运行django报错：You have unapplied migrations; your app may not work properly until they are applied
报错如下
Performing system checks...
System check identified no issues (0 silenced).
You have unapplied migrations; your app may not work properly until they are applied.
Run 'python manage.py migrate' to apply them.
April 03, 2019 - 08:52:46
Django version 1.8.3, using settings 'DjangoWeb.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.
解决：已经有提示让运行（它可以让我们在修改Model后可以在不影响现有数据的前提下重建表结构）
python manage.py migrate