class RenameRolesToPerms < ActiveRecord::Migration def self.up rename_table :roles, :perms rename_table :users_roles, :users_perms rename_column :users_perms, :role_id, :perm_id #remove_index :users_perms, end def self.down #rename_index :users_perms, :index_users_perms_on_user_id_and_perms_id, :index_users_roles_on_user_id_and_role_id rename_column :users_perms, :perm_id, :role_id rename_table :users_perms, :users_roles rename_table :perms, :roles end end