django models层外键报错TypeError: __init__() missing 1 required positional argument: 'on_delete'
1.解决方法，添加参数：on_delete=models.CASCADEmodel 例如topic = models.ForeignKey(Topic,on_delete=models.CASCADE) 方法
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- 1. Django —— ORM定义外键报错：TypeError: __init__() missing 1 required positional argument: 'on_delete'
- 2. Django报错 __init__() missing 1 required positional argument 'on_delete'
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- 4. 解决--TypeError: __init__() missing 1 required positional argument: 'on_delete'
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