class ModifyTextTypes < ActiveRecord::Migration def self.up unless adapter_name.eql?('PostgreSQL') change_column :revisions, :content, :text, :limit => 16777215 end change_column :pages, :name, :string, :limit => 255 change_column :webs, :additional_style, :text end def self.down raise ActiveRecord::IrreversibleMigration end end