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python30
V2EX  ›  Python

Python manage.py migrate 时。总时出现这个 warnings 是什么意思？

  •   
  •   python30 · Apr 27, 2018 · 5754 views
    This topic created in 3073 days ago, the information mentioned may be changed or developed.
    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.
  • migrate
  • null
  • warnings
  • Python
    2 replies  •  2018-04-30 13:49:47 +08:00
    georgema1982
        1
    georgema1982  
       Apr 28, 2018
    你在 ManyToManyField 上有个 null 的参数。migration 提醒你 null 在 ManyToManyField 上无效
    python30
        2
    python30  
    OP
       Apr 30, 2018
    多谢。
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