How to generate migration files using schema.rb

Question

Suppose I have a Big and Ugly schema.rb, and no migrations, what is the best way of creating them, besides doing this with ctr+c/crt+v. Plus I need them to be considered as allready migrated :). Consider that this need to be generated in rails 2.3.5 env :(.

Answer 1

生成一个迁移，然后将schema.rb代码（不带ActiveRecord::Schema.define(:version => x) do和end ）复制到up或change方法中。

Answer 2

The only option you have is to generate the database from your schema.rb file using the command rake db:schema:load . Just be careful as rake db:schema:load will delete data on your production server.

If you look at the schema.rb file you will notice it only has the timestamp of the last migration, which is the version of the schema, and the commands required to replicate it. You can create a single migration from it, and make all the future changes from there.