function SqlContentEntityStorage::readFieldItemsToPurge

Overrides ContentEntityStorageBase::readFieldItemsToPurge

File

core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php, line 1640

Class

SqlContentEntityStorage

A content entity database storage implementation.

Namespace

Code

protected function readFieldItemsToPurge(FieldDefinitionInterface $field_definition, $batch_size) {
    // Check whether the whole field storage definition is gone, or just some
    // bundle fields.
    $storage_definition = $field_definition->getFieldStorageDefinition();
    $table_mapping = $this->getTableMapping();
    $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $storage_definition->isDeleted());
    // Get the entities which we want to purge first.
    $entity_query = $this->database
        ->select($table_name, 't', [
        'fetch' => \PDO::FETCH_ASSOC,
    ]);
    $or = $entity_query->orConditionGroup();
    foreach ($storage_definition->getColumns() as $column_name => $data) {
        $or->isNotNull($table_mapping->getFieldColumnName($storage_definition, $column_name));
    }
    $entity_query->distinct(TRUE)
        ->fields('t', [
        'entity_id',
    ])
        ->condition('bundle', $field_definition->getTargetBundle())
        ->range(0, $batch_size);
    // Create a map of field data table column names to field column names.
    $column_map = [];
    foreach ($storage_definition->getColumns() as $column_name => $data) {
        $column_map[$table_mapping->getFieldColumnName($storage_definition, $column_name)] = $column_name;
    }
    $entities = [];
    $items_by_entity = [];
    foreach ($entity_query->execute() as $row) {
        $item_query = $this->database
            ->select($table_name, 't', [
            'fetch' => \PDO::FETCH_ASSOC,
        ])
            ->fields('t')
            ->condition('entity_id', $row['entity_id'])
            ->condition('deleted', 1)
            ->orderBy('delta');
        foreach ($item_query->execute() as $item_row) {
            if (!isset($entities[$item_row['revision_id']])) {
                // Create entity with the right revision id and entity id combination.
                $item_row['entity_type'] = $this->entityTypeId;
                // @todo Replace this by an entity object created via an entity
                //   factory. https://www.drupal.org/node/1867228.
                $entities[$item_row['revision_id']] = _field_create_entity_from_ids((object) $item_row);
            }
            $item = [];
            foreach ($column_map as $db_column => $field_column) {
                $item[$field_column] = $item_row[$db_column];
            }
            $items_by_entity[$item_row['revision_id']][] = $item;
        }
    }
    // Create field item objects and return.
    foreach ($items_by_entity as $revision_id => $values) {
        $entity_adapter = $entities[$revision_id]->getTypedData();
        $items_by_entity[$revision_id] = \Drupal::typedDataManager()->create($field_definition, $values, $field_definition->getName(), $entity_adapter);
    }
    return $items_by_entity;
}