lookup type isnull does not work

[nmqanh]

I tried with

class ContainerChainedFilter(ChainedFilterSet):
    estimate_time = AllLookupsFilter(name='estimate_time')
    step = AllLookupsFilter(name='step')

    class Meta:
        model = ContainerSession
        fields = ['estimate_time', 'step']

step work with step__gte, step__gt, step__lt, step__lte.... but not work with
step__isnull=True, step__isnull=False, step__isnull=1, step__isnull=0...
Every lookup type work except isnull

[Rigdon]

Just wanted to leave a note that I've been experiencing this too. Haven't had time to really dig into it but I'll try soon.

[rpkilby]

Was this fixed by 3706d2c?