Question

我想在django为我的学校创建一个善良的社交网络。我的问题是我创建了一个跟随函数，django给了我一个错误响应。我该怎么处理？

django代码：

class User(User):
    joined = models.DateTimeField(auto_now_add=True)
    is_activated = models.BooleanField(default=False)

    def __unicode__(self):
        return self.username


class Following_User(models.Model):
    user_id = models.ForeignKey(User)
    user_follow = models.ForeignKey(User)

并且是错误响应：

ERRORS:

cherry.Following_User.user_follow: (fields.E304) Reverse accessor for 'Following_User.user_follow' clashes with reverse accessor for 'Following_User.user_id'.
HINT: Add or change a related_name argument to the definition for 'Following_User.user_follow' or 'Following_User.user_id'.
cherry.Following_User.user_id: (fields.E304) Reverse accessor for 'Following_User.user_id' clashes with reverse accessor for 'Following_User.user_follow'.
HINT: Add or change a related_name argument to the definition for 'Following_User.user_id' or 'Following_User.user_follow'.

System check identified 2 issues (0 silenced).

Answer 1

如果您的模型包含两个字段作为另一个模型的外键，则需要为每个字段指定related_name。

class Following_User(models.Model):
    user_id = models.ForeignKey(User, related_name="following_user_id")
    user_follow = models.ForeignKey(User, related_name="following_user_follow")

https://docs.djangoproject.com/en/1.8/ref/models/fields/#django.db.models.ForeignKey.related_name

拥有related_name的原因是，如果要从外键查询，django会给你反向关系。对于与当前模型有关系的单个字段，django会为您提供一个默认值blahfield_set，但在这种情况下，related_name将用于消除歧义。

Follow功能有问题

1 个答案: