SqlContentEntityStorage.php 62.9 KB
Newer Older
1 2 3 4
<?php

/**
 * @file
5
 * Contains \Drupal\Core\Entity\Sql\SqlContentEntityStorage.
6 7
 */

8
namespace Drupal\Core\Entity\Sql;
9

10
use Drupal\Component\Utility\String;
11
use Drupal\Core\Cache\CacheBackendInterface;
12
use Drupal\Core\Database\Connection;
13
use Drupal\Core\Database\Database;
14 15 16 17 18 19
use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Entity\ContentEntityStorageBase;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\Core\Entity\EntityStorageException;
use Drupal\Core\Entity\EntityTypeInterface;
20
use Drupal\Core\Entity\Query\QueryInterface;
21
use Drupal\Core\Entity\Schema\FieldableEntityStorageSchemaInterface;
22
use Drupal\Core\Field\FieldDefinitionInterface;
23
use Drupal\Core\Field\FieldStorageDefinitionInterface;
24
use Drupal\Core\Language\LanguageInterface;
25
use Drupal\field\FieldStorageConfigInterface;
26 27 28
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
29
 * A content entity database storage implementation.
30
 *
31
 * This class can be used as-is by most content entity types. Entity types
32
 * requiring special handling can extend the class.
33
 *
34
 * The class uses \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema
35
 * internally in order to automatically generate the database schema based on
36 37
 * the defined base fields. Entity types can override the schema handler to
 * customize the generated schema; e.g., to add additional indexes.
38 39
 *
 * @ingroup entity_api
40
 */
41
class SqlContentEntityStorage extends ContentEntityStorageBase implements SqlEntityStorageInterface, FieldableEntityStorageSchemaInterface {
42 43 44 45 46 47 48

  /**
   * The mapping of field columns to SQL tables.
   *
   * @var \Drupal\Core\Entity\Sql\TableMappingInterface
   */
  protected $tableMapping;
49 50 51 52 53 54 55 56 57 58

  /**
   * 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 = FALSE;

59 60 61 62 63 64 65 66 67 68 69 70 71 72
  /**
   * The entity langcode key.
   *
   * @var string|bool
   */
  protected $langcodeKey = FALSE;

  /**
   * The base table of the entity.
   *
   * @var string
   */
  protected $baseTable;

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
  /**
   * The table that stores revisions, if the entity supports revisions.
   *
   * @var string
   */
  protected $revisionTable;

  /**
   * The table that stores properties, if the entity has multilingual support.
   *
   * @var string
   */
  protected $dataTable;

  /**
   * The table that stores revision field data if the entity supports revisions.
   *
   * @var string
   */
  protected $revisionDataTable;

  /**
   * Active database connection.
   *
   * @var \Drupal\Core\Database\Connection
   */
  protected $database;

  /**
102
   * The entity manager.
103
   *
104
   * @var \Drupal\Core\Entity\EntityManagerInterface
105
   */
106
  protected $entityManager;
107

108
  /**
109
   * The entity type's storage schema object.
110
   *
111
   * @var \Drupal\Core\Entity\Schema\EntityStorageSchemaInterface
112
   */
113
  protected $storageSchema;
114

115 116 117 118 119 120 121
  /**
   * Cache backend.
   *
   * @var \Drupal\Core\Cache\CacheBackendInterface
   */
  protected $cacheBackend;

122 123 124
  /**
   * {@inheritdoc}
   */
125
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
126
    return new static(
127
      $entity_type,
128
      $container->get('database'),
129 130
      $container->get('entity.manager'),
      $container->get('cache.entity')
131 132 133
    );
  }

134 135 136 137 138 139 140 141 142 143 144
  /**
   * Gets the base field definitions for a content entity type.
   *
   * @return \Drupal\Core\Field\FieldDefinitionInterface[]
   *   The array of base field definitions for the entity type, keyed by field
   *   name.
   */
  public function getFieldStorageDefinitions() {
    return $this->entityManager->getBaseFieldDefinitions($this->entityTypeId);
  }

145
  /**
146
   * Constructs a SqlContentEntityStorage object.
147
   *
148 149
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
150 151
   * @param \Drupal\Core\Database\Connection $database
   *   The database connection to be used.
152 153
   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
   *   The entity manager.
154 155
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   The cache backend to be used.
156
   */
157
  public function __construct(EntityTypeInterface $entity_type, Connection $database, EntityManagerInterface $entity_manager, CacheBackendInterface $cache) {
158
    parent::__construct($entity_type);
159
    $this->database = $database;
160
    $this->entityManager = $entity_manager;
161
    $this->cacheBackend = $cache;
162 163 164 165 166 167 168 169 170 171 172 173 174 175
    $this->initTableLayout();
  }

  /**
   * Initializes table name variables.
   */
  protected function initTableLayout() {
    // Reset table field values to ensure changes in the entity type definition
    // are correctly reflected in the table layout.
    $this->tableMapping = NULL;
    $this->revisionKey = NULL;
    $this->revisionTable = NULL;
    $this->dataTable = NULL;
    $this->revisionDataTable = NULL;
176 177 178 179 180 181 182 183 184

