Django:TypeError: __init__() missing 1 required positional argument: 'on_delete' - 代码天地

Django:TypeError: init() missing 1 required positional argument: 'on_delete'

其他 2018-10-06 09:20:27 阅读次数: 0

问题：
TypeError: init() missing 1 required positional argument: ‘on_delete’

原因：
在Django 2.0以后的版本中，需要在引用外键时在括号内加入on_delete=models，以此产生联级作用，避免两个表内数据因发生变化而不同步导致异常。

 hbook=models.ForeignKey(BookInfo, on_delete=models.CASCADE)

其中CASCADE是连级删除的意思

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转载自blog.csdn.net/xiaoyaosheng19/article/details/82696457

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

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

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django迁移数据库时报错，TypeError: __init__() missing 1 required positional argument: 'on_delete'

Django 报错TypeError: init() missing 1 required positional argument: ‘on_delete’

Django在根据models生成数据库表时报 __init__() missing 1 required positional argument: 'on_delete' Django在根据models生成数据库表时报 __init__() missing 1 required positional argument: 'on_delete'

Django在根据models生成数据库表时报 __init__() missing 1 required positional argument: 'on_delete'

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