Changes and improvements to the process.

blog/app/assets/config/manifest.js

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+//= link_tree ../images
+//= link_directory ../stylesheets .css

blog/app/assets/stylesheets/application.css

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+/*
+ * This is a manifest file that'll be compiled into application.css, which will include all the files
+ * listed below.
+ *
+ * Any CSS and SCSS file within this directory, lib/assets/stylesheets, or any plugin's
+ * vendor/assets/stylesheets directory can be referenced here using a relative path.
+ *
+ * You're free to add application-wide styles to this file and they'll appear at the bottom of the
+ * compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
+ * files in this directory. Styles in this file should be added after the last require_* statement.
+ * It is generally better to create a new file per style scope.
+ *
+ *= require_tree .
+ *= require_self
+ */

blog/app/assets/stylesheets/articles.scss

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+// Place all the styles related to the Articles controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: https://sass-lang.com/

blog/app/channels/application_cable/channel.rb

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+module ApplicationCable
+  class Channel < ActionCable::Channel::Base
+  end
+end

blog/app/channels/application_cable/connection.rb

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+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+  end
+end

blog/app/controllers/application_controller.rb

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+class ApplicationController < ActionController::Base
+
+end

blog/app/controllers/articles_controller.rb

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+class ArticlesController < ApplicationController
+  def index
+    @articles = Article.all
+  end
+
+  def show
+    @article = Article.find(params[:id])
+  end
+
+  def new
+    @article = Article.new
+  end
+   
+  def create
+    @article = Article.new(article_params)
+   
+    if @article.save
+      redirect_to @article
+    else
+      render 'new'
+    end
+  end
+   
+  private
+    def article_params
+      params.require(:article).permit(:title, :text)
+    end
+   
+end

blog/app/helpers/application_helper.rb

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+module ApplicationHelper
+end

blog/app/helpers/articles_helper.rb

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+module ArticlesHelper
+end

blog/app/javascript/channels/consumer.js

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+// Action Cable provides the framework to deal with WebSockets in Rails.
+// You can generate new channels where WebSocket features live using the `rails generate channel` command.
+
+import { createConsumer } from "@rails/actioncable"
+
+export default createConsumer()

blog/app/javascript/channels/index.js

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+// Load all the channels within this directory and all subdirectories.
+// Channel files must be named *_channel.js.
+
+const channels = require.context('.', true, /_channel\.js$/)
+channels.keys().forEach(channels)

blog/app/javascript/packs/application.js

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+// This file is automatically compiled by Webpack, along with any other files
+// present in this directory. You're encouraged to place your actual application logic in
+// a relevant structure within app/javascript and only use these pack files to reference
+// that code so it'll be compiled.
+
+require("@rails/ujs").start()
+require("turbolinks").start()
+require("@rails/activestorage").start()
+require("channels")
+
+
+// Uncomment to copy all static images under ../images to the output folder and reference
+// them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
+// or the `imagePath` JavaScript helper below.
+//
+// const images = require.context('../images', true)
+// const imagePath = (name) => images(name, true)

blog/app/jobs/application_job.rb

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+class ApplicationJob < ActiveJob::Base
+  # Automatically retry jobs that encountered a deadlock
+  # retry_on ActiveRecord::Deadlocked
+
+  # Most jobs are safe to ignore if the underlying records are no longer available
+  # discard_on ActiveJob::DeserializationError
+end

