Don't violate the empty-dict vs None semantics of student_module during delete_many

2015-08-10 14:42:18 -04:00
parent d502987c5f
commit 93b1b69854
1 changed files with 1 additions and 1 deletions
--- a/lms/djangoapps/courseware/user_state_client.py
+++ b/lms/djangoapps/courseware/user_state_client.py
@@ -253,7 +253,7 @@ class DjangoXBlockUserStateClient(XBlockUserStateClient):
        student_modules = self._get_student_modules(username, block_keys)
        for student_module, _ in student_modules:
            if fields is None:
-                student_module.state = None
+                student_module.state = "{}"
            else:
                current_state = json.loads(student_module.state)
                for field in fields: