feat: make downstream copied tags editable when upstream block is del…

…eted

cms/djangoapps/contentstore/helpers.py

@@ -30,6 +30,7 @@
 import openedx.core.djangoapps.content_staging.api as content_staging_api
 import openedx.core.djangoapps.content_tagging.api as content_tagging_api
 
+from .models import PublishableEntityLink
 from .utils import reverse_course_url, reverse_library_url, reverse_usage_url
 
 log = logging.getLogger(__name__)
@@ -324,6 +325,18 @@ def import_staged_content_from_user_clipboard(parent_key: UsageKey, request) ->
     return new_xblock, notices
 
 
+def make_downstream_tags_editable(upstream_usage_key: UsageKey) -> None:
+    """
+    Update the tags copied to the downstream objects to make them editable.
+
+    This should be called when the upstream link to the downstream object is severed.
+    """
+    for link in PublishableEntityLink.objects.filter(
+        upstream_usage_key=upstream_usage_key,
+    ):
+        content_tagging_api.make_copied_tags_editable(str(link.downstream_usage_key))
+
+
 def _fetch_and_set_upstream_link(
     copied_from_block: str,
     copied_from_version_num: int,

cms/djangoapps/contentstore/views/tests/test_clipboard_paste.py

@@ -477,6 +477,16 @@ def test_paste_from_library_read_only_tags(self):
             assert object_tag.value in self.lib_block_tags
             assert object_tag.is_copied
 
+        # If we delete the upstream library block...
+        library_api.delete_library_block(self.lib_block_key)
+
+        # ...the copied tags remain, but should no longer be marked as "copied"
+        object_tags = tagging_api.get_object_tags(new_block_key)
+        assert len(object_tags) == len(self.lib_block_tags)
+        for object_tag in object_tags:
+            assert object_tag.value in self.lib_block_tags
+            assert not object_tag.is_copied
+
     def test_paste_from_library_copies_asset(self):
         """
         Assets from a library component copied into a subdir of Files & Uploads.

openedx/core/djangoapps/content_libraries/api.py

@@ -1112,6 +1112,10 @@ def delete_library_block(usage_key, remove_from_parent=True):
 
     authoring_api.soft_delete_draft(component.pk)
 
+    # Import here to avoid breaking the LMS
+    from cms.djangoapps.contentstore import helpers as studio_helpers
+    studio_helpers.make_downstream_tags_editable(usage_key)
+
     LIBRARY_BLOCK_DELETED.send_event(
         library_block=LibraryBlockData(
             library_key=library_key,

openedx/core/djangoapps/content_tagging/api.py

@@ -441,3 +441,4 @@ def tag_object(
 get_object_tags = oel_tagging.get_object_tags
 add_tag_to_taxonomy = oel_tagging.add_tag_to_taxonomy
 copy_tags_as_read_only = oel_tagging.copy_tags
+make_copied_tags_editable = oel_tagging.unmark_copied_tags