Reset advertised_start field course rerun

PLAT-295

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -1765,6 +1765,13 @@ class RerunCourseTest(ContentStoreTestCase):
         self.assertEqual(1, len(source_videos))
         self.assertEqual(source_videos, target_videos)
 
+    def test_rerun_course_resets_advertised_date(self):
+        source_course = CourseFactory.create(advertised_start="01-12-2015")
+        destination_course_key = self.post_rerun_request(source_course.id)
+        destination_course = self.store.get_course(destination_course_key)
+
+        self.assertEqual(None, destination_course.advertised_start)
+
     def test_rerun_of_rerun(self):
         source_course = CourseFactory.create()
         rerun_course_key = self.post_rerun_request(source_course.id)

cms/djangoapps/contentstore/views/course.py

@@ -786,6 +786,9 @@ def _rerun_course(request, org, number, run, fields):
     # Mark the action as initiated
     CourseRerunState.objects.initiated(source_course_key, destination_course_key, request.user, fields['display_name'])
 
+    # Clear the fields that must be reset for the rerun
+    fields['advertised_start'] = None
+
     # Rerun the course as a new celery task
     json_fields = json.dumps(fields, cls=EdxJSONEncoder)
     rerun_course.delay(unicode(source_course_key), unicode(destination_course_key), request.user.id, json_fields)