class CustomDateFilter(DateFilter):
def filter(self, qs, value):
    if value:
        filter_lookups = {
            "%s__month" % (self.field_name, ): value.month,
            "%s__year" % (self.field_name, ): value.year
        }
        qs = qs.filter(**filter_lookups)
    return qs

类ExpenseDateFilter(FilterSet): date=customdatefilter(字段_name='date')

class Meta:
    model = Expense
    fields = ('project__id', 'date')