fix: Bugs sending LIBRARY_CONTAINER_UPDATED signal

Author: ChrisChV

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

@@ -911,7 +911,7 @@ def set_library_block_olx(usage_key: LibraryUsageLocatorV2, new_olx_str: str) ->
         LIBRARY_CONTAINER_UPDATED.send_event(
             library_container=LibraryContainerData(
                 library_key=usage_key.lib_key,
-                container_key=container.container_pk,
+                container_key=str(container.container_key),
                 background=True,
             )
         )
@@ -1252,7 +1252,7 @@ def delete_library_block(usage_key: LibraryUsageLocatorV2, remove_from_parent=Tr
         LIBRARY_CONTAINER_UPDATED.send_event(
             library_container=LibraryContainerData(
                 library_key=library_key,
-                container_key=container.container_pk,
+                container_key=str(container.container_key),
                 background=True,
             )
         )

openedx/core/djangoapps/content_libraries/library_context.py

@@ -126,7 +126,7 @@ def send_container_updated_events(self, usage_key: UsageKeyV2):
             LIBRARY_CONTAINER_UPDATED.send_event(
                 library_container=LibraryContainerData(
                     library_key=usage_key.lib_key,
-                    container_key=container.container_pk,
+                    container_key=str(container.container_key),
                     background=True,
                 )
             )

openedx/core/djangoapps/content_libraries/tests/test_api.py

@@ -820,7 +820,7 @@ def _validate_calls_of_html_block(self, event_mock):
                 "sender": None,
                 "library_container": LibraryContainerData(
                     library_key=self.lib1.library_key,
-                    container_key=self.unit1.container_pk,
+                    container_key=str(self.unit1.container_key),
                     background=True,
                 )
             },
@@ -832,7 +832,7 @@ def _validate_calls_of_html_block(self, event_mock):
                 "sender": None,
                 "library_container": LibraryContainerData(
                     library_key=self.lib1.library_key,
-                    container_key=self.unit2.container_pk,
+                    container_key=str(self.unit2.container_key),
                     background=True,
                 )
             },