity field query has tags, it must also have an entity type * specified, because the alter hook will need the entity base table. * * @param string $tag * The tag to add. * * @return EntityFieldQuery * The called object. */ public function addTag($tag) { $this->tags[$tag] = $tag; return $this; } /** * Adds additional metadata to the query. * * Sometimes a query may need to provide additional contextual data for the * alter hook. The alter hook implementations may then use that information * to decide if and how to take action. * * @param $key * The unique identifier for this piece of metadata. Must be a string that * follows the same rules as any other PHP identifier. * @param $object * The additional data to add to the query. May be any valid PHP variable. * * @return EntityFieldQuery * The called object. */ public function addMetaData($key, $object) { $this->metaData[$key] = $object; return $this; } /** * Executes the query. * * After executing the query, $this->orderedResults will contain a list of * the same stub entities in the order returned by the query. This is only * relevant if there are multiple entity types in the returned value and * a field ordering was requested. In every other case, the returned value * contains everything necessary for processing. * * @return * Either a number if count() was called or an array of associative arrays * of stub entities. The outer array keys are entity types, and the inner * array keys are the relevant ID. (In most cases this will be the entity * ID. The only exception is when age=FIELD_LOAD_REVISION is used and field * conditions or sorts are present -- in this case, the key will be the * revision ID.) The entity type will only exist in the outer array if * results were found. The inner array values are always stub entities, as * returned by entity_create_stub_entity(). To traverse the returned array: * @code * foreach ($query->execute() as $entity_type => $entities) { * foreach ($entities as $entity_id => $entity) { * @endcode * Note if the entity type is known, then the following snippet will load * the entities found: * @code * $result = $query->execute(); * if (!empty($result[$my_type])) { * $entities = entity_load($my_type, array_keys($result[$my_type])); * } * @endcode */ public function execute() { // Give a chance to other modules to alter the query. drupal_alter('entity_query', $this); $this->altered = TRUE; // Initialize the pager. $this->initializePager(); // Execute the query using the correct callback. $result = call_user_func($this->queryCallback(), $this); return $result; } /** * Determines the query callback to use for this entity query. * * @return * A callback that can be used with call_user_func(). */ public function queryCallback() { // Use the override from $this->executeCallback. It can be set either // while building the query, or using hook_entity_query_alter(). if (function_exists($this->executeCallback)) { return $this->executeCallback; } // If there are no field conditions and sorts, and no execute callback // then we default to querying entity tables in SQL. if (empty($this->fields)) { return array($this, 'propertyQuery'); } // If no override, find the storage engine to be used. foreach ($this->fields as $field) { if (!isset($storage)) { $storage = $field['storage']['module']; } elseif ($storage != $field['storage']['module']) { throw new EntityFieldQueryException(t("Can't handle more than one field storage engine")); } } if ($storage) { // Use hook_field_storage_query() from the field storage. return $storage . '_field_storage_query'; } else { throw new EntityFieldQueryException(t("Field storage engine not found.")); } } /** * Queries entity tables in SQL for property conditions and sorts. * * This method is only used if there are no field conditions and sorts. * * @return * See EntityFieldQuery::execute(). */ protected function propertyQuery() { if (empty($this->entityConditions['entity_type'])) { throw new EntityFieldQueryException(t('For this query an entity type must be specified.')); } $entity_type = $this->entityConditions['entity_type']['value']; $entity_info = entity_get_info($entity_type); if (empty($entity_info['base table'])) { throw new EntityFieldQueryException(t('Entity %entity has no base table.', array('%entity' => $entity_type))); } $base_table = $entity_info['base table']; $base_table_schema = drupal_get_schema($base_table); $select_query = db_select($base_table); $select_query->addExpression(':entity_type', 'entity_type', array(':entity_type' => $entity_type)); // Process the property conditions. foreach ($this->propertyConditions as $property_condition) { $this->addCondition($select_query, $base_table . '.' . $property_condition['column'], $property_condition); } // Process the four possible entity condition. // The id field is always present in entity keys. $sql_field = $entity_info['entity