Django REST framework QueryFields documentation

Allows clients to control which fields will be sent in the API response. The idea is based on a recipe described in the official documentation, Dynamically modifying fields, adapted to allow API users to specify fields via GET request query parameters.

Doing the filtering server-side instead of client-side can have advantages:

  • Fewer bytes down the wire = snappier ajax for your webapps

  • Less backend server load if expensive-to-serialize fields go unneeded

  • For thin clients; a better choice if client-side is a dumb/low-power device