    // @todo Remove table names from the entity type definition in
    //   https://drupal.org/node/2232465
    $this->baseTable = $this->entityType->getBaseTable() ?: $this->entityTypeId;
    $revisionable = $this->entityType->isRevisionable();
    if ($revisionable) {
      $this->revisionKey = $this->entityType->getKey('revision') ?: 'revision_id';
      $this->revisionTable = $this->entityType->getRevisionTable() ?: $this->entityTypeId . '_revision';
    }
185
    $translatable = $this->entityType->isTranslatable();
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234
    if ($translatable) {
      $this->dataTable = $this->entityType->getDataTable() ?: $this->entityTypeId . '_field_data';
      $this->langcodeKey = $this->entityType->getKey('langcode') ?: 'langcode';
      $this->defaultLangcodeKey = $this->entityType->getKey('default_langcode') ?: 'default_langcode';
    }
    if ($revisionable && $translatable) {
      $this->revisionDataTable = $this->entityType->getRevisionDataTable() ?: $this->entityTypeId . '_field_revision';
    }
  }

  /**
   * Returns the base table name.
   *
   * @return string
   *   The table name.
   */
  public function getBaseTable() {
    return $this->baseTable;
  }

  /**
   * Returns the revision table name.
   *
   * @return string|false
   *   The table name or FALSE if it is not available.
   */
  public function getRevisionTable() {
    return $this->revisionTable;
  }

  /**
   * Returns the data table name.
   *
   * @return string|false
   *   The table name or FALSE if it is not available.
   */
  public function getDataTable() {
    return $this->dataTable;
  }

  /**
   * Returns the revision data table name.
   *
   * @return string|false
   *   The table name or FALSE if it is not available.
   */
  public function getRevisionDataTable() {
    return $this->revisionDataTable;
  }
235

236
  /**
237
   * Returns the entity type's storage schema object.
238
   *
239
   * @return \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema
240
   *   The schema object.
241
   */
242 243 244 245
  protected function getStorageSchema() {
    if (!isset($this->storageSchema)) {
      $class = $this->entityType->getHandlerClass('storage_schema') ?: 'Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema';
      $this->storageSchema = new $class($this->entityManager, $this->entityType, $this, $this->database);
246
    }
247
    return $this->storageSchema;
248
  }
249

250
  /**
251 252 253 254 255 256 257
   * Updates the wrapped entity type definition.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The update entity type.
   *
   * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
   *   See https://www.drupal.org/node/2274017.
258
   */
259 260 261 262 263 264 265 266 267
  public function setEntityType(EntityTypeInterface $entity_type) {
    if ($this->entityType->id() == $entity_type->id()) {
      $this->entityType = $entity_type;
      $this->initTableLayout();
    }
    else {
      throw new EntityStorageException(String::format('Unsupported entity type @id', array('@id' => $entity_type->id())));
    }
  }
268

269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
  /**
   * {@inheritdoc}
   */
  public function getTableMapping(array $storage_definitions = NULL) {
    $table_mapping = $this->tableMapping;

    // If we are using our internal storage definitions, which is our main use
    // case, we can statically cache the computed table mapping. If a new set
    // of field storage definitions is passed, for instance when comparing old
    // and new storage schema, we compute the table mapping without caching.
    // @todo Clean-up this in https://www.drupal.org/node/2274017 so we can
    //   easily instantiate a new table mapping whenever needed.
    if (!isset($this->tableMapping) || $storage_definitions) {
      $definitions = $storage_definitions ?: $this->entityManager->getFieldStorageDefinitions($this->entityTypeId);
      $table_mapping = new DefaultTableMapping($definitions);

      $definitions = array_filter($definitions, function (FieldStorageDefinitionInterface $definition) use ($table_mapping) {
        return $table_mapping->allowsSharedTableStorage($definition);
287 288 289 290 291 292 293 294 295 296 297 298 299 300
      });

      $key_fields = array_values(array_filter(array($this->idKey, $this->revisionKey, $this->bundleKey, $this->uuidKey, $this->langcodeKey)));
      $all_fields = array_keys($definitions);
      $revisionable_fields = array_keys(array_filter($definitions, function (FieldStorageDefinitionInterface $definition) {
        return $definition->isRevisionable();
      }));
      // Make sure the key fields come first in the list of fields.
      $all_fields = array_merge($key_fields, array_diff($all_fields, $key_fields));

      // Nodes have all three of these fields, while custom blocks only have
      // log.
      // @todo Provide automatic definitions for revision metadata fields in
      //   https://drupal.org/node/2248983.
301 302 303 304 305
      $revision_metadata_fields = array_intersect(array(
        'revision_timestamp',
        'revision_uid',
        'revision_log',
      ), $all_fields);
306 307

      $revisionable = $this->entityType->isRevisionable();
308
      $translatable = $this->entityType->isTranslatable();
309 310
      if (!$revisionable && !$translatable) {
        // The base layout stores all the base field values in the base table.
311
        $table_mapping->setFieldNames($this->baseTable, $all_fields);
312 313 314 315 316 317
      }
      elseif ($revisionable && !$translatable) {
        // The revisionable layout stores all the base field values in the base
        // table, except for revision metadata fields. Revisionable fields
        // denormalized in the base table but also stored in the revision table
        // together with the entity ID and the revision ID as identifiers.
318
        $table_mapping->setFieldNames($this->baseTable, array_diff($all_fields, $revision_metadata_fields));
319
        $revision_key_fields = array($this->idKey, $this->revisionKey);
320
        $table_mapping->setFieldNames($this->revisionTable, array_merge($revision_key_fields, $revisionable_fields));
321 322 323 324 325 326 327 328
      }
      elseif (!$revisionable && $translatable) {
        // Multilingual layouts store key field values in the base table. The
        // other base field values are stored in the data table, no matter
        // whether they are translatable or not. The data table holds also a
        // denormalized copy of the bundle field value to allow for more
        // performant queries. This means that only the UUID is not stored on
        // the data table.
329
        $table_mapping
330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
          ->setFieldNames($this->baseTable, $key_fields)
          ->setFieldNames($this->dataTable, array_values(array_diff($all_fields, array($this->uuidKey))))
          // Add the denormalized 'default_langcode' field to the mapping. Its
          // value is identical to the query expression
          // "base_table.langcode = data_table.langcode"
          ->setExtraColumns($this->dataTable, array('default_langcode'));
      }
      elseif ($revisionable && $translatable) {
        // The revisionable multilingual layout stores key field values in the
        // base table, except for language, which is stored in the revision
        // table along with revision metadata. The revision data table holds
        // data field values for all the revisionable fields and the data table
        // holds the data field values for all non-revisionable fields. The data
        // field values of revisionable fields are denormalized in the data
        // table, as well.
345
        $table_mapping->setFieldNames($this->baseTable, array_values(array_diff($key_fields, array($this->langcodeKey))));
346 347 348 349 350

