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@HeppokoNeet(へっぽこ ニート)

【備忘録】Railsリレーション検索・作成総集

Posted at
  • ユーザー VS 性別（１：多）
  • ユーザー VS スキル （多：多）

１:多(検索)

User.find_by(sex_id: 1)

多:多(検索)

User.includes(:skills).where(user_skills: { skill_id: 1 })

※user_skillsは中間テーブル

多:多(作成)

User.new(skills: [Skill.find(1)])
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