运行python manage.py runserver时报错：You have 18 unapplied migration(s). Your project may not work proper

运行python manage.py runserver时报错：You have 18 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.

实际上Django是把用户表，组表等的模式都写好了，项目实施时，需要先将这些模式导入到数据库中。因此，此时应该先在终端Terminal执行迁移。

python manage.py makemigrations#生成迁移文件
python manage.py migrate#执行迁移文件

然后再执行python manage.py runserver 成功