Django执行命令python manage.py runserver，提示“You have unapplied migrations; your app may not work properly until they are applied.
Run 'python manage.py migrate' to apply them.”的解决方法，码笔记分享：
python manage.py runserver错误及解决方法
执行命令：python manage.py runserver
报错：“You have unapplied migrations; your app may not work properly until they are applied.
Run 'python manage.py migrate' to apply them.”
解决方法
报错信息已经说的很清楚了，让我们“Run 'python manage.py migrate' to apply them.”，运行python manage.py migrate命令即可。那么这个命令中的migrate是什么？它能够让我们在修改Model后可以在不影响现有数据的前提下重建表结构。
示例：
[root@mabiji HelloDjango]# python manage.py runserver 0.0.0.0:80
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.
January 21, 2019 - 13:57:40
Django version 1.8.9, using settings 'HelloDjango.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.
^Z
[1]+ 已停止 python manage.py runserver 0.0.0.0:8000
[root@mabiji HelloDjango]# python manage.py migrate
Operations to perform:
Synchronize unmigrated apps: staticfiles, messages
Apply all migrations: admin, contenttypes, auth, sessions
Synchronizing apps without migrations:
Creating tables...
Running deferred SQL...
Installing custom SQL...
Running migrations:
Rendering model states... DONE
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying contenttypes.0002_remove_content_type_name... OK
Applying auth.0002_alter_permission_name_max_length... OK
Applying auth.0003_alter_user_email_max_length... OK
Applying auth.0004_alter_user_username_opts... OK
Applying auth.0005_alter_user_last_login_null... OK
Applying auth.0006_require_contenttypes_0002... OK
Applying sessions.0001_initial... OK
执行命令python manage.py migrate后，你会发现，在你的Django目录下面多了一个dg.sqlite3文件。
然后再重新执行命令python manage.py runserver即可搞定。
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