interface EntityDefinitionUpdateManagerInterface in Zircon Profile 8

Defines an interface for managing entity definition updates.

During the application lifetime, the definitions of various entity types and their data components (e.g., fields for fieldable entity types) can change. For example, updated code can be deployed. Some entity handlers may need to perform complex or long-running logic in response to the change. For example, a SQL-based storage handler may need to update the database schema.

To support this, \Drupal\Core\Entity\EntityManagerInterface has methods to retrieve the last installed definitions as well as the definitions specified by the current codebase. It also has create/update/delete methods to bring the former up to date with the latter.

However, it is not the responsibility of the entity manager to decide how to report the differences or when to apply each update. This interface is for managing that.

This interface also provides methods to retrieve instances of the definitions to be updated ready to be manipulated. In fact when definitions change in code the system needs to be notified about that and the definitions stored in state need to be reconciled with the ones living in code. This typically happens in Update API functions, which need to take the system from a known state to another known state. Relying on the definitions living in code might prevent this, as the system might transition directly to the last available state, and thus skipping the intermediate steps. Manipulating the definitions in state allows to avoid this and ensures that the various steps of the update process are predictable and repeatable.

Hierarchy

• interface \Drupal\Core\Entity\EntityDefinitionUpdateManagerInterface

See also

\Drupal\Core\Entity\EntityManagerInterface::getDefinition()

\Drupal\Core\Entity\EntityManagerInterface::getLastInstalledDefinition()

\Drupal\Core\Entity\EntityManagerInterface::getFieldStorageDefinitions()

\Drupal\Core\Entity\EntityManagerInterface::getLastInstalledFieldStorageDefinitions()

hook_update_N()

1 file declares its use of EntityDefinitionUpdateManagerInterface

ContentTranslationUpdatesManager.php in core/modules/content_translation/src/ContentTranslationUpdatesManager.php

Contains \Drupal\content_translation\ContentTranslationUpdatesManager.

File

core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManagerInterface.php, line 47

Contains \Drupal\Core\Entity\EntityDefinitionUpdateManagerInterface.

Namespace

Drupal\Core\Entity

interface EntityDefinitionUpdateManagerInterface {

  /**
   * Indicates that a definition has just been created.
   *
   * @var int
   */
  const DEFINITION_CREATED = 1;

  /**
   * Indicates that a definition has changes.
   *
   * @var int
   */
  const DEFINITION_UPDATED = 2;

  /**
   * Indicates that a definition has just been deleted.
   *
   * @var int
   */
  const DEFINITION_DELETED = 3;

  /**
   * Checks if there are any definition updates that need to be applied.
   *
   * @return bool
   *   TRUE if updates are needed.
   */
  public function needsUpdates();

  /**
   * Gets a human readable summary of the detected changes.
   *
   * @return array
   *   An associative array keyed by entity type id. Each entry is an array of
   *   human-readable strings, each describing a change.
   */
  public function getChangeSummary();

  /**
   * Applies all the detected valid changes.
   *
   * Use this with care, as it will apply updates for any module, which will
   * lead to unpredictable results.
   *
   * @throws \Drupal\Core\Entity\EntityStorageException
   *   This exception is thrown if a change cannot be applied without
   *   unacceptable data loss. In such a case, the site administrator needs to
   *   apply some other process, such as a custom update function or a
   *   migration via the Migrate module.
   */
  public function applyUpdates();

  /**
   * Returns an entity type definition ready to be manipulated.
   *
   * When needing to apply updates to existing entity type definitions, this
   * method should always be used to retrieve a definition ready to be
   * manipulated.
   *
   * @param string $entity_type_id
   *   The entity type identifier.
   *
   * @return \Drupal\Core\Entity\EntityTypeInterface
   *   The entity type definition.
   */
  public function getEntityType($entity_type_id);

  /**
   * Installs a new entity type definition.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   */
  public function installEntityType(EntityTypeInterface $entity_type);

  /**
   * Applies any change performed to the passed entity type definition.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   */
  public function updateEntityType(EntityTypeInterface $entity_type);

  /**
   * Uninstalls an entity type definition.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   */
  public function uninstallEntityType(EntityTypeInterface $entity_type);

  /**
   * Returns a field storage definition ready to be manipulated.
   *
   * When needing to apply updates to existing field storage definitions, this
   * method should always be used to retrieve a storage definition ready to be
   * manipulated.
   *
   * @param string $name
   *   The field name.
   * @param string $entity_type_id
   *   The entity type identifier.
   *
   * @return \Drupal\Core\Field\FieldStorageDefinitionInterface
   *   The field storage definition.
   *
   * @todo Make this return a mutable storage definition interface when we have
   *   one. See https://www.drupal.org/node/2346329.
   */
  public function getFieldStorageDefinition($name, $entity_type_id);

  /**
   * Installs a new field storage definition.
   *
   * @param string $name
   *   The field storage definition name.
   * @param string $entity_type_id
   *   The target entity type identifier.
   * @param string $provider
   *   The name of the definition provider.
   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
   *   The field storage definition.
   */
  public function installFieldStorageDefinition($name, $entity_type_id, $provider, FieldStorageDefinitionInterface $storage_definition);

  /**
   * Applies any change performed to the passed field storage definition.
   *
   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
   *   The field storage definition.
   */
  public function updateFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);

  /**
   * Uninstalls a field storage definition.
   *
   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
   *   The field storage definition.
   */
  public function uninstallFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);

}

Members

Name	Modifiers	Type	Description	Overrides
EntityDefinitionUpdateManagerInterface::applyUpdates	public	function	Applies all the detected valid changes.	1
EntityDefinitionUpdateManagerInterface::DEFINITION_CREATED		constant	Indicates that a definition has just been created.
EntityDefinitionUpdateManagerInterface::DEFINITION_DELETED		constant	Indicates that a definition has just been deleted.
EntityDefinitionUpdateManagerInterface::DEFINITION_UPDATED		constant	Indicates that a definition has changes.
EntityDefinitionUpdateManagerInterface::getChangeSummary	public	function	Gets a human readable summary of the detected changes.	1
EntityDefinitionUpdateManagerInterface::getEntityType	public	function	Returns an entity type definition ready to be manipulated.	1
EntityDefinitionUpdateManagerInterface::getFieldStorageDefinition	public	function	Returns a field storage definition ready to be manipulated.	1
EntityDefinitionUpdateManagerInterface::installEntityType	public	function	Installs a new entity type definition.	1
EntityDefinitionUpdateManagerInterface::installFieldStorageDefinition	public	function	Installs a new field storage definition.	1
EntityDefinitionUpdateManagerInterface::needsUpdates	public	function	Checks if there are any definition updates that need to be applied.	1
EntityDefinitionUpdateManagerInterface::uninstallEntityType	public	function	Uninstalls an entity type definition.	1
EntityDefinitionUpdateManagerInterface::uninstallFieldStorageDefinition	public	function	Uninstalls a field storage definition.	1
EntityDefinitionUpdateManagerInterface::updateEntityType	public	function	Applies any change performed to the passed entity type definition.	1
EntityDefinitionUpdateManagerInterface::updateFieldStorageDefinition	public	function	Applies any change performed to the passed field storage definition.	1