Do I need to call syncdb before or after South migrate

I'm new to South so I am wondering if I ever need to call

./ma开发者_Python百科nage.py syncdb

or doing

./manage.py schemamigration appname --auto
./manage.py migrate appname

is sufficient in all cases South can handle on its own.

South isn't project wide. It is app wide.
Some apps use south, some apps don't use it.

if an app is integrated south, to do db changes you will use

./manage.py schemamigration appname --auto
./manage.py migrate appname

but not all apps are integrated with south.

When you add a new app that don't use south to your project, you need to call ./manage.py syncdb for these apps. (For example, django.contrib apps)

In short, use ./manage.py syncdb when an app doesn't use south, and ./manage.py migrate for south integrated apps.

When you create or install a new app MyApp, you should first execute the following commands:

./manage.py schemamigration MyApp --inital
./manage.py migrate MyApp

After that whenever you execute ./manage.py syncdb you will see:

Syncing...
Creating tables ...
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)

Synced:
 > south
 > django.contrib.auth
 > django.contrib.contenttypes
 > django.contrib.sessions
 > django.contrib.sites
 > django.contrib.messages
 > django.contrib.staticfiles
 > django.contrib.admin
 > django.contrib.admindocs

Not synced (use migrations):
 - MyApp
(use ./manage.py migrate to migrate these)

You can see that manage.py syncdb is able to differentiate between apps managed by South (Not synced section) and those not managed by South (Synced section). It also reminds you to use ./manage.py migrate.

The important point is to let South manage a new app by executing ./manage.py schemamigration MyApp --inital and ./manage.py migrate MyApp before executing ./manage.py syncdb.