I think there's a lot of common in those two methods, I wonder if we can consolidate them down into one method. Plus, the coverage of es_app_to_dict worries me.

This is in mkt/webapps/utils.py btw.

Possibly moving from tastypie to DRF (bug 910623 among others) will allow us to get rid of most of it, by converting it to a serializer class that can then be inherited to support the ES variant. Bonus: better creation/edition support.