如何在 celery 异步 task 执行中拿到里面的返回值 - V2EX
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u2gign

如何在 celery 异步 task 执行中拿到里面的返回值

  •  
  •   u2gign Jul 14, 2022 3009 views
    This topic created in 1399 days ago, the information mentioned may be changed or developed.

    各位彦祖,想在页面实时显示当前执行程序的日志,所以需要在运行程序时就获取到数据库这条记录的 id ,但执行的是 celery 异步 task ,没办法直接拿到 id ,只能等异步完成后才能拿到,这个如何解决。 (插库操作不能放到异步程序外,因为还有很多参数是在这里获取的)求彦祖能给个解决方案

     @shared_task(base=mytask,bind=True) def data_run(self,caseList,project,env,username,type=None,ids=None): . . . #插库记录 run_record = runRecord.objects.create(user_name=username, casepath=caselists[1], env=env,uuid=task_id, cases=','.join(caselists[0]), project=project,status=1, type=0, vaild=1, report=report, log=LOG_FILE_PATH) #获取这条库记录 id id = model_to_dict(run_record)['id'] #执行程序 sk = runner.run(caseList=caseList,report=report,project=project,env=env,refail=refail) 
    7 replies    2022-07-14 14:07:33 +08:00
    filwaline
        1
    filwaline  
       Jul 14, 2022   1
    如果只需要 id 的话,那就任务执行之前预分配个自定义 id 呗,然后作为参数传递给 task 。

    强行 hack 一个 task 纯粹自找麻烦。
    hanssx
        2
    hanssx  
       Jul 14, 2022   1
    插库操作返回的 id ,估计只能写到 redis 之类里面作媒介,定时去读了。
    imycc
        3
    imycc  
       Jul 14, 2022   1
    /div>
    如果希望调用这个 task 的一方尽早地拿到 ID ,我的做法是在调用 task 之前,先创建一条初始化的记录,用个字段 state=init 表示,那些不确定的字段就赋一个初始值,然后把 id 作为参数传给 task 。
    task 执行的时候,从数据库用 id 把指定记录捞出来,把状态改为 pending/running ,等执行结束再改个状态
    u2gign
        4
    u2gign  
    OP
       Jul 14, 2022
    @imycc 好主意,谢谢哈
    cz5424
        5
    cz5424  
       Jul 14, 2022   2
    xxxxx.apply_async(task_id=xxxxx)
    zoofy
        6
    zoofy  
       Jul 14, 2022
    看代码感觉是用 django, 可以看下 django-celery-results
    37Y37
        7
    37Y37  
       Jul 14, 2022   1
    这个我写过,channels 做 websocket ,celery 异步读取丢给 channels https://blog.ops-coffee.cn/s/r5spytjrl0jjeauye4q_-q
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