- Issue created by @jeffam
Imagine that we want to allow a collection_item type for a single Collection, rather than all Collections of that type. Or for any Collection of any type that has a specific field value set.
We already have hook_collection_item_types_allowed_alter() which can alter the collection_item types returned from CollectionType::getAllowedCollectionItemTypes(). Both the hook and method can accept an optional $entity_type_id parameter and $bundle parameter.
We should add a $collection parameter to allow hook_collection_item_types_allowed_alter() allow modification of the allowed collection_item types based on some property of a Collection in contexts where that might matter.
A use case might be that we have more than one collection item type for a given entity type and bundle (e.g. node.article).
In one context, we might want to use the `default` collection item type to join an article node to a collection, but for one specific Collection we might want to use, say, the `tagged_item` collection item type.
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3.0
Code