TypeError: __init__() missing 1 required positional argument: 'on_delete'

class HeroInfo(models.Model):
    # 英雄名
    hname = models.CharField(max_length=20)
    # 性别
    hgender = models.BooleanField(default=False)
    # 备注
    hcomment = models.CharField(max_length=200)
    # 外键
    hbook = models.ForeignKey('BookInfo')
    # 删除标记
    isDelete = models.BooleanField(default=False)

创建迁移文件时报错：

报错环境 python=3.6，django=2.2，PyMySQL=0.9.3

TypeError: __init__() missing 1 required positional argument: 'on_delete'

原因：

django2.0之后定义外键时需指定'on_delete'参数值。

详见django官方文档：https://docs.djangoproject.com/en/2.0/ref/models/fields/#django.db.models.ForeignKey

标签：__,TypeError,missing,models,ForeignKey,argument,django,delete
来源： https://www.cnblogs.com/AngelLoveRZZZ/p/10858942.html