code: def build_keys(request, database_name, collection_name):
      
      build_keys_with_mapreduce(database_name, collection_name)
      messages.success(request, _(
          "Successfully completed MapReduce operation. "
          "Key rebuild for custom report complete."))
      return HttpResponseRedirect(reverse("djmongo_show_dbs"))
docs: Perform the map/reduce to refresh the keys form.
         The display the custom report screen