python - Django admin 输入错误后出现错误消息

Question

我想在 django admin 中添加对输入数据的验证，因此我已将此类代码添加到我的 models.py

class Score(models.Model):
  #fields description
    def save(self, *args, **kw):
        if (validating data):
            super(Score, self).save(*args, **kw)
        else:
            raise forms.ValidationError("Error input")

我无法理解必须在 ValidationError 中编写什么才能看到此消息。

Answer 1

您应该在 proper place 中执行此操作，而不是在保存

中

To assign exceptions to a specific field, instantiate the ValidationError with a dictionary, where the keys are the field names. We could update the previous example to assign the error to the pub_date field:

class Article(models.Model):
    ...
    def clean(self):
        # Don't allow draft entries to have a pub_date.
        if self.status == 'draft' and self.pub_date is not None:
            raise ValidationError({'pub_date': 'Draft entries may not have a publication date.'})
        ...