class CreateUuidPsqlExtension < ActiveRecord::Migration
 def self.up
  execute "CREATE EXTENSION "uuid-ossp";"
 end
 
 def self.down
  execute "DROP EXTENSION "uuid-ossp";"
 end
end

create_table :translations, id: :uuid do |t|
 t.string :title
 t.timestamps
end

class AddUuidToModelsThatNeedIt < ActiveRecord::Migration
 def up
  add_column :translations, :uuid, :uuid
 end
 
 def down
  remove_column :invoices, :uuid
 end
end

class AddUuidToModelsThatNeedIt < ActiveRecord::Migration
 def up
  add_column :translations, :uuid, :uuid, :default => "uuid_generate_v4()"
 end
 
 def down
  remove_column :invoices, :uuid
 end
end