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Python manage.py migrate 时。总时出现这个 warnings 是什么意思？
python30 · 2018-04-27 20:36:55 +08:00 · 5121 次点击这是一个创建于 2420 天前的主题，其中的信息可能已经有所发展或是发生改变。
C:\Users\MrTong\Desktop\django\EasyCRM>Python manage.py migrate
System check identified some issues:
WARNINGS:
crm.Customer.tags: (fields.W340) null has no effect on ManyToManyField.
crm.UserProfile.roles: (fields.W340) null has no effect on ManyToManyField.
System check identified some issues:
WARNINGS:
crm.Customer.tags: (fields.W340) null has no effect on ManyToManyField.
crm.UserProfile.roles: (fields.W340) null has no effect on ManyToManyField.
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1
georgema1982 2018-04-28 02:23:06 +08:00
你在 ManyToManyField 上有个 null 的参数。migration 提醒你 null 在 ManyToManyField 上无效
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2
python30 OP 多谢。
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