feat: adds get_object_collections API and tests

openedx_learning/apps/authoring/collections/api.py

@@ -21,6 +21,7 @@
     "get_collection",
     "get_collections",
     "get_learning_package_collections",
+    "get_object_collections",
     "remove_from_collections",
     "update_collection",
 ]
@@ -160,6 +161,16 @@ def remove_from_collections(
     return total_deleted
 
 
+def get_object_collections(object_id: int) -> QuerySet[Collection]:
+    """
+    Get all collections associated with a given PublishableEntity.
+
+    Only enabled collections are returned.
+    """
+    entity = PublishableEntity.objects.get(pk=object_id)
+    return entity.collections.filter(enabled=True).order_by("pk")
+
+
 def get_learning_package_collections(learning_package_id: int) -> QuerySet[Collection]:
     """
     Get all collections for a given learning package

tests/openedx_learning/apps/authoring/collections/test_api.py

@@ -199,6 +199,7 @@ class CollectionContentsTestCase(CollectionTestCase):
     collection0: Collection
     collection1: Collection
     collection2: Collection
+    disabled_collection: Collection
 
     @classmethod
     def setUpTestData(cls) -> None:
@@ -268,6 +269,17 @@ def setUpTestData(cls) -> None:
                 cls.draft_entity.id,
             ]),
         )
+        cls.disabled_collection = collection_api.create_collection(
+            cls.learning_package.id,
+            title="Disabled Collection",
+            created_by=None,
+            description="This disabled collection contains 1 object",
+            contents_qset=PublishableEntity.objects.filter(id__in=[
+                cls.published_entity.id,
+            ]),
+        )
+        cls.disabled_collection.enabled = False
+        cls.disabled_collection.save()
 
     def test_create_collection_contents(self):
         """
@@ -371,6 +383,18 @@ def test_remove_from_collections(self):
         self.collection2.refresh_from_db()
         assert self.collection2.modified == modified_time
 
+    def test_get_object_collections(self):
+        """
+        Tests fetching the enabled collections which contain a given object.
+        """
+        collections = collection_api.get_object_collections(
+            self.published_entity.id,
+        )
+        assert list(collections) == [
+            self.collection1,
+            self.collection2,
+        ]
+
 
 class UpdateCollectionTestCase(CollectionTestCase):
     """