Should ignore any invalidly formed query parameters for OrderingFilter. · Issue #4989 · encode/django-rest-framework (original) (raw)

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Description

Checklist

• I have verified that that issue exists against the master branch of Django REST framework.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• This is not a usage question. (Those should be directed to the discussion group instead.)
• This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• I have reduced the issue to the simplest possible case.
• I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

• Create a ViewSet with an OrderingFilter and add a field to order on (field_name)
• Call the viewset with ?ordering=--field_name

Expected behavior

No ordering to be applied

Actual behavior

Throws a 500 error because --field_name is passed to the queryset because over here an lstrip is done instead of just removing the first - character before validation.