Using migration methods in applications.

Is it possible to use methods for migration(create_table, add_column,
etc) in applications.

I want to make a plugin which uses its own model. In such cases, most
plugins seem to use script/generate to generate migration file. But I
think if it is possible to make tables directly from plugins, uses
doesn't have to use script/generate or rake. It'll be easier to use.
But I couldn't find how to do it.

Any help appreciated.

Andy Matsubara

I found the answer by myself.