在迁移Django / South上设置默认值？

Question

Is Django 1.6 with South 0.8 going to set default value when I add a column with default value to existing data having the field described like this?

gametype = models.PositiveSmallIntegerField(_('type of game'), 
                                            choices=CONST_TYPES, 
                                            default=CONST_TYPE_NORMAL, 
                                            null=True, blank=True)

I am worrying about having null=True at the same time with default specified

Answer 1

It depends on whether gametype is a new field or not.

1. If the gametype field is a new field, the migration will add that field to every model instance and use the default value.
2. However, if the gametype field already existed and there are values in the database already, South shouldn't mess with them, even if they're NULL.