#models.py
class DateFilter(models.Model):
date = models.ForeignKey(...)
man = models.ForeignKey(...)
#views.py
date_filter = DateFilter.date.objects.???
man_filter = DateFilter.objects.man.???
def date_filter(self, date=date_filter, man=man_filter):
""" Фильтр """
result = Blank.objects.filter(wash_man__man=man, date__date=date)
return result