Issue

The guides onhttps://django-rest-framework-json-api.readthedocs.io/en/stable/usage.html#configuration recommend including therest_framework_json_api.filters.QueryParameterValidationFilter in initial configuration which is good advice, but by default, the Django REST Framework UI provides a dropdown which allows you to pickformat=api orformat=vnd.api+json

Without allowing theformat parameter through you get the following error:

HTTP 400 Bad RequestAllow: GET, POST, HEAD, OPTIONSContent-Type: application/vnd.api+jsonVary: Accept{    "errors": [        {            "detail": "invalid query parameter: format",            "source": {                "pointer": "/data"            },            "status": "400"        }    ]}

What needs to change

• We document to changeURL_FORMAT_OVERRIDE tocontentFormat in our README.
• In theQueryParameterValidationFilter it's checked whether a query parameter is passed on which is equal configured value inURL_FORMAT_OVERRIDE. If this is true and the value ofURL_FORMAT_OVERRIDE is set to something else thanformat then we let the user pass. IfURL_FORMAT_OVERRIDE is still set toformat a 400 error is raised (as would be the case today already without this change).

referenceDRF docs

This issue is created out of the pull request#535