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Routing Error(uninitialized constant HomesController Object.const_get...)の解決について

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概要

railsのタグ機能の練習がしたくて、railsの環境を構築しましたが、routingのエラーが起きたので解決の方法を記述します。

環境

rails 7.0.4.2
ruby 3.1.2
AWS
cloud9
mac

エラーの意味

エラー文をdeeplで検索します。

uninitialized constant HomesController Object.const_get(camel_cased_word) ^^^^^^^^^^ Did you mean? HomeController raise MissingController.new(error.message, error.name) ^^^^^

uninitialized constant HomesController Object.const_get(camel_cased_word) ^^^^ ってこと?HomeController raise MissingController.new(error.message, error.name) ^^^。

このやろう...

整理します。

uninitialized constant HomesController

未初期化の定数HomesController

HomeController raise Missing

HomeControllerが見つからない
HomeControllerが存在しない
HomeControllerがない場合

ん?Homecontrollerがない?
どういうことだ?と思って状況をもう一度整理します。

routing、controller、view

route.rb
Rails.application.routes.draw do
  root to: "homes#top"
  # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html

  # Defines the root path route ("/")
  # root "articles#index"
end
home_controller.rb
class HomeController < ApplicationController
  def top
  end
end
top.html.erb
<h1>test</h1>

あ!

route.rb
Rails.application.routes.draw do
  root to: "homes#top"
  # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html

  # Defines the root path route ("/")
  # root "articles#index"
end

root to: "homes#top"

この書き方だと、homesコントローラーのtopアクションを呼び出すよ!ってことなので、今回のhome_controllerとは合わない。
HomeController raise Missing

HomeControllerが見つからない
HomeControllerが存在しない
HomeControllerがない場合
や、そもそもの
uninitialized constant HomesController Object.const_get(camel_cased_word) ^^^^ ってこと?HomeController raise MissingController.new(error.message, error.name) ^^^。
は正しかったんだ・・・ごめんよ・・・

結論

そもそもエラー文をよく読めって話ですね。気をつけます。

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