Help us understand the problem. What is going on with this article?

redirect_backで直前のページにバック! ❏Rails❏

現在ツイート詳細ページ(show.html.haml)でコメントができます。
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ツイートにコメントをしたらコメントする前の状態に戻るようにします。
redirect_back(fallback_location: アクション名)で直前のページに戻すことができます。

app/controllers/comments_controller.rb
def create
  tweet = Tweet.find(params[:tweet_id])
  @comment = tweet.comments.build(comment_params)
  if @comment.save
    redirect_back(fallback_location: tweet_path(tweet))
  else
    flash[:danger] = "テキストを入力してください"
    redirect_back(fallback_location: tweet_path(tweet))
  end
end

tweet_pathはshowアクションのprefixです。

以上!



参考

https://railsguides.jp/layouts_and_rendering.html



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