8 Make changes to Django Models with South

安装south

pip install south

INSTALLED_APPS = (
    'joins',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    # Uncomment the next line to enable the admin:
    'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    'django.contrib.admindocs',
    'south'
)

用south来控制joins的migration

python manage.py convert_to_south joins

这条命令会创建history和初始的migration

本地运行时，之前已有joins数据库，一个简单方法是直接删除joins/migrations,然后执行sync，将会从头执行

python manage.py syncdb

将会创建表 south_migrationhistory, joins_join

执行修改

python manage.py schemamigration joins –auto

migrate db

python manage.py migrate joins

https://github.com/codingforentrepreneurs/Guides/blob/master/all/using_south_in_django.md

1) Install south : pip install south, add south to settings.py in INSTALLED APPS
2) Ensure model is in sync in database
3) Covert the model to south with : python manage.py convert_to_south appname
4) Make changes to model (eg add new fields : ip_address = model.CharField(max_length=120
5) Run schemamigration : python manage.py schemamigration appname --auto
6) Run migrate : python mange.py migrate