django关联外键

使用django进行关联外键

1. 当两个属性关联一个外键的时候，需要添加一个related_name字段,

from django.contrib.auth.models import AbstractUser
class User(AbstractUser):
    phone = models.CharField(verbose_name='手机号',max_length=11)
    fengsi = models.ForeignKey(to='self',null=True,blank=True,on_delete=models.CASCADE,related_name='粉丝')
    guanzhu = models.ForeignKey(to='self',null=True,blank=True,on_delete=models.CASCADE,related_name='关注')

    class Meta:
        verbose_name = '用户'
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.username

2. 如果没有添加related_name就会报这个错

app01d.User.guanzhu: (fields.E304) Reverse accessor for 'User.guanzhu' *es with reverse accessor for 'User.fengsi'.
        HINT: Add or change a related_name argument to the definition for 'User.guanzhu' or 'User.fengsi'.