当查询参数值不存在时，Django-filter 被忽略

Question

Code where problem occurs:

class GameFilter(FilterSet):
    release = MultipleChoiceFilter(choices=Game.RELEASE_CHOICES, method='release_filter', widget=CSVWidget, required=True)
  
    def release_filter(self, queryset, name, releases):
        if releases:
            ...
        return queryset

Lets say in my Game.RELEASE_CHOICES , one of my options is "2", this means this query is working for me http://localhost:8000/games/?release=2

In this case I can reach my breakpoint in release_filter method.

BUT

When I try to query this URL with non existing query parameter value

http://localhost:8000/games/?release=2156

The release_filter is not being executed, cant reach breakpoint at all and all I get in return is:

{
    "count": 0,
    "results": [],
    "page_size": 20
}

What I would like to achieve is the filter being executed despite of non existing query parameter value. Is it possible? Thank you for all possible answers.

Answer 1

You can try this:

releases = request.GET.get('release',None)
# if using DRF
# releases = request.query_params.get('release',None)
if releases and releases in dict(Game.RELEASE_CHOICES).keys():
    ...
return queryset