Django queryset filter with if condition

Question

How to apply a filter in django queryset only if a condition is met. I have a filter object that contains forms list. if forms contains "all" then i want to fetch all objects of the AnswerDetails model else i want to fetch only the u_id in the forms list

Code:

fil = self.d.get('filter', None)   
f_uid = fil.get('forms',["all"])
if "all" in f_uid:
    f_uid = []
    a = AnswerDetails.objects.filter(proj=_p, 
        form__u_id__in=f_uid).order_by('-saved_on')

Answer 1

You can just remove form filtration:

a = AnswerDetails.objects.filter(proj=_p).order_by('-saved_on')

If you want to exclude something then you can also do this

a = AnswerDetails.objects.filter(proj=_p).exclude(form__u_id__in=f_uid).order_by('-saved_on')