        // Like in the multilingual, non-revisionable case the UUID is not
        // in the data table. Additionally, do not store revision metadata
        // fields in the data table.
        $data_fields = array_values(array_diff($all_fields, array($this->uuidKey), $revision_metadata_fields));
351
        $table_mapping
352 353 354 355 356 357 358 359
          ->setFieldNames($this->dataTable, $data_fields)
          // Add the denormalized 'default_langcode' field to the mapping. Its
          // value is identical to the query expression
          // "base_langcode = data_table.langcode" where "base_langcode" is
          // the language code of the default revision.
          ->setExtraColumns($this->dataTable, array('default_langcode'));

        $revision_base_fields = array_merge(array($this->idKey, $this->revisionKey, $this->langcodeKey), $revision_metadata_fields);
360
        $table_mapping->setFieldNames($this->revisionTable, $revision_base_fields);
361 362

        $revision_data_key_fields = array($this->idKey, $this->revisionKey, $this->langcodeKey);
363 364
        $revision_data_fields = array_diff($revisionable_fields, $revision_metadata_fields, array($this->langcodeKey));
        $table_mapping
365 366 367 368 369
          ->setFieldNames($this->revisionDataTable, array_merge($revision_data_key_fields, $revision_data_fields))
          // Add the denormalized 'default_langcode' field to the mapping. Its
          // value is identical to the query expression
          // "revision_table.langcode = data_table.langcode".
          ->setExtraColumns($this->revisionDataTable, array('default_langcode'));
370
      }
371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395

      // Add dedicated tables.
      $definitions = array_filter($definitions, function (FieldStorageDefinitionInterface $definition) use ($table_mapping) {
        return $table_mapping->requiresDedicatedTableStorage($definition);
      });
      $extra_columns = array(
        'bundle',
        'deleted',
        'entity_id',
        'revision_id',
        'langcode',
        'delta',
      );
      foreach ($definitions as $field_name => $definition) {
        foreach (array($table_mapping->getDedicatedDataTableName($definition), $table_mapping->getDedicatedRevisionTableName($definition)) as $table_name) {
          $table_mapping->setFieldNames($table_name, array($field_name));
          $table_mapping->setExtraColumns($table_name, $extra_columns);
        }
      }

      // Cache the computed table mapping only if we are using our internal
      // storage definitions.
      if (!$storage_definitions) {
        $this->tableMapping = $table_mapping;
      }
396
    }
397

398
    return $table_mapping;
399 400 401 402 403
  }

  /**
   * {@inheritdoc}
   */
404
  protected function doLoadMultiple(array $ids = NULL) {
405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
    // Attempt to load entities from the persistent cache. This will remove IDs
    // that were loaded from $ids.
    $entities_from_cache = $this->getFromPersistentCache($ids);

    // Load any remaining entities from the database.
    $entities_from_storage = $this->getFromStorage($ids);
    $this->setPersistentCache($entities_from_storage);

    return $entities_from_cache + $entities_from_storage;
  }

  /**
   * Gets entities from the storage.
   *
   * @param array|null $ids
   *   If not empty, return entities that match these IDs. Return all entities
   *   when NULL.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface[]
   *   Array of entities from the storage.
   */
  protected function getFromStorage(array $ids = NULL) {
    $entities = array();

    if ($ids === NULL || $ids) {
      // Build and execute the query.
      $query_result = $this->buildQuery($ids)->execute();
      $records = $query_result->fetchAllAssoc($this->idKey);

      // Map the loaded records into entity objects and according fields.
      if ($records) {
        $entities = $this->mapFromStorageRecords($records);

        // Call hook_entity_storage_load().
        foreach ($this->moduleHandler()->getImplementations('entity_storage_load') as $module) {
          $function = $module . '_entity_storage_load';
          $function($entities, $this->entityTypeId);
        }
        // Call hook_TYPE_storage_load().
        foreach ($this->moduleHandler()->getImplementations($this->entityTypeId . '_storage_load') as $module) {
          $function = $module . '_' . $this->entityTypeId . '_storage_load';
          $function($entities);
        }
      }
    }

    return $entities;
  }

  /**
   * Gets entities from the persistent cache backend.
   *
   * @param array|null &$ids
   *   If not empty, return entities that match these IDs. IDs that were found
   *   will be removed from the list.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface[]
   *   Array of entities from the persistent cache.
   */
  protected function getFromPersistentCache(array &$ids = NULL) {
    if (!$this->entityType->isPersistentlyCacheable() || empty($ids)) {
      return array();
    }
    $entities = array();
    // Build the list of cache entries to retrieve.
    $cid_map = array();
    foreach ($ids as $id) {
      $cid_map[$id] = $this->buildCacheId($id);
    }
    $cids = array_values($cid_map);
    if ($cache = $this->cacheBackend->getMultiple($cids)) {
      // Get the entities that were found in the cache.
      foreach ($ids as $index => $id) {
        $cid = $cid_map[$id];
        if (isset($cache[$cid])) {
          $entities[$id] = $cache[$cid]->data;
          unset($ids[$index]);
        }
      }
    }
    return $entities;
  }

