Migrations

# 生成一个空的迁移文件
python manage.py makemigrations --empty --name create_superadmin users

# 检测 users 的模型定义是否改变了并自动生成迁移文件
python manage.py makemigrations users

# 应用迁移文件
python manage.py migrate users

# 撤销迁移
python manage.py showmigrations users
    users
    [X] 0001_initial
    [X] 0002_create_superadmin

python manage.py migrate users 0001_initial
    Operations to perform:
    Target specific migration: 0001_initial, from users
    Running migrations:
    Rendering model states... DONE
    Unapplying users.0002_create_superadmin... OK

python manage.py migrate users zero # undo all migrations

# 撤销并重置
python manage.py migrate users latest.py
rm migrations/latest.py
python manage.py makemigriaons users
python manage.py migrate users