On Mon, Feb 11, 2008 at 08:37:11AM -0700, Jamis Buck wrote:
> On Feb 11, 2008, at 8:01 AM, Gregory Seidman wrote:
>
>> On a related note, what support is there for rolling back not just a 
>> deploy
>> but migrations as well? Let's call the currently deployed version A and 
>> the
>> older version we're rolling back to B. If I want to rollback to B I need 
>> to
>> figure out what migration version B wants, migrate the DB to that version
>> before changing the symlink to point to B, then change the symlink. Is 
>> that
>> supported?
>
> There is no built-in support for rolling back a migration, because not 
> every migration is reversible, and the only general solution would be to do 
> a backup of your database before running the migration.
>
> You're pretty much on your own if you want to be able to rollback to a 
> pre-migration version of your app.

Well, I think that functionality will make some people here more
comfortable/happier, so I'll go about implementing it. When I get it
working I'll post it here. I'll presumably be using a before hook for
deploy:rollback, or even overriding deploy:rollback. I need the path (like
current_path) for the version I'm rolling back to, though, and I'm not sure
how to get that. Is it already set somewhere?

> - Jamis
--Greg


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