EntityDefinitionUpdateManagerInterface

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

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()

File

core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManagerInterface.php, line 42

Namespace

Drupal\Core\Entity

Members

Name Modifiers Type Description
EntityDefinitionUpdateManagerInterface::applyUpdates public function Applies all the detected valid changes.
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.
EntityDefinitionUpdateManagerInterface::getEntityType public function Returns an entity type definition ready to be manipulated.
EntityDefinitionUpdateManagerInterface::getFieldStorageDefinition public function Returns a field storage definition ready to be manipulated.
EntityDefinitionUpdateManagerInterface::installEntityType public function Installs a new entity type definition.
EntityDefinitionUpdateManagerInterface::installFieldStorageDefinition public function Installs a new field storage definition.
EntityDefinitionUpdateManagerInterface::needsUpdates public function Checks if there are any definition updates that need to be applied.
EntityDefinitionUpdateManagerInterface::uninstallEntityType public function Uninstalls an entity type definition.
EntityDefinitionUpdateManagerInterface::uninstallFieldStorageDefinition public function Uninstalls a field storage definition.
EntityDefinitionUpdateManagerInterface::updateEntityType public function Applies any change performed to the passed entity type definition.
EntityDefinitionUpdateManagerInterface::updateFieldStorageDefinition public function Applies any change performed to the passed field storage definition.
doc_Drupal
2016-10-29 09:05:02
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