cdodge/pass-depth-on-course-fecth: pass along the depth parameter to minimize…

cdodge/pass-depth-on-course-fecth: pass along the depth parameter to minimize round trips to the mongodb. Also turn on MongoDB panel on devstack.py to help with instrumentation

lms/djangoapps/api_manager/courses/views.py

@@ -594,7 +594,7 @@ class CoursesDetail(SecureAPIView):
         depth_int = int(depth)
         # get_course_by_id raises an Http404 if the requested course is invalid
         # Rather than catching it, we just let it bubble up
-        course_descriptor, course_key, course_content = get_course(request, request.user, course_id)  # pylint: disable=W0612
+        course_descriptor, course_key, course_content = get_course(request, request.user, course_id, depth=depth_int)  # pylint: disable=W0612
         if not course_descriptor:
             return Response({}, status=status.HTTP_404_NOT_FOUND)
         if depth_int > 0:

lms/envs/devstack.py

@@ -60,6 +60,16 @@ DEBUG_TOOLBAR_CONFIG = {
     'SHOW_TOOLBAR_CALLBACK': lambda _: True,
 }
 
+INSTALLED_APPS += (
+    # Mongo perf stats
+    'debug_toolbar_mongo',
+    )
+
+
+DEBUG_TOOLBAR_PANELS += (
+   'debug_toolbar_mongo.panel.MongoDebugPanel',
+   )
+
 ########################### PIPELINE #################################
 
 PIPELINE_SASS_ARGUMENTS = '--debug-info --require {proj_dir}/static/sass/bourbon/lib/bourbon.rb'.format(proj_dir=PROJECT_ROOT)