  /**
   * Stores entities in the persistent cache backend.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface[] $entities
   *   Entities to store in the cache.
   */
  protected function setPersistentCache($entities) {
    if (!$this->entityType->isPersistentlyCacheable()) {
      return;
    }

    $cache_tags = array(
      $this->entityTypeId . '_values' => TRUE,
      'entity_field_info' => TRUE,
    );
    foreach ($entities as $id => $entity) {
      $this->cacheBackend->set($this->buildCacheId($id), $entity, CacheBackendInterface::CACHE_PERMANENT, $cache_tags);
    }
  }

  /**
   * Invokes hook_entity_load_uncached().
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface[] $entities
   *   List of entities, keyed on the entity ID.
   */
  protected function invokeLoadUncachedHook(array &$entities) {
    if (!empty($entities)) {
      // Call hook_entity_load_uncached().
      foreach ($this->moduleHandler()->getImplementations('entity_load_uncached') as $module) {
        $function = $module . '_entity_load_uncached';
        $function($entities, $this->entityTypeId);
      }
      // Call hook_TYPE_load_uncached().
      foreach ($this->moduleHandler()->getImplementations($this->entityTypeId . '_load_uncached') as $module) {
        $function = $module . '_' . $this->entityTypeId . '_load_uncached';
        $function($entities);
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  public function resetCache(array $ids = NULL) {
    if ($ids) {
      $cids = array();
      foreach ($ids as $id) {
        unset($this->entities[$id]);
        $cids[] = $this->buildCacheId($id);
      }
      if ($this->entityType->isPersistentlyCacheable()) {
        $this->cacheBackend->deleteMultiple($cids);
      }
    }
    else {
      $this->entities = array();
      if ($this->entityType->isPersistentlyCacheable()) {
        $this->cacheBackend->deleteTags(array($this->entityTypeId . '_values' => TRUE));
      }
    }
  }
550

551 552 553 554 555 556 557 558 559 560 561
  /**
   * Returns the cache ID for the passed in entity ID.
   *
   * @param int $id
   *   Entity ID for which the cache ID should be built.
   *
   * @return string
   *   Cache ID that can be passed to the cache backend.
   */
  protected function buildCacheId($id) {
    return "values:{$this->entityTypeId}:$id";
562 563 564
  }

  /**
565
   * Maps from storage records to entity objects, and attaches fields.
566
   *
567 568 569 570 571 572
   * @param array $records
   *   Associative array of query results, keyed on the entity ID.
   *
   * @return array
   *   An array of entity objects implementing the EntityInterface.
   */
573
  protected function mapFromStorageRecords(array $records) {
574 575 576 577
    if (!$records) {
      return array();
    }

578 579 580
    $entities = array();
    foreach ($records as $id => $record) {
      $entities[$id] = array();
581 582 583
      // Skip the item delta and item value levels (if possible) but let the
      // field assign the value as suiting. This avoids unnecessary array
      // hierarchies and saves memory here.
584
      foreach ($record as $name => $value) {
585 586 587 588
        // Handle columns named [field_name]__[column_name] (e.g for field types
        // that store several properties).
        if ($field_name = strstr($name, '__', TRUE)) {
          $property_name = substr($name, strpos($name, '__') + 2);
589
          $entities[$id][$field_name][LanguageInterface::LANGCODE_DEFAULT][$property_name] = $value;
590 591 592 593
        }
        else {
          // Handle columns named directly after the field (e.g if the field
          // type only stores one property).
594
          $entities[$id][$name][LanguageInterface::LANGCODE_DEFAULT] = $value;
595
        }
596
      }
597
      // If we have no multilingual values we can instantiate entity objects
598 599 600 601
      // right now, otherwise we need to collect all the field values first.
      if (!$this->dataTable) {
        $bundle = $this->bundleKey ? $record->{$this->bundleKey} : FALSE;
        // Turn the record into an entity class.
602
        $entities[$id] = new $this->entityClass($entities[$id], $this->entityTypeId, $bundle);
603 604
      }
    }
605
    $this->attachPropertyData($entities);
606 607 608 609 610 611

    // Attach field values.
    if ($this->entityType->isFieldable()) {
      $this->loadFieldItems($entities);
    }

612 613 614 615 616 617 618 619 620
    return $entities;
  }

  /**
   * Attaches property data in all languages for translatable properties.
   *
   * @param array &$entities
   *   Associative array of entities, keyed on the entity ID.
   */
621
  protected function attachPropertyData(array &$entities) {
622 623 624 625 626 627 628 629 630 631
    if ($this->dataTable) {
      // If a revision table is available, we need all the properties of the
      // latest revision. Otherwise we fall back to the data table.
      $table = $this->revisionDataTable ?: $this->dataTable;
      $query = $this->database->select($table, 'data', array('fetch' => \PDO::FETCH_ASSOC))
        ->fields('data')
        ->condition($this->idKey, array_keys($entities))
        ->orderBy('data.' . $this->idKey);

      if ($this->revisionDataTable) {
632 633 634
        // Get the revision IDs.
        $revision_ids = array();
        foreach ($entities as $values) {
635
          $revision_ids[] = is_object($values) ? $values->getRevisionId() : $values[$this->revisionKey][LanguageInterface::LANGCODE_DEFAULT];
636
        }
637
        $query->condition($this->revisionKey, $revision_ids);
638 639 640
      }

