错误：Signal handler <bound method DjangoWorkerFixup.on_task_postrun of <celery.fixups.django.DjangoWorkerFixup object at 0x000002C9D2762940>> raised: 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 3065822880656 and this is thread id 3065869679472.")
解决办法：如果你的django版本为3 x 就把他降低2.x的版本