Merge pull request #3725 from carsongee/cg/transcript_xmlmodulestore_fix

Fix bug affecting video transcripts in XMLModulesStore courses

common/lib/xmodule/xmodule/video_module/video_handlers.py

@@ -195,12 +195,21 @@ class VideoStudentViewHandlers(object):
 
         if transcript_name:
             course_location = CourseDescriptor.id_to_location(self.course_id)
-            course = self.descriptor.runtime.modulestore.get_item(course_location)
-            if course.static_asset_path:
+
+            # Get the asset path for course
+            asset_path = None
+            if hasattr(self.descriptor.runtime, 'modulestore'):
+                course = self.descriptor.runtime.modulestore.get_item(course_location)
+                asset_path = course.static_asset_path
+            else:
+                # Handle XML Courses that don't have modulestore in the runtime
+                asset_path = getattr(self.descriptor, 'data_dir', None)
+
+            if asset_path:
                 response = Response(
                     status=307,
                     location='/static/{0}/{1}'.format(
-                        course.static_asset_path,
+                        asset_path,
                         subs_filename(transcript_name, self.transcript_language)
                     )
                 )