refactor: moves tags_count into LibraryItem

because anything that appears in a library may be tagged.

Author: pomegranited

openedx/core/djangoapps/content_libraries/api/block_metadata.py

@@ -26,8 +26,6 @@ class LibraryXBlockMetadata(PublishableItem):
     Class that represents the metadata about an XBlock in a content library.
     """
     usage_key: LibraryUsageLocatorV2
-    # TODO: move tags_count to LibraryItem as all objects under a library can be tagged.
-    tags_count: int = 0
 
     @classmethod
     def from_component(cls, library_key, component, associated_collections=None):

openedx/core/djangoapps/content_libraries/api/libraries.py

@@ -184,6 +184,7 @@ class LibraryItem:
     created: datetime
     modified: datetime
     display_name: str
+    tags_count: int = 0
 
 
 @dataclass(frozen=True, kw_only=True)

openedx/core/djangoapps/content_libraries/rest_api/serializers.py

@@ -138,6 +138,7 @@ class PublishableItemSerializer(serializers.Serializer):
     """
     id = serializers.SerializerMethodField()
     display_name = serializers.CharField()
+    tags_count = serializers.IntegerField(read_only=True)
     last_published = serializers.DateTimeField(format=DATETIME_FORMAT, read_only=True)
     published_by = serializers.CharField(read_only=True)
     last_draft_created = serializers.DateTimeField(format=DATETIME_FORMAT, read_only=True)
@@ -149,7 +150,6 @@ class PublishableItemSerializer(serializers.Serializer):
     # When creating a new XBlock in a library, the slug becomes the ID part of
     # the definition key and usage key:
     slug = serializers.CharField(write_only=True)
-    tags_count = serializers.IntegerField(read_only=True)
 
     collections = CollectionMetadataSerializer(many=True, required=False)
     can_stand_alone = serializers.BooleanField(read_only=True)