      $data = $query->execute();
641 642

      $table_mapping = $this->getTableMapping();
643 644
      $translations = array();
      if ($this->revisionDataTable) {
645
        $data_fields = array_diff($table_mapping->getFieldNames($this->revisionDataTable), $table_mapping->getFieldNames($this->baseTable));
646 647
      }
      else {
648
        $data_fields = $table_mapping->getFieldNames($this->dataTable);
649 650 651 652 653 654
      }

      foreach ($data as $values) {
        $id = $values[$this->idKey];

        // Field values in default language are stored with
655 656
        // LanguageInterface::LANGCODE_DEFAULT as key.
        $langcode = empty($values['default_langcode']) ? $values['langcode'] : LanguageInterface::LANGCODE_DEFAULT;
657 658
        $translations[$id][$langcode] = TRUE;

659 660 661 662 663 664

        foreach ($data_fields as $field_name) {
          $columns = $table_mapping->getColumnNames($field_name);
          // Do not key single-column fields by property name.
          if (count($columns) == 1) {
            $entities[$id][$field_name][$langcode] = $values[reset($columns)];
665 666
          }
          else {
667 668
            foreach ($columns as $property_name => $column_name) {
              $entities[$id][$field_name][$langcode][$property_name] = $values[$column_name];
669
            }
670 671 672 673 674
          }
        }
      }

      foreach ($entities as $id => $values) {
675
        $bundle = $this->bundleKey ? $values[$this->bundleKey][LanguageInterface::LANGCODE_DEFAULT] : FALSE;
676
        // Turn the record into an entity class.
677
        $entities[$id] = new $this->entityClass($values, $this->entityTypeId, $bundle, array_keys($translations[$id]));
678 679 680 681 682
      }
    }
  }

  /**
683
   * Implements \Drupal\Core\Entity\EntityStorageInterface::loadRevision().
684 685 686 687
   */
  public function loadRevision($revision_id) {
    // Build and execute the query.
    $query_result = $this->buildQuery(array(), $revision_id)->execute();
688
    $records = $query_result->fetchAllAssoc($this->idKey);
689

690 691 692 693 694
    if (!empty($records)) {
      // Convert the raw records to entity objects.
      $entities = $this->mapFromStorageRecords($records);
      $this->postLoad($entities);
      return reset($entities);
695 696 697 698
    }
  }

  /**
699
   * Implements \Drupal\Core\Entity\EntityStorageInterface::deleteRevision().
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
   */
  public function deleteRevision($revision_id) {
    if ($revision = $this->loadRevision($revision_id)) {
      // Prevent deletion if this is the default revision.
      if ($revision->isDefaultRevision()) {
        throw new EntityStorageException('Default revision can not be deleted');
      }

      $this->database->delete($this->revisionTable)
        ->condition($this->revisionKey, $revision->getRevisionId())
        ->execute();
      $this->invokeFieldMethod('deleteRevision', $revision);
      $this->deleteFieldItemsRevision($revision);
      $this->invokeHook('revision_delete', $revision);
    }
  }

  /**
718
   * {@inheritdoc}
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735
   */
  protected function buildPropertyQuery(QueryInterface $entity_query, array $values) {
    if ($this->dataTable) {
      // @todo We should not be using a condition to specify whether conditions
      //   apply to the default language. See http://drupal.org/node/1866330.
      // Default to the original entity language if not explicitly specified
      // otherwise.
      if (!array_key_exists('default_langcode', $values)) {
        $values['default_langcode'] = 1;
      }
      // If the 'default_langcode' flag is explicitly not set, we do not care
      // whether the queried values are in the original entity language or not.
      elseif ($values['default_langcode'] === NULL) {
        unset($values['default_langcode']);
      }
    }

736
    parent::buildPropertyQuery($entity_query, $values);
737 738 739 740 741 742 743 744 745 746 747
  }

  /**
   * 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.
748
   * See Drupal\comment\CommentStorage::buildQuery() for an example.
749 750 751 752 753 754 755
   *
   * @param array|null $ids
   *   An array of entity IDs, or NULL to load all entities.
   * @param $revision_id
   *   The ID of the revision to load, or FALSE if this query is asking for the
   *   most current revision(s).
   *
756
   * @return \Drupal\Core\Database\Query\Select
757 758 759
   *   A SelectQuery object for loading the entity.
   */
  protected function buildQuery($ids, $revision_id = FALSE) {
760
    $query = $this->database->select($this->entityType->getBaseTable(), 'base');
761

762
    $query->addTag($this->entityTypeId . '_load_multiple');
763 764 765 766 767 768 769 770 771

    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->revisionTable) {
      $query->join($this->revisionTable, 'revision', "revision.{$this->revisionKey} = base.{$this->revisionKey}");
    }

