Django+celery开启时报错-Toy模板网

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django.db.utils.DatabaseError: DatabaseWrapper objects created in a thread can only be used in that same thread. The object with alias 'default' was created in thread id 19767205568
00 and this is thread id 1976775359680.

问题：

执行celery worker -A s1 -l info -P eventlet能正常，放立即执行的任务(delay)没有问题，不过放apply_async的任务时就会报上面的错误。

网上都说是版本的问题，我的版本是

celery                  4.4.0
Django                  4.2.1
django-redis            5.2.0
eventlet                0.33.3
redis                   4.5.4

解决办法：

由于-P eventlet是多线程任务的，改成单线程任务，用参数--pool=solo代替-P eventlet。

还需要把python3.9换成python3.8才可以，否则还会报其它错。

当前包的版本信息如下：

celery                  4.4.0
Django                  4.2.2
django-redis            5.3.0
eventlet                0.33.3
redis                   4.5.4

执行这个就正常了文章来源地址https://www.toymoban.com/news/detail-513578.html

celery worker -A djangoTest -l info  --pool=solo

(venv38) D:\PYProject\djangoTest>celery worker -A djangoTest -l info  --pool=solo

 -------------- celery@QHT81 v4.4.0 (cliffs)
--- ***** -----
-- ******* ---- Windows-10-10.0.18362-SP0 2023-06-28 11:20:33
- *** --- * ---
- ** ---------- [config]
- ** ---------- .> app:         demos:0x1d462de8850
- ** ---------- .> transport:   redis://127.0.0.1:6379//
- ** ---------- .> results:     redis://127.0.0.1:6379/
- *** --- * --- .> concurrency: 12 (solo)
-- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
--- ***** -----
 -------------- [queues]
                .> celery           exchange=celery(direct) key=celery


[tasks]
  . api.tasks.s1
  . api.tasks.s2

[2023-06-28 11:20:33,940: INFO/MainProcess] Connected to redis://127.0.0.1:6379//
[2023-06-28 11:20:33,946: INFO/MainProcess] mingle: searching for neighbors
[2023-06-28 11:20:34,959: INFO/MainProcess] mingle: all alone
[2023-06-28 11:20:34,965: INFO/MainProcess] celery@QHT81 ready.
[2023-06-28 11:20:38,046: INFO/MainProcess] Received task: api.tasks.s1[7b925061-eab0-4e5a-81fe-2710b5809d64]  ETA:[2023-06-28 03:20:48.044882+00:00]
[2023-06-28 11:20:48,056: INFO/MainProcess] Task api.tasks.s1[7b925061-eab0-4e5a-81fe-2710b5809d64] succeeded in 0.0s: 9
[2023-06-28 11:21:02,920: INFO/MainProcess] Received task: api.tasks.s1[e1cbafef-ef65-4ade-b139-d4af31500da5]  ETA:[2023-06-28 03:21:12.918404+00:00]
[2023-06-28 11:21:12,930: INFO/MainProcess] Task api.tasks.s1[e1cbafef-ef65-4ade-b139-d4af31500da5] succeeded in 0.0s: 9

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