python3 manage.py runserver
1、django_migrations
delete from django_migrations where app like 'order'
2、先执行 makemigrations,创建python生成表的函数
python3 manage.py makemigrations order
3、 再执行 migrate,运行sql创建语句
python3 manage.py migrate order
python3 manage.py createsuperuser
python3 manage.py startapp