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redirect_toとrenderの違い

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#はじめに

処理を書くたびにまだよく混同してしまうので、
パッとすぐ思い出せるようにメモしておきます。

#違い

###redirect_to

user_controller.rb
def ~
 # 処理

 redirect_to("/app/posts/new")
end

指定先:
URL(/URL/〜/〜/)

ルート:
controller → URL → route → controller → view

主な用途:
データの更新や削除が必要な場合など → 「適切なcontrollerでの処理が必要」なとき

###render

user_controller.rb
def ~
 # 処理

 render("user/edit")
end

指定先:
ディレクトリ/ビュー

ルート:
controller → view

主な用途:
ログインや入力形式に失敗した場合など → 「ただエラーを表示させたい」とき

#参考

【Rails】renderとredirect_toの違いと使い分け
【Rails】flashメッセージを使用して簡易メッセージを表示させる詳しい方法と解説

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