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【Rails】ActiveRecordの機能について

Last updated at Posted at 2022-01-06

ActiveRecordの機能について

・RubyのコードをSQLへ変換する機能

・ActiveRecord経由でデータベースから取得したデータを自動的にインスタンス化して返す機能

>id = 1
>book = Book.find(id)  

#findメソッドでデータベースからデータを取得。
#そして返ってきた結果をbookという変数へ代入している。
#このbookに入っているものがBookのインスタンス。

引用元:基礎から学ぶ Ruby on Rails: 1週間の短期間講座!楽しく学ぶRailsの新しい入門書

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