+ nobj = objects
+ for key, fltr in filters.items():
+ if key != 'fn_type':
+ nobj = nobj.filter(fltr)
+ self.fn_types = nobj.order_by('fn_type').values_list(
+ 'fn_type', flat=True).distinct()
+ self.fn_types = [(fnt, FN_TYPES[fnt]) for fnt in self.fn_types]