Fix field serialization

cms/djangoapps/contentstore/tasks.py

@@ -4,7 +4,9 @@ This file contains celery tasks for contentstore views
 
 from celery.task import task
 from django.contrib.auth.models import User
+import json
 from xmodule.modulestore.django import modulestore
+from xmodule.course_module import CourseFields
 
 from xmodule.modulestore.exceptions import DuplicateCourseError, ItemNotFoundError
 from course_action_state.models import CourseRerunState
@@ -18,9 +20,10 @@ def rerun_course(source_course_key_string, destination_course_key_string, user_i
     Reruns a course in a new celery task.
     """
     try:
-        # deserialize the keys
+        # deserialize the payload
         source_course_key = CourseKey.from_string(source_course_key_string)
         destination_course_key = CourseKey.from_string(destination_course_key_string)
+        fields = deserialize_fields(fields)
 
         # use the split modulestore as the store for the rerun course,
         # as the Mongo modulestore doesn't support multiple runs of the same course.
@@ -53,3 +56,10 @@ def rerun_course(source_course_key_string, destination_course_key_string, user_i
             pass
 
         return "exception: " + unicode(exc)
+
+
+def deserialize_fields(json_fields):
+    fields = json.loads(json_fields)
+    for field_name, value in fields.iteritems():
+        fields[field_name] = getattr(CourseFields, field_name).from_json(value)
+    return fields

cms/djangoapps/contentstore/views/course.py

@@ -23,6 +23,7 @@ from xmodule.modulestore.django import modulestore
 from xmodule.contentstore.content import StaticContent
 from xmodule.tabs import PDFTextbookTabs
 from xmodule.partitions.partitions import UserPartition, Group
+from xmodule.modulestore import EdxJSONEncoder
 from xmodule.modulestore.exceptions import ItemNotFoundError, DuplicateCourseError
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.locations import Location
@@ -614,7 +615,8 @@ def _rerun_course(request, org, number, run, fields):
     CourseRerunState.objects.initiated(source_course_key, destination_course_key, request.user, fields['display_name'])
 
     # Rerun the course as a new celery task
-    rerun_course.delay(unicode(source_course_key), unicode(destination_course_key), request.user.id, fields)
+    json_fields = json.dumps(fields, cls=EdxJSONEncoder)
+    rerun_course.delay(unicode(source_course_key), unicode(destination_course_key), request.user.id, json_fields)
 
     # Return course listing page
     return JsonResponse({