    // Add fields from the {entity} table.
772 773
    $table_mapping = $this->getTableMapping();
    $entity_fields = $table_mapping->getAllColumns($this->baseTable);
774 775 776

    if ($this->revisionTable) {
      // Add all fields from the {entity_revision} table.
777
      $entity_revision_fields = $table_mapping->getAllColumns($this->revisionTable);
778
      $entity_revision_fields = array_combine($entity_revision_fields, $entity_revision_fields);
779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
      // The ID field is provided by entity, so remove it.
      unset($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 $name) {
        if (isset($entity_field_keys[$name])) {
          unset($entity_fields[$entity_field_keys[$name]]);
        }
      }
      $query->fields('revision', $entity_revision_fields);

      // Compare revision ID of the base and revision table, if equal then this
      // is the default revision.
      $query->addExpression('base.' . $this->revisionKey . ' = revision.' . $this->revisionKey, 'isDefaultRevision');
    }

    $query->fields('base', $entity_fields);

    if ($ids) {
      $query->condition("base.{$this->idKey}", $ids, 'IN');
    }

    return $query;
  }

  /**
807
   * Implements \Drupal\Core\Entity\EntityStorageInterface::delete().
808 809 810 811 812 813 814 815 816
   */
  public function delete(array $entities) {
    if (!$entities) {
      // If no IDs or invalid IDs were passed, do nothing.
      return;
    }

    $transaction = $this->database->startTransaction();
    try {
817
      parent::delete($entities);
818

819 820
      // Ignore replica server temporarily.
      db_ignore_replica();
821 822 823
    }
    catch (\Exception $e) {
      $transaction->rollback();
824
      watchdog_exception($this->entityTypeId, $e);
825 826 827 828 829 830 831
      throw new EntityStorageException($e->getMessage(), $e->getCode(), $e);
    }
  }

  /**
   * {@inheritdoc}
   */
832 833
  protected function doDelete($entities) {
    $ids = array_keys($entities);
834

835 836 837
    $this->database->delete($this->entityType->getBaseTable())
      ->condition($this->idKey, $ids)
      ->execute();
838

839 840 841 842 843
    if ($this->revisionTable) {
      $this->database->delete($this->revisionTable)
        ->condition($this->idKey, $ids)
        ->execute();
    }
844

845 846 847 848 849
    if ($this->dataTable) {
      $this->database->delete($this->dataTable)
        ->condition($this->idKey, $ids)
        ->execute();
    }
850

851 852 853 854 855
    if ($this->revisionDataTable) {
      $this->database->delete($this->revisionDataTable)
        ->condition($this->idKey, $ids)
        ->execute();
    }
856

857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
    foreach ($entities as $entity) {
      $this->invokeFieldMethod('delete', $entity);
      $this->deleteFieldItems($entity);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function save(EntityInterface $entity) {
    $transaction = $this->database->startTransaction();
    try {
      // Sync the changes made in the fields array to the internal values array.
      $entity->updateOriginalValues();

      $return = parent::save($entity);
873

874 875
      // Ignore replica server temporarily.
      db_ignore_replica();
876 877 878 879
      return $return;
    }
    catch (\Exception $e) {
      $transaction->rollback();
880
      watchdog_exception($this->entityTypeId, $e);
881 882 883 884
      throw new EntityStorageException($e->getMessage(), $e->getCode(), $e);
    }
  }

885 886 887 888 889 890 891 892 893 894
  /**
   * {@inheritdoc}
   */
  protected function doSave($id, EntityInterface $entity) {
    // Create the storage record to be saved.
    $record = $this->mapToStorageRecord($entity);

    $is_new = $entity->isNew();
    if (!$is_new) {
      if ($entity->isDefaultRevision()) {
895 896 897 898 899 900
        $this->database
          ->update($this->baseTable)
          ->fields((array) $record)
          ->condition($this->idKey, $record->{$this->idKey})
          ->execute();
        $return = SAVED_UPDATED;
901 902 903 904 905 906 907
      }
      else {
        // @todo, should a different value be returned when saving an entity
        // with $isDefaultRevision = FALSE?
        $return = FALSE;
      }
      if ($this->revisionTable) {
908
        $entity->{$this->revisionKey}->value = $this->saveRevision($entity);
909 910 911 912 913
      }
      if ($this->dataTable) {
        $this->savePropertyData($entity);
      }
      if ($this->revisionDataTable) {
914
        $this->savePropertyData($entity, $this->revisionDataTable);
915 916 917 918 919 920 921 922 923
      }
      if ($this->revisionTable) {
        $entity->setNewRevision(FALSE);
      }
    }
    else {
      // Ensure the entity is still seen as new after assigning it an id,
      // while storing its data.
      $entity->enforceIsNew();
924 925 926 927 928
      $insert_id = $this->database
        ->insert($this->baseTable, array('return' => Database::RETURN_INSERT_ID))
        ->fields((array) $record)
        ->execute();
      // Even if this is a new entity the ID key might have been set, in which
929 930 931
      // case we should not override the provided ID. An ID key that is not set
      // to any value is interpreted as NULL (or DEFAULT) and thus overridden.
      if (!isset($record->{$this->idKey})) {
932 933 934
        $record->{$this->idKey} = $insert_id;
      }
      $return = SAVED_NEW;
935 936 937 938 939 940 941 942 943
      $entity->{$this->idKey}->value = (string) $record->{$this->idKey};
      if ($this->revisionTable) {
        $entity->setNewRevision();
        $record->{$this->revisionKey} = $this->saveRevision($entity);
      }
      if ($this->dataTable) {
        $this->savePropertyData($entity);
      }
      if ($this->revisionDataTable) {
944
        $this->savePropertyData($entity, $this->revisionDataTable);
945
      }
946

