概要
validates_with
詳細
ActiveRecordで、validation時にvalidates_withを利用することで、
任意のValidatorでチェックを行うことができます。
サンプル
テーブル定義
CREATE TABLE "articles" ( "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "text" text, "created_at" datetime, "updated_at" datetime );
Validation
class HogeHigeHageValidator < ActiveModel::Validator def validate(record) unless record.title =~ /\A(hoge|hige|hage)\z/i record.errors[:base] << "Title must be hoge, hige or hage." end end end class Article < ActiveRecord::Base has_many :comments, dependent: :destroy validates_with HogeHigeHageValidator end
試行
rails console(pry)で試行します。
[1] pry(main)> a = Article.new => #<Article id: nil, title: nil, text: nil, created_at: nil, updated_at: nil> [2] pry(main)> a.title = 'not hoge' => "not hoge" [3] pry(main)> a.valid? => false [4] pry(main)> a.errors.messages => {:base=>["Title must be hoge, hige or hage."]} [5] pry(main)> a.title = 'hoge' => "hoge" [6] pry(main)> a.valid? => true [7] pry(main)> a.title = 'HoGe' => "HoGe" [8] pry(main)> a.valid? => true [9] pry(main)> a.title = 'hige' => "hige" [10] pry(main)> a.valid? => true [11] pry(main)> a.title = 'hage' => "hage" [12] pry(main)> a.valid? => true [13] pry(main)> a.title = 'hogehige' => "hogehige" [14] pry(main)> a.valid? => false [15] pry(main)> a.errors.messages => {:base=>["Title must be hoge, hige or hage."]}