models.py 文件源码

def clean(self):
        # make sure user.email is unique - we can't use the unique keyword on
        # the field definition because both User and Organization subclass
        # Owner but only user has an email field
        if User.objects(email=self.email, id__ne=self.id):
            raise me.ValidationError("User with email '%s' already exists."
                                     % self.email)

        super(User, self).clean()