947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
      $entity->enforceIsNew(FALSE);
      if ($this->revisionTable) {
        $entity->setNewRevision(FALSE);
      }
    }
    $this->invokeFieldMethod($is_new ? 'insert' : 'update', $entity);
    $this->saveFieldItems($entity, !$is_new);

    if (!$is_new && $this->dataTable) {
      $this->invokeTranslationHooks($entity);
    }
    return $return;
  }

  /**
   * {@inheritdoc}
   */
  protected function has($id, EntityInterface $entity) {
    return !$entity->isNew();
  }

968 969 970 971 972
  /**
   * Stores the entity property language-aware data.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity object.
973 974
   * @param string $table_name
   *   (optional) The table name to save to. Defaults to the data table.
975
   */
976 977 978 979 980
  protected function savePropertyData(EntityInterface $entity, $table_name = NULL) {
    if (!isset($table_name)) {
      $table_name = $this->dataTable;
    }
    $revision = $table_name != $this->dataTable;
981 982 983 984 985 986 987 988 989 990 991 992 993 994

    if (!$revision || !$entity->isNewRevision()) {
      $key = $revision ? $this->revisionKey : $this->idKey;
      $value = $revision ? $entity->getRevisionId() : $entity->id();
      // Delete and insert to handle removed values.
      $this->database->delete($table_name)
        ->condition($key, $value)
        ->execute();
    }

    $query = $this->database->insert($table_name);

    foreach ($entity->getTranslationLanguages() as $langcode => $language) {
      $translation = $entity->getTranslation($langcode);
995
      $record = $this->mapToDataStorageRecord($translation, $table_name);
996 997 998 999 1000 1001 1002 1003 1004
      $values = (array) $record;
      $query
        ->fields(array_keys($values))
        ->values($values);
    }

    $query->execute();
  }

1005 1006 1007 1008 1009 1010 1011 1012 1013 1014
  /**
   * {@inheritdoc}
   */
  protected function invokeHook($hook, EntityInterface $entity) {
    if ($hook == 'presave') {
      $this->invokeFieldMethod('preSave', $entity);
    }
    parent::invokeHook($hook, $entity);
  }

1015 1016 1017
  /**
   * Maps from an entity object to the storage record.
   *
1018
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
1019
   *   The entity object.
1020 1021
   * @param string $table_name
   *   (optional) The table name to map records to. Defaults to the base table.
1022 1023 1024 1025
   *
   * @return \stdClass
   *   The record to store.
   */
1026 1027 1028 1029 1030
  protected function mapToStorageRecord(ContentEntityInterface $entity, $table_name = NULL) {
    if (!isset($table_name)) {
      $table_name = $this->baseTable;
    }

1031
    $record = new \stdClass();
1032 1033
    $table_mapping = $this->getTableMapping();
    foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
1034

1035
      if (empty($this->getFieldStorageDefinitions()[$field_name])) {
1036
        throw new EntityStorageException(String::format('Table mapping contains invalid field %field.', array('%field' => $field_name)));
1037
      }
1038
      $definition = $this->getFieldStorageDefinitions()[$field_name];
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048
      $columns = $table_mapping->getColumnNames($field_name);

      foreach ($columns as $column_name => $schema_name) {
        // If there is no main property and only a single column, get all
        // properties from the first field item and assume that they will be
        // stored serialized.
        // @todo Give field types more control over this behavior in
        //   https://drupal.org/node/2232427.
        if (!$definition->getMainPropertyName() && count($columns) == 1) {
          $value = $entity->$field_name->first()->getValue();
1049
        }
1050 1051
        else {
          $value = isset($entity->$field_name->$column_name) ? $entity->$field_name->$column_name : NULL;
1052
        }
1053 1054
        if (!empty($definition->getSchema()['columns'][$column_name]['serialize'])) {
          $value = serialize($value);
1055
        }
1056 1057 1058 1059 1060

        // Do not set serial fields if we do not have a value. This supports all
        // SQL database drivers.
        // @see https://www.drupal.org/node/2279395
        $value = drupal_schema_get_field_value($definition->getSchema()['columns'][$column_name], $value);
1061
        if (!(empty($value) && $this->isColumnSerial($table_name, $schema_name))) {
1062 1063
          $record->$schema_name = $value;
        }
1064 1065 1066 1067 1068 1069
      }
    }

    return $record;
  }

1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
  /**
   * Checks whether a field column should be treated as serial.
   *
   * @param $table_name
   *   The name of the table the field column belongs to.
   * @param $schema_name
   *   The schema name of the field column.
   *
   * @return bool
   *   TRUE if the the column is serial, FALSE otherwise.
   *
1081 1082
   * @see \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema::processBaseTable()
   * @see \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema::processRevisionTable()
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
   */
  protected function isColumnSerial($table_name, $schema_name) {
    $result = FALSE;

    switch ($table_name) {
      case $this->baseTable:
        $result = $schema_name == $this->idKey;
        break;

      case $this->revisionTable:
        $result = $schema_name == $this->revisionKey;
        break;
    }

    return $result;
  }

1100 1101 1102 1103 1104
  /**
   * Maps from an entity object to the storage record of the field data.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity object.
1105 1106
   * @param string $table_name
   *   (optional) The table name to map records to. Defaults to the data table.
1107 1108 1109 1110
   *
   * @return \stdClass
   *   The record to store.
   */
1111 1112 1113 1114 1115
  protected function mapToDataStorageRecord(EntityInterface $entity, $table_name = NULL) {
    if (!isset($table_name)) {
      $table_name = $this->dataTable;
    }
    $record = $this->mapToStorageRecord($entity, $table_name);
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
    $record->langcode = $entity->language()->id;
    $record->default_langcode = intval($record->langcode == $entity->getUntranslated()->language()->id);
    return $record;
  }

