Django ORM 如何才能在 save_model 插入数据库完成后,再次更新数据库? - V2EX
colatea

Django ORM 如何才能在 save_model 插入数据库完成后,再次更新数据库?

  •  
  •   colatea May 26, 2022 2834 views
    This topic created in 1448 days ago, the information mentioned may be changed or developed.
    我需要在一条记录完成插入数据库后,调用 os.system 执行其他的命令,而此命令中有对这条记录的 update 操作,目前无论是重写 save_model,model.save,侦听 post_save.connect 信号,都会报死锁 Lock wait timeout exceeded; try restarting transaction

    请各位大神指点
    Supplement 1    May 26, 2022
    忘记说了
    这是在 admin 里的操作
    6 replies    2022-05-26 20:04:59 +08:00
    fuxinya
        1
    fuxinya  
       May 26, 2022 via Android
    说明你开了两个事务,请在一个事务中操作
    colatea
        2
    colatea  
    OP
       May 26, 2022
    @fuxinya

    def save_model(self, request, obj, form, change):
    super().save_model(request, obj, form, change)
    os.system("XXXXXX")

    请问 os.system("XXXXXX")怎么能加到 orm 的事务里?或者怎么知道原来的事务结束了?post_save 信号不灵啊
    colatea
        3
    colatea  
    OP
       May 26, 2022
    哦,忘记说了,这是在 admin 里的操作
    RadishWind
        4
    RadishWind  
       May 26, 2022
    @colatea 从逻辑上的解耦做吧, 其实不太建议这种操作 比如把 os 的操作改成异步的
    westoy
        5
    westoy  
       May 26, 2022
    os.system('nohup xxxx &')
    colatea
        6
    colatea  
    OP
       May 26, 2022
    @westoy 搞定了!!大神!!!!!!!!!!!我佩服的五体投地,我最佩服你这用简单的办法就能搞定难题的人
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