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10月23日の学習内容「RailsTutorial5,6,7章」

こんにちは、あおい(@aoi_programmer)です。

本日もお疲れ様でした。
昨日に引き続きRailsTutorialを進めました。

ユーザー管理機能ってdeviseで簡単に済ませていたけど、どんな作りになっているのか気になりますよね。僕は気になったので、学習しちゃいました。

意外と簡単だと思っていたのですが、
セッションらへんから複雑になってきて難しかったですね。

本日の勉強内容

https://twitter.com/aoi_programming/status/1319433170849165312?s=20

上記の通りです。
では、学んだ内容を順にアウトプットしていきます。

dependent: :destroy

https://twitter.com/aoi_programming/status/1319484144171151360?s=20

if Rails.env.development?

railsには3つの環境がありますね。

  • 開発環境
  • テスト環境
  • 本番環境
  • 今回の場合は開発環境のみ表示してくれる設定です。

    pluralizeメソッド

    https://twitter.com/aoi_programming/status/1319549743647748096?s=20

    deviseでユーザー管理機能を実装していたら出会えなかったであろうヘルパーメソッドですね。分かりませんが、笑

    エラー文以外に使い道はあるのでしょうか?
    でもこの造りは面白いのでぜひ活用していきたいです。

    rails routes | grep なんちゃら

    これめちゃ使えると思うから明日から使お。

    flash.now

    https://twitter.com/aoi_programming/status/1319600077476777985?s=20

    「flash」と「flash.now」の違いについて分かりやすく書かれています。

    このブログでもアウトプット代わりに簡単に説明しますね。

    flash

    flashは次のアクションが来るまで変化がありません。
    そのため、renderなどのviewファイルを呼び出すだけではアクションに入らないので、一切変化することはないです。

    flash.now

    一方、こちらは次のアクションが来なくても、何かしらの動きがあれば変化します。

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