Railsで「No route matches [GET] "/contacts/confirm"」とエラーが出る

Question

こちらの記事（https://qiita.com/japwork/items/145645e281b81d9bf92c）
を参考にしながら、お問合せフォームを作成しています。
一通り作成し終えて、作成した contacts/confirm　にアクセスしようと思ったんですが、以下のようなエラーが出ました。

No route matches [GET] "/contacts/confirm"

Rails.root: /app
Application Trace | Framework Trace | Full Trace
actionpack (6.1.4.6) lib/action_dispatch/middleware/debug_exceptions.rb:33:in `call'
web-console (4.2.0) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.2.0) lib/web_console/middleware.rb:19:in `block in call'
web-console (4.2.0) lib/web_console/middleware.rb:17:in `catch'
web-console (4.2.0) lib/web_console/middleware.rb:17:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.1.4.6) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.1.4.6) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.1.4.6) lib/active_support/tagged_logging.rb:99:in `block in tagged'
activesupport (6.1.4.6) lib/active_support/tagged_logging.rb:37:in `tagged'
activesupport (6.1.4.6) lib/active_support/tagged_logging.rb:99:in `tagged'
railties (6.1.4.6) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.4.2) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/request_id.rb:26:in `call'
rack (2.2.3) lib/rack/method_override.rb:24:in `call'
rack (2.2.3) lib/rack/runtime.rb:22:in `call'
activesupport (6.1.4.6) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/static.rb:24:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.1.4.6) lib/action_dispatch/middleware/host_authorization.rb:119:in `call'
rack-mini-profiler (2.3.4) lib/mini_profiler/profiler.rb:393:in `call'
webpacker (5.4.3) lib/webpacker/dev_server_proxy.rb:25:in `perform_request'
rack-proxy (0.7.2) lib/rack/proxy.rb:67:in `call'
railties (6.1.4.6) lib/rails/engine.rb:539:in `call'
puma (5.6.2) lib/puma/configuration.rb:252:in `call'
puma (5.6.2) lib/puma/request.rb:77:in `block in handle_request'
puma (5.6.2) lib/puma/thread_pool.rb:340:in `with_force_shutdown'
puma (5.6.2) lib/puma/request.rb:76:in `handle_request'
puma (5.6.2) lib/puma/server.rb:441:in `process_client'
puma (5.6.2) lib/puma/thread_pool.rb:147:in `block in spawn_thread'

正しくルーティングが設定されていると思ったんですが、理由が分かる方がいれば教えて頂きたいです。

config/routes.rb
Rails.application.routes.draw do
  get 'mypage', to: 'users#me'
  get 'user_edit', to: 'users#edit'
  post 'login', to: 'sessions#create'
  delete 'logout', to: 'sessions#destroy'
  get 'about', to: 'application#about'
  get 'contact', to: 'application#contact'
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
  root 'home#index'
  # root 'boards#index'
  resources :users, only: %i[new create edit update show]
  resources :boards
  resources :comments, only: %i[create destroy]

#該当箇所
  resources :contacts, only: [:new, :create]
  post 'contacts/confirm', to: 'contacts#confirm', as: 'confirm'
  post 'contacts/back', to: 'contacts#back', as: 'back'
  get 'done', to: 'contacts#done', as: 'done'
end

#views/contacts/confirm.html.erb
<table>
  <tbody>
    <tr>
      <td class="text-center" style="width: 30%;">お名前</td>
      <td><%= @contact.name %></td>
    </tr>
    <tr>
      <td class="text-center">メッセージ</td>
      <td style="white-space: pre-wrap;"><%= @contact.message %></td>
    </tr>
  </tbody>
</table>

<%= form_for(@contact) do |f| %>
  <%= f.hidden_field :name %>
  <%= f.hidden_field :email %>
  <%= f.hidden_field :phone_number %>
  <%= f.hidden_field :subject %>
  <%= f.hidden_field :message %>
  <div><%= f.submit '送信' %></div>
<% end %>
<%= form_for @contact, url: back_path do |f| %>
  <%= f.hidden_field :name %>
  <%= f.hidden_field :email %>
  <%= f.hidden_field :phone_number %>
  <%= f.hidden_field :subject %>
  <%= f.hidden_field :message %>
  <div><%= f.submit '入力画面に戻る' %></div>
<% end %>

#contacts_controller.rb
class ContactsController < ApplicationController
   def new
    @contact = Contact.new
  end

  # 確認画面を作成する場合はこのような記述になるかと思います。
  # newアクションから入力内容を受け取り、
  # 送信ボタンを押されたらcreateアクションを実行します。
  def confirm
    @contact = Contact.new(contact_params)
    if @contact.invalid?
      render :new
    end
  end
　
  # 入力内容に誤りがあった場合、
  # 入力内容を保持したまま前のページに戻るのが当たり前になっているかと思いますが、
  # backアクションを定義することで可能となります。
  def back
    @contact = Contact.new(contact_params)
    render :new
  end

  # 実際に送信するアクションになります。
  # ここで初めて入力内容を保存します。
  # セキュリティーのためにも一定時間で入力内容の削除を行ってもいいかもしれません。
  def create
    @contact = Contact.new(contact_params)
    if @contact.save
      ContactMailer.send_mail(@contact).deliver_now
      redirect_to done_path
    else
      render :new
    end
  end

  # 送信完了画面を使用する場合お使いください。
  def done```ここに言語を入力
コード

end

private

def contact_params
params.require(:contact)
.permit(:email,
:name,
:phone_number,
:subject,
:message
)
end
end

```Ruby
#gemfile
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.7.5'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
gem 'rails', '~> 6.1.4', '>= 6.1.4.6'
# Use mysql as the database for Active Record
gem 'mysql2', '~> 0.5'
# Use Puma as the app server
gem 'puma', '~> 5.0'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 5.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.4', require: false
gem 'jquery-rails'
gem 'bootstrap', '~>4.0.0'
gem 'kaminari'

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'rspec-rails', '~> 3.8'
  gem 'rails-controller-testing'
  gem 'rails-flog', require: 'flog'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 4.1.0'
  # Display performance information such as SQL time and flame graphs for each request in your browser.
  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
  gem 'rack-mini-profiler', '~> 2.0'
  gem 'listen', '~> 3.3'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 3.26'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Answer 1

ブラウザーから urlを入力してアクセスしたのでしょうか。GET になっています。routes での定義は POST です。

その方法では GET になっていまいます。 viewを書いてそのlinkから行くか、
methodを指定できる curl などで試してください

Comments

[takoyan]

コメントありがとうございます。
viewを書いてそのlinkから行くか、methodを指定できる curl などで試してください。とあったんですが、pathを指定する方法とcontacts/confirmからアクセスする方法しか調べても分からず詰まっている感じです。