Re: Migrating existing auth.User users to Django 1.5 Custom User table

On Mon, Feb 18, 2013 at 4:33 PM, Ben Roberts <ben@nutrislice.com> wrote:
> I assume, when Django 1.5 hits the public in 2014 >;) that many will want to
> take advantage of some facet of the new pluggable User models. You may,
> like me, want to add an additional column (field) or two in your custom
> User.
>
> E.g.:
>
> class SiteUser(AbstractUser):
> site = models.ForeignKey(Site, null=True)
>
>
> However, you have an exiting table of users and need to migrate them to your
> new model/table. How? My current challenge is that I don't see any clear,
> scriptable way to do this, whether it be through South, SQL, or
> dumpdata/loaddata.
>
> Have an answer that's more than just a fleeting suggestion? Feel free to
> grab the bounty on the Stack Overflow question if your answer works, or
> respond here if SO isn't your thing.
>

South migrations do not have to be automatically generated, there is a
rich API for making schema altering migrations:

http://south.readthedocs.org/en/latest/databaseapi.html#db-rename-table

Therefore, it simply comes down to what steps are required. Something
like this should suffice:

Add 'custom' user model that has exactly the same fields as the
current user model.
Add a schema migration to rename auth_user to the new required table name
Run your migration
Modify the user model as you see fit
Generate schema migrations as per any other model

Cheers

Tom

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