Fix save gallery

api/v1/serializers/mixins.py

@@ -110,8 +110,7 @@ class DispatchContentMixin(object):
                     g.position = cdata['position']
                     g.title = cdata['title']
                     g.uuid = cdata['uuid']
-                    obj_attr = getattr(g, obj_type)
+                    setattr(g, obj_type, obj)
-                    obj_attr = obj
                     g.save()
                     if 'images' in cdata:
                         for image in cdata['images']:
@@ -131,8 +130,7 @@ class DispatchContentMixin(object):
                         title=cdata['title'],
                         uuid=cdata['uuid'],
                     )
-                    obj_attr = getattr(g, obj_type)
+                    setattr(g, obj_type, obj)
-                    obj_attr = obj
                     g.save()
                     if 'images' in cdata:
                         for image in cdata['images']: