fix: more validation of openedx_content to prevent corrupt states (#521)

Tests generated by Claude; fixes implemented by me.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: bradenmacdonald

src/openedx_content/applets/backup_restore/zipper.py

@@ -780,7 +780,7 @@ def _save(
             self._save_subsections(learning_package_obj, containers)
             self._save_sections(learning_package_obj, containers)
             self._save_collections(learning_package_obj, collections)
-            publishing_api.publish_all_drafts(learning_package_obj.id)
+        publishing_api.publish_all_drafts(learning_package_obj.id)
 
         with publishing_api.bulk_draft_changes_for(learning_package_obj.id):
             self._save_draft_versions(components, containers, component_static_files)

src/openedx_content/applets/publishing/api.py

@@ -237,6 +237,14 @@ def create_publishable_entity_version(
             created_by_id=created_by,
         )
         if dependencies:
+            # Validate that dependencies are from the same learning package:
+            if (
+                PublishableEntity.objects.filter(id__in=dependencies)
+                .exclude(learning_package_id=version.entity.learning_package_id)
+                .exists()
+            ):
+                raise ValidationError("Dependencies must be from the same learning package")
+            # Store dependencies:
             set_version_dependencies(version.id, dependencies)
 
         set_draft_version(
@@ -466,6 +474,8 @@ def publish_from_drafts(
     By default, this will also publish all dependencies (e.g. unpinned children)
     of the Drafts that are passed in.
     """
+    if DraftChangeLogContext.get_active_draft_change_log(learning_package_id) is not None:
+        raise ValidationError("Cannot publish while in bulk_draft_changes_for().")
     if published_at is None:
         published_at = datetime.now(tz=timezone.utc)
 
@@ -509,6 +519,12 @@ def publish_from_drafts(
                 # Skip duplicates that we might get from expanding dependencies.
                 if draft.pk in published_draft_ids:
                     continue
+                # Validate Learning Package here where it won't require any extra queries
+                if draft.entity.learning_package_id != learning_package_id:
+                    raise ValidationError(
+                        f"Draft entity (id={draft.entity.id}) is from learning package "
+                        f"{draft.entity.learning_package_id}; expected learning package {learning_package_id}."
+                    )
 
                 try:
                     old_version = draft.entity.published.version
@@ -925,6 +941,17 @@ def set_draft_version(
         # block is bookkeeping in our DraftChangeLog.
         draft.version_id = publishable_entity_version_pk
 
+        # Validate the entity
+        if publishable_entity_version_pk is not None:
+            if draft.entity.id != PublishableEntityVersion.objects.only("entity_id").get(
+                pk=publishable_entity_version_pk
+            ).entity_id:
+                invalid_pev = PublishableEntityVersion.objects.get(pk=publishable_entity_version_pk)
+                raise ValidationError(
+                    f"Entity mismatch - the specified PublishableEntityVersion ({repr(invalid_pev)}) does not match "
+                    f"the PublishableEntity ({repr(draft.entity)})."
+                )
+
         # Check to see if we're inside a context manager for an active
         # DraftChangeLog (i.e. what happens if the caller is using the public
         # bulk_draft_changes_for() API call), or if we have to make our own.

tests/openedx_content/applets/containers/test_api.py

@@ -373,10 +373,10 @@ def test_create_container_queries(lp: LearningPackage, child_entity1: TestEntity
         "container_cls": TestContainer,
     }
     # The exact numbers here aren't too important - this is just to alert us if anything significant changes.
-    with django_assert_num_queries(33):
+    with django_assert_num_queries(34):
         containers_api.create_container_and_version(lp.id, container_code="c1", **base_args)
     # And try with a a container that has children:
-    with django_assert_num_queries(34):
+    with django_assert_num_queries(37):
         containers_api.create_container_and_version(lp.id, container_code="c2", **base_args, entities=[child_entity1])