Inform openassessment to clear submission

The openassessment xblock stores some information that assumes
a given student module is never cleared, it needs to be informed of
this operation.

lms/djangoapps/instructor/enrollment.py

@@ -219,6 +219,8 @@ def reset_student_attempts(course_id, student, module_state_key, delete_module=F
         submissions.SubmissionError: unexpected error occurred while resetting the score in the submissions API.
 
     """
+    user_id = anonymous_id_for_user(student, course_id)
+    submission_cleared = False
     try:
         # A block may have children. Clear state on children first.
         block = modulestore().get_item(module_state_key)
@@ -229,16 +231,27 @@ def reset_student_attempts(course_id, student, module_state_key, delete_module=F
                 except StudentModule.DoesNotExist:
                     # If a particular child doesn't have any state, no big deal, as long as the parent does.
                     pass
+        if delete_module:
+            # Some blocks (openassessment) use StudentModule data as a key for internal submission data.
+            # Inform these blocks of the reset and allow them to handle their data.
+            clear_student_state = getattr(block, "clear_student_state", None)
+            if callable(clear_student_state):
+                clear_student_state(
+                    user_id=user_id,
+                    course_id=unicode(course_id),
+                    item_id=unicode(module_state_key)
+                )
+                submission_cleared = True
     except ItemNotFoundError:
         log.warning("Could not find %s in modulestore when attempting to reset attempts.", module_state_key)
 
-    # Reset the student's score in the submissions API
-    # Currently this is used only by open assessment (ORA 2)
-    # We need to do this *before* retrieving the `StudentModule` model,
-    # because it's possible for a score to exist even if no student module exists.
-    if delete_module:
+    # Reset the student's score in the submissions API, if xblock.clear_student_state has not done so already.
+    # TODO: Remove this once we've finalized and communicated how xblocks should handle clear_student_state
+    # and made sure that other xblocks relying on the submission api understand this is going away.
+    # We need to do this before retrieving the `StudentModule` model, because a score may exist with no student module.
+    if delete_module and not submission_cleared:
         sub_api.reset_score(
-            anonymous_id_for_user(student, course_id),
+            user_id,
             course_id.to_deprecated_string(),
             module_state_key.to_deprecated_string(),
         )

requirements/edx/github.txt

@@ -77,8 +77,8 @@ git+https://github.com/edx/XBlock.git@xblock-0.4.4#egg=XBlock==0.4.4
 -e git+https://github.com/edx/event-tracking.git@0.2.1#egg=event-tracking==0.2.1
 -e git+https://github.com/edx/django-splash.git@v0.2#egg=django-splash==0.2
 -e git+https://github.com/edx/acid-block.git@e46f9cda8a03e121a00c7e347084d142d22ebfb7#egg=acid-xblock
--e git+https://github.com/edx/edx-ora2.git@0.2.7#egg=ora2==0.2.7
--e git+https://github.com/edx/edx-submissions.git@0.1.3#egg=edx-submissions==0.1.3
+-e git+https://github.com/edx/edx-ora2.git@0.2.8#egg=ora2==0.2.8
+-e git+https://github.com/edx/edx-submissions.git@0.1.4#egg=edx-submissions==0.1.4
 git+https://github.com/edx/ease.git@release-2015-07-14#egg=ease==0.1.3
 git+https://github.com/edx/i18n-tools.git@v0.2#egg=i18n-tools==v0.2
 git+https://github.com/edx/edx-val.git@0.0.9#egg=edxval==0.0.9