django-crontab定时任务无法自动执行，求排查问题原因

环境与配置说明 #

我有一个Django项目，包含名为app的应用，该应用下有cron.py文件，里面定义了my_job()函数，希望它每分钟执行一次。

settings.py配置（路径：django-project/django-project/settings.py） #

INSTALLED_APPS = [
    'django_crontab',
    ...
]

...

CRONJOBS = [
    ('*/5 * * * *', 'app.cron.my_job')
]

cron.py内容（路径：django-project/app/cron.py） #

from .models import TestModel

def my_job():
    TestModel.objects.create(number=100)
    return True

已执行的操作 #

• 执行命令：python3 manage.py crontab add，终端输出：

adding cronjob: (62dd7536ac2c985925ee33743a070a4c) -> ('*/5 * * * *', 'app.cron.my_job')

• 执行命令：python3 manage.py crontab show，终端显示：

Project/ccc_nema -> ('*/5 * * * *', 'app.cron.my_job')

• 尝试手动执行任务时，输入python3 manage.py crontab run someHash，报错：

Traceback (most recent call last):
  File "/home/anik/Workplace/Office Project/ccc_nema v2/core/manage.py", line 22, in <module>
    main()
  File "/home/anik/Workplace/Office Project/ccc_nema v2/core/manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django/core/management/__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django/core/management/base.py", line 402, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django/core/management/base.py", line 448, in execute
    output = self.handle(*args, **options)
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django_crontab/management/commands/crontab.py", line 29, in handle
    Crontab().run_job(options['jobhash'])
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django_crontab/crontab.py", line 126, in run_job
    job = self.__get_job_by_hash(job_hash)
  File "/home/anik/Workplace/Office Project/ccc_nema v2/env_python/lib/python3.10/site-packages/django_crontab/crontab.py", line 171, in __get_job_by_hash
    raise RuntimeError(
RuntimeError: No job with hash someHash found. It seems the crontab is out of sync with your settings.CRONJOBS. Run "python manage.py crontab add" again to resolve this issue!

核心问题 #

无论等待多久，定时任务都无法自动执行，请问我哪里操作出错了？

内容的提问来源于stack exchange，提问作者Anik Saha