pythoncharm 中解决启动server时出现 “django.core.exceptions.ImproperlyConfigured: Requested setting DEBUG, but settings are not configured”的错误

背景介绍

最近，尝试着用pythoncharm 这个All-star IDE来搞一搞Django，于是乎，下载专业版，PJ等等一系列操作之后，终于得偿所愿。可以开工了。

错误

在园子里找了一篇初学者的教程，按照教程上面的指导，一步一步往下走，一路上都很顺利。但是到了启动django server的时候出现了意外。

错误信息如下：

/home/ct/PycharmProjects/mysite/venv/bin/python /home/ct/PycharmProjects/mysite/manage.py runserver 127.0.0.1:8000
Traceback (most recent call last):
  File "/home/ct/PycharmProjects/mysite/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 61, in execute
    super(Command, self).execute(*args, **options)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 72, in handle
    if not settings.DEBUG and not settings.ALLOWED_HOSTS:
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 56, in __getattr__
    self._setup(name)
  File "/home/ct/PycharmProjects/mysite/venv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 39, in _setup
    % (desc, ENVIRONMENT_VARIABLE))

django.core.exceptions.ImproperlyConfigured: Requested setting DEBUG, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

Process finished with exit code 1

分析原因

最初，分析原因猜测是Django的安装出了问题；但是，使用 terminal来启动django, 一切正常啊。

ct@ubuntu:~/PycharmProjects/mysite$ python manage.py runserver 127.0.0.1:8000
Performing system checks...

System check identified no issues (0 silenced).

You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.

April 05, 2018 - 13:53:41
Django version 1.11, using settings 'mysite.settings'


Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

思考了以后，感觉还是 pythoncharm 里，关于django的设置出了问题。于是打开IDE中的配置，发现缺失了 “DJANGO_SETTINGS_MODULE” 的配置

解决方法

顺着这个思路，一直找解决方案，终于找到了如何设置django项目的配置。

export DJANGO_SETTINGS_MODULE=mysite.settings

其实也就是添加环境变量罢了，只不过在pythoncharm中，我们需要将环境变量添加到IDE里面。。。

点击OK后，再次在pythoncharm里运行项目，这次成功啦！！

参考资料：

https://stackoverflow.com/questions/26082128/improperlyconfigured-you-must-either-define-the-environment-variable-django-set

记录一下加深记忆的同时也希望能帮到其他人！！感谢大家的收看， bye~~