django2以后的版本Foreignkey的变动

class User(AbstractUser):
    """用户表"""
    job = models.ManyToManyField(to='job.Job', through='Collect', through_fields=('user', 'job'))

class Job(BaseModel):
    """岗位表"""
    user = models.ManyToManyField(to='user.User', through='user.Collect', through_fields=('job', 'user'))

class Collect(models.Model):
    """收藏表"""
    user = models.ForeignKey('User', to_field='id', on_delete=models.CASCADE)
    job = models.ForeignKey("job.Job",to_field='id',on_delete=models.CASCADE)

django2版本以后foreignkey必须加on_delete参数

django2以后的版本Foreignkey的变动

原文：https://www.cnblogs.com/demiao/p/12061594.html