如何显示验证错误，因为django管理员默认错误

Question

有没有办法以标准方式显示验证错误，因为其他错误？

class Student(models.Model):
...

    def save(self, *args, **kwargs):
        try:
            super(Student, self).save(*args, **kwargs)
        except ValidationError:
            raise forms.ValidationError('There aren't places anymore')

Answer 1

from django.core.exceptions import ValidationError

class MyModel(models.Model):

    def is_available(self):
        #do check here
        return result

    def clean(self):
        if not self.is_available():
            raise ValidationError('Item already booked for those dates')