ou are trying to add a non-nullable field 'address' to person without a default; we can't do that (the database needs something to populate existing rows).

You are trying to add a non-nullable field 'address' to person without a default; we can't do that (the database needs something to populate existing rows).

Please select a fix:

1. Provide a one-off default now (will be set on all existing rows with a null value for this column) 提供一次性默认值

2. Quit, and let me add a default in models.py 退出，在模型里添加默认值。（推荐)

Select an option:

问题是：

　　在第一次初始化model之后，新添加了addres字段，这个字段没有默认值，所以他建议你给一个默认值；