Instance Method

awakeFromInsert

Provides an opportunity to add code into the life cycle of the managed object when it is initially created.

Declaration

- (void)awakeFromInsert;

Discussion

You typically use this method to initialize special default property values. This method is invoked only once in the object's lifetime.

If you want to set attribute values in an implementation of this method, you should typically use primitive accessor methods (either setPrimitiveValue:forKey: or—better—the appropriate custom primitive accessors). This ensures that the new values are treated as baseline values rather than being recorded as undoable changes for the properties in question.

Special Considerations

If you create a managed object then perform undo operations to bring the managed object context to a state prior to the object’s creation, then perform redo operations to bring the managed object context back to a state after the object’s creation, awakeFromInsert is not invoked a second time.

You are typically discouraged from performing fetches within an implementation of awakeFromInsert. Although it is allowed, execution of the fetch request can trigger the sending of internal Core Data notifications which may have unwanted side-effects. For example, in macOS, an instance of NSArrayController may end up inserting a new object into its content array twice.

See Also

Managing Change Events

contextShouldIgnoreUnmodeledPropertyChanges

A Boolean value that indicates whether instances of the class should be marked as having changes if an unmodeled property is changed.

- awakeFromFetch

Provides an opportunity to add code into the life cycle of the managed object when it is being fulfilled from a fault.

- awakeFromSnapshotEvents:

Provides an opportunity to add code into the life cycle of the managed object when it is being fulfilled from a snapshot.

- changedValues

Returns a dictionary containing the keys and (old) values of persistent properties that have been changed since the last fetching or saving of the managed object.

- changedValuesForCurrentEvent

Returns a dictionary containing the keys and old values of persistent properties that have changed since the last posting of NSManagedObjectContextObjectsDidChangeNotification.

- committedValuesForKeys:

Returns a dictionary of the last fetched or saved values of the managed object for the properties specified by the given keys.

- prepareForDeletion

Provides an opportunity to add code into the life cycle of the managed object when it is about to be deleted.

- willSave

Provides an opportunity to add code into the life cycle of the managed object when it is about to be saved.

- didSave

Provides an opportunity to add code into the life cycle of the managed object after the managed object’s context completes a save operation.

- willTurnIntoFault

Provides an opportunity to add code into the life cycle of the managed object before it is converted to a fault.

- didTurnIntoFault

Provides an opportunity to add code into the life cycle of the managed object when it is turned into a fault.

+ fetchRequest

Returns a new fetch request initialized with the entity represented by this subclass.