keys']['id']; $id_map['entity_id'] = $sql_field; $select_query->addField($base_table, $sql_field, 'entity_id'); if (isset($this->entityConditions['entity_id'])) { $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['entity_id']); } // If there is a revision key defined, use it. if (!empty($entity_info['entity keys']['revision'])) { $sql_field = $entity_info['entity keys']['revision']; $select_query->addField($base_table, $sql_field, 'revision_id'); if (isset($this->entityConditions['revision_id'])) { $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['revision_id']); } } else { $sql_field = 'revision_id'; $select_query->addExpression('NULL', 'revision_id'); } $id_map['revision_id'] = $sql_field; // Handle bundles. if (!empty($entity_info['entity keys']['bundle'])) { $sql_field = $entity_info['entity keys']['bundle']; $having = FALSE; if (!empty($base_table_schema['fields'][$sql_field])) { $select_query->addField($base_table, $sql_field, 'bundle'); } } else { $sql_field = 'bundle'; $select_query->addExpression(':bundle', 'bundle', array(':bundle' => $entity_type)); $having = TRUE; } $id_map['bundle'] = $sql_field; if (isset($this->entityConditions['bundle'])) { if (!empty($entity_info['entity keys']['bundle'])) { $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['bundle'], $having); } else { // This entity has no bundle, so invalidate the query. $select_query->where('1 = 0'); } } // Order the query. foreach ($this->order as $order) { if ($order['type'] == 'entity') { $key = $order['specifier']; if (!isset($id_map[$key])) { throw new EntityFieldQueryException(t('Do not know how to order on @key for @entity_type', array('@key' => $key, '@entity_type' => $entity_type))); } $select_query->orderBy($id_map[$key], $order['direction']); } elseif ($order['type'] == 'property') { $select_query->orderBy($base_table . '.' . $order['specifier'], $order['direction']); } } return $this->finishQuery($select_query); } /** * Gets the total number of results and initializes a pager for the query. * * The pager can be disabled by either setting the pager limit to 0, or by * setting this query to be a count query. */ function initializePager() { if ($this->pager && !empty($this->pager['limit']) && !$this->count) { $page = pager_find_page($this->pager['element']); $count_query = clone $this; $this->pager['total'] = $count_query->count()->execute(); $this->pager['start'] = $page * $this->pager['limit']; pager_default_initialize($this->pager['total'], $this->pager['limit'], $this->pager['element']); $this->range($this->pager['start'], $this->pager['limit']); } } /** * Finishes the query. * * Adds tags, metaData, range and returns the requested list or count. * * @param SelectQuery $select_query * A SelectQuery which has entity_type, entity_id, revision_id and bundle * fields added. * @param $id_key * Which field's values to use as the returned array keys. * * @return * See EntityFieldQuery::execute(). */ function finishQuery($select_query, $id_key = 'entity_id') { foreach ($this->tags as $tag) { $select_query->addTag($tag); } foreach ($this->metaData as $key => $object) { $select_query->addMetaData($key, $object); } $select_query->addMetaData('entity_field_query', $this); if ($this->range) { $select_query->range($this->range['start'], $this->range['length']); } if ($this->count) { return $select_query->countQuery()->execute()->fetchField(); } $return = array(); foreach ($select_query->execute() as $partial_entity) { $bundle = isset($partial_entity->bundle) ? $partial_entity->bundle : NULL; $entity = entity_create_stub_entity($partial_entity->entity_type, array($partial_entity->entity_id, $partial_entity->revision_id, $bundle)); $return[$partial_entity->entity_type][$partial_entity->$id_key] = $entity; $this->ordered_results[] = $partial_entity; } return $return; } /** * Adds a condition to an already built SelectQuery (internal function). * * This is a helper for hook_entity_query() and hook_field_storage_query(). * * @param SelectQuery $select_query * A SelectQuery object. * @param $sql_field * The name of the field. * @param $condition * A condition as described in EntityFieldQuery::fieldCondition() and * EntityFieldQuery::entityCondition(). * @param $having * HAVING or WHERE. This is necessary because SQL can't handle WHERE * conditions on aliased columns. */ public function addCondition(SelectQuery $select_query, $sql_field, $condition, $having = FALSE) { $method = $having ? 'havingCondition' : 'condition'; $like_prefix = ''; switch ($condition['operator']) { case 'CONTAINS': $like_prefix = '%'; case 'STARTS_WITH': $select_query->$method($sql_field, $like_prefix . db_like($condition['value']) . '%', 'LIKE'); break; default: $select_query->$method($sql_field, $condition['value'], $condition['operator']); } } } /** * Defines an exception thrown when a malformed entity is passed. */ class EntityMalformedException extends Exception { }
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