运行后的问题：heroku run python manage.py migrate答案

【问题标题】：Problems after run: heroku run python manage.py migrate运行后的问题：heroku run python manage.py migrate
【发布时间】：2021-02-16 15:32:48
【问题描述】：

当我在 heroku 中部署我的 django 应用程序时，我运行：

  heroku run python3  manage.py migrate

我在控制台中得到了这个消息：

  File "manage.py", line 16
  ) from exc
     ^
  SyntaxError: invalid syntax

我的 manage.py 文件实际上是：

  #!~/.virtualenvs/djangodev/bin/python
  """Django's command-line utility for administrative tasks."""
  import os
  import sys


  def main():
      os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myApp3.settings')
      try:
          from django.core.management import execute_from_command_line
      except ImportError as exc:
          raise ImportError(
              "Couldn't import Django. Are you sure it's installed and "
              "available on your PYTHONPATH environment variable? Did you "
              "forget to activate a virtual environment?"
          ) from exc
      execute_from_command_line(sys.argv)

  if __name__ == '__main__':
      main()

当我运行 python => python3 时，显示下一条消息：

  Traceback (most recent call last):
    File "manage.py", line 10, in main
      from django.core.management import execute_from_command_line
  ModuleNotFoundError: No module named 'django'

  The above exception was the direct cause of the following exception:

  Traceback (most recent call last):
    File "manage.py", line 21, in <module>
      main()
    File "manage.py", line 16, in main
      ) from exc
  ImportError: Couldn't import Django. Are you sure it's installed and available       on your PYTHONPATH environment variable? Did you forget to activate a virtual       environment?

【问题讨论】：

标签： python django heroku migrate

【解决方案1】：

您需要先设置一个虚拟环境。然后在虚拟环境中安装django。你可以通过一个叫做pipenv的东西来做到这一点。您需要通过这样做将其添加到您的项目中。 python install pipenv。然后通过pipenv install django 在该虚拟环境中安装python。安装 django 后，您就可以进行迁移了。

【讨论】：

其实我先有我的虚拟环境。