  /**
   * Saves an entity revision.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity object.
   *
   * @return int
   *   The revision id.
   */
  protected function saveRevision(EntityInterface $entity) {
1131
    $record = $this->mapToStorageRecord($entity, $this->revisionTable);
1132 1133 1134 1135

    $entity->preSaveRevision($this, $record);

    if ($entity->isNewRevision()) {
1136 1137 1138 1139
      $insert_id = $this->database
        ->insert($this->revisionTable, array('return' => Database::RETURN_INSERT_ID))
        ->fields((array) $record)
        ->execute();
1140
      // Even if this is a new revision, the revision ID key might have been
1141 1142 1143 1144
      // set in which case we should not override the provided revision ID.
      if (!isset($record->{$this->revisionKey})) {
        $record->{$this->revisionKey} = $insert_id;
      }
1145
      if ($entity->isDefaultRevision()) {
1146
        $this->database->update($this->entityType->getBaseTable())
1147 1148 1149 1150 1151 1152
          ->fields(array($this->revisionKey => $record->{$this->revisionKey}))
          ->condition($this->idKey, $record->{$this->idKey})
          ->execute();
      }
    }
    else {
1153 1154 1155 1156 1157
      $this->database
        ->update($this->revisionTable)
        ->fields((array) $record)
        ->condition($this->revisionKey, $record->{$this->revisionKey})
        ->execute();
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
    }

    // Make sure to update the new revision key for the entity.
    $entity->{$this->revisionKey}->value = $record->{$this->revisionKey};

    return $record->{$this->revisionKey};
  }

  /**
   * {@inheritdoc}
   */
  public function getQueryServiceName() {
    return 'entity.query.sql';
  }

  /**
1174 1175 1176 1177 1178 1179 1180
   * Loads values of configurable fields for a group of entities.
   *
   * Loads all fields for each entity object in a group of a single entity type.
   * The loaded field values are added directly to the entity objects.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface[] $entities
   *   An array of entities keyed by entity ID.
1181
   */
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193
  protected function loadFieldItems(array $entities) {
    if (empty($entities) || !$this->entityType->isFieldable()) {
      return;
    }

    $age = static::FIELD_LOAD_CURRENT;
    foreach ($entities as $entity) {
      if (!$entity->isDefaultRevision()) {
        $age = static::FIELD_LOAD_REVISION;
        break;
      }
    }
1194 1195
    $load_current = $age == static::FIELD_LOAD_CURRENT;

1196
    // Collect entities ids, bundles and languages.
1197 1198
    $bundles = array();
    $ids = array();
1199
    $default_langcodes = array();
1200 1201 1202
    foreach ($entities as $key => $entity) {
      $bundles[$entity->bundle()] = TRUE;
      $ids[] = $load_current ? $key : $entity->getRevisionId();
1203
      $default_langcodes[$key] = $entity->getUntranslated()->language()->id;
1204 1205 1206
    }

    // Collect impacted fields.
1207
    $storage_definitions = array();
1208
    $definitions = array();
1209
    $table_mapping = $this->getTableMapping();
1210
    foreach ($bundles as $bundle => $v) {
1211
      $definitions[$bundle] = $this->entityManager->getFieldDefinitions($this->entityTypeId, $bundle);
1212 1213
      foreach ($definitions[$bundle] as $field_name => $field_definition) {
        $storage_definition = $field_definition->getFieldStorageDefinition();
1214
        if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
1215
          $storage_definitions[$field_name] = $storage_definition;
1216
        }
1217 1218 1219 1220
      }
    }

    // Load field data.
1221
    $langcodes = array_keys(language_list(LanguageInterface::STATE_ALL));
1222
    foreach ($storage_definitions as $field_name => $storage_definition) {
1223
      $table = $load_current ? $table_mapping->getDedicatedDataTableName($storage_definition) : $table_mapping->getDedicatedRevisionTableName($storage_definition);
1224

1225 1226 1227
      // Ensure that only values having valid languages are retrieved. Since we
      // are loading values for multiple entities, we cannot limit the query to
      // the available translations.
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
      $results = $this->database->select($table, 't')
        ->fields('t')
        ->condition($load_current ? 'entity_id' : 'revision_id', $ids, 'IN')
        ->condition('deleted', 0)
        ->condition('langcode', $langcodes, 'IN')
        ->orderBy('delta')
        ->execute();

      $delta_count = array();
      foreach ($results as $row) {
1238
        $bundle = $entities[$row->entity_id]->bundle();
1239

1240 1241
        // Ensure that records for non-translatable fields having invalid
        // languages are skipped.
1242
        if ($row->langcode == $default_langcodes[$row->entity_id] || $definitions[$bundle][$field_name]->isTranslatable()) {
1243 1244
          if (!isset($delta_count[$row->entity_id][$row->langcode])) {
            $delta_count[$row->entity_id][$row->langcode] = 0;
1245 1246
          }

1247
          if ($storage_definition->getCardinality() == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED || $delta_count[$row->entity_id][$row->langcode] < $storage_definition->getCardinality()) {