rails リレーション色々 - Qiita

class User < ApplicationRecord has_many :likers,foreign_key: "liker_id",class_name: "Like" has_many :likeds,foreign_key: "liked_id",class_name: "Like" end class Like < ApplicationRecord belongs_to :user, foreign_key: "liker_id", class_name: "User" belongs_to :user, foreign_key: "liked_id" , class_name: "User" end ## schema users name:string likes liker_id:integer liked_id:integer class Post has_ma