Question

我尝试覆盖我的文章模型的save（）方法。我做了几次同样的事情，没关系。但是，这次价值误差提升了。

我的课程：

 class Article(models.Model):
    title = models.CharField(max_length=500)
    body = models.TextField(max_length=50000)
    url = models.CharField(max_length=500, null=True)

    def save(self, *args, **kwargs):
        self.url = self.title
        self.url.lower()
        self.url.replace(' ', '_')
        super(Article, self).save(*args, **kwargs)

错误日志：

    >>> a = Article("Title 1", "text")
    >>> a.save()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/user/django/project/apps/articles/models.py", line 19, in save
    super(Article, self).save(*args, **kwargs)
  File "/home/user/.virtualenvs/dj18/local/lib/python2.7/site-packages/django/db/models/base.py", line 710, in save
    force_update=force_update, update_fields=update_fields)
  ...

  File "/home/user/.virtualenvs/dj18/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py", line 985, in get_prep_value
    return int(value)
ValueError: invalid literal for int() with base 10: 'Title 1'

Answer 1

您创建的对象不是推荐的方法。将值指定为

时，您必须为specifiying the parameter names

a = Article(title  = "Title 1",  body = "text")
a.save()

这里我已经指定新对象的标题必须设置为Title 1，

并且body将设置为text

Django模型save（）方法覆盖导致ValueError

1 个答案: