更新＃1

Question

我有一个奇怪的错误，因为我们从Django 1.11.5升级到Django 2.1.3（python 3.5.2）。我们使用MySQL 5.7.24。安装的最新软件包是：

django-mysql == 2.4.1
mysqlclient == 1.3.14

我们还使用芹菜：

celery == 4.2.1
django-celery-beat == 1.3.0
django-celery-results == 1.0.4

该错误仅在我们执行芹菜任务（perform_display_ads_check）时发生。如果我们在不使用.delay()的情况下运行函数，它将起作用。

以下是此任务的代码：

@shared_task
def perform_display_ads_check():
    try:
        checker = DisplayAdsCheck()
        checker.check_all()
    except Exception as e:
        logger.exception(str(e))
        message = 'Cannot check display ads. Reason: {}'.format(str(e))
        send_slack_message.delay(message=message)
        raise Reject(requeue=False)

send_slack_message.delay(message=message)有效。此数据库不涉及任何数据库。

这是日志：

    [2018-12-05 09:51:47,626: WARNING/ForkPoolWorker-1] Task clients.tasks.display_ads_check.perform_display_ads_check[535c8b34-5cf4-48e0-a16d-a22b5979f38b] reject requeue=False: None
Traceback (most recent call last):
  File "/home/tool/www/project/clients/tasks/display_ads_check.py", line 26, in perform_display_ads_check
    checker.check_all()
  File "/home/tool/www/project/clients/tasks/display_ads_check.py", line 38, in check_all
    clients = self.process()
  File "/home/tool/www/project/clients/tasks/display_ads_check.py", line 81, in process
    for client in clients_qs.iterator():
  File "/home/tool/.virtualenvs/tool_py3/local/lib/python3.5/dist-packages/django/db/models/query.py", line 50, in __iter__
  File "/home/tool/.virtualenvs/tool_py3/local/lib/python3.5/dist-packages/django/db/models/sql/query.py", line 256, in get_compiler
  File "/home/tool/.virtualenvs/tool_py3/local/lib/python3.5/dist-packages/django/db/backends/base/operations.py", line 316, in compiler
  File "/home/tool/.virtualenvs/tool_py3/lib64/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 985, in _gcd_import
  File "<frozen importlib._bootstrap>", line 968, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
ImportError: No module named 'django.db.backends.mysql.compiler'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/tool/.virtualenvs/tool_py3/local/lib/python3.5/dist-packages/celery/app/trace.py", line 382, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/home/tool/.virtualenvs/tool_py3/local/lib/python3.5/dist-packages/celery/app/trace.py", line 641, in __protected_call__
    return self.run(*args, **kwargs)
  File "/home/tool/www/project/clients/tasks/display_ads_check.py", line 31, in perform_display_ads_check
    raise Reject(requeue=False)
celery.exceptions.Reject: (None, False)

您有什么线索吗？有小费吗？请告知。

更新＃1

我们注意到，它在dist-packages中查找文件，但是其中没有Django软件包。 Django在site-packages中。

更新＃2

我们终于找到了问题所在。解决方案是重新创建虚拟环境。

Answer 1

已解决！

我们终于找到了问题所在。解决方案是重新创建虚拟环境。

没有名为“ django.db.backends.mysql.compiler”的模块

更新＃1

更新＃2

1 个答案:

已解决！