Rails put validation in a module mixin?
module Validations extend ActiveSupport::Concern included do validates :name, :length => { :minimum => 2 }, :presence => true, :uniqueness => true validates :name_seo, :length => { :minimum => 2 }, :presence => true, :uniqueness => true endendThe validates macro must be evaluated in the context of the includer, not of the module (like you probably were doing).
Your module should look something like this:
module CommonValidations extend ActiveSupport::Concern included do validates :name, :length => { :minimum => 2 }, :presence => true, :uniqueness => true validates :name_seo, :length => { :minimum => 2 }, :presence => true, :uniqueness => true endendThen in your model:
class Post < ActiveRecord::Base include CommonValidations ...endI'm using ActiveSupport::Concern here to make the code a little clearer.