覆盖Django的Model.validate_unique的正确方法是什么?我尝试覆盖它并提升我自己的ValidationError
,但是出现了这个错误:
AttributeError: 'ValidationError' object has no attribute 'message_dict'
答案 0 :(得分:22)
Django希望您的ValidationErrors可以使用字典而不是字符串进行实例化:
from django.db.models import Model
from django.core.exceptions import ValidationError
from django.core.exceptions import NON_FIELD_ERRORS
class Person(Model):
...
def validate_unique(self, *args, **kwargs):
super(Person, self).validate_unique(*args, **kwargs)
if not self.id:
if self.__class__.objects.filter(...).exists():
raise ValidationError(
{
NON_FIELD_ERRORS: [
'Person with same ... already exists.',
],
}
)