Django —— ORM定义外键报错:TypeError: __init__() missing 1 required positional argument: 'on_delete'
在Django项目中,使用ORM在models.py中新建数据表定义外键的时候语句如下:
publisher_id = models.ForeignKey(to="Publisher")
报错信息为:
TypeError: __init__() missing 1 required positional argument: 'on_delete'
解决方案:
在ForeignKey中添加语句
publisher_id = models.ForeignKey(to="Publisher", on_delete=models.CASCADE)