Updating rails 2.3 plugins database

As I discovered on github https://github.com/rails/rails/issues/5424

rails engines migrations should be checked into source control.

But I don’t see how it’s possible to upgrade database with rails 2.3 plugins migrations to rails 3 engines migrations. (duplicate table and column names, etc.)

Do you have any thoughts?

Please specify which plugin have you used for engines migrations in 2.3 or describe your situation better - how does your migration files look like?

I use this plugin

https://github.com/lazyatom/engines
which I think is now integrated into Rails 3. Or is it?

My migration files are in vendor/plugins/my_plugins/db/migrate/0xx_migration_name.rb

When I run install migrations task, they are copied to db/migrate/2100000xx_migration_name.rb

And when I run db:migrate I end up with migration errors

I use this plugin

https://github.com/lazyatom/engines
which I think is now integrated into Rails 3. Or is it?

When we were working on engines we were taking a look at existing solutions, but we didn’t aim at porting any existing plugins 1 to 1. There were also other approaches.

My migration files are in vendor/plugins/my_plugins/db/migrate/0xx_migration_name.rb

When I run install migrations task, they are copied to db/migrate/2100000xx_migration_name.rb

And when I run db:migrate I end up with migration errors

What you could do is to copy those migrations by hand without changing timestamps. Rewriting timestamps is important only if you need to depend on previous migrations and since you were not using such mechanisms, you should be fine with that. After copying migrations to your app they should be skipped on next migrations:install task.