CollectionItemValidationTrigger

API / CollectionItemValidationTrigger<TItem> class

Represents a collection item validation trigger. Instead of triggering a validation only when the collection changes, a validation may be triggered by any of the contained items when they themselves change.

This is useful when within the collection there is a field that needs to be unique, such as a unique name for each item in the collection.

Extends ValidationTrigger<INotifyCollectionChanged<TItem> & Iterable<TItem>>.

class CollectionItemValidationTrigger<TItem>
    extends ValidationTrigger<INotifyCollectionChanged<TItem> | Iterable<TItem>>

Source reference: src/validation/triggers/CollectionItemValidationTrigger.ts:43.

Generic Parameters

• TItem - The type of items the collection contains.

Constructors

• constructor - Initializes a new instance of the CollectionItemValidationTrigger<TItem> class.

Properties

• inherited readonly trigger - Gets the source object that triggers validation.
• inherited readonly validationTriggered - Gets an event that is raised whenever the source object triggers a validation.

Methods

• override protected subscribeToTarget - Subscribes to collection and item changes.
• override protected unsubscribeFromTarget - Unsubscribes from collection and item changes.

Inheritance Hierarchy

• ValidationTrigger<TTrigger>
  • ViewModelChangedValidationTrigger<TViewModel>
  • CollectionChangedValidationTrigger<TItem, TCollection>
  • CollectionReorderedValidationTrigger<TItem, TCollection>
  • SetChangedValidationTrigger<TItem, TSet>
  • MapChangedValidationTrigger<TKey, TItem, TMap>
  • CollectionItemValidationTrigger<TItem>
  • SetItemValidationTrigger<TItem>
  • MapItemValidationTrigger<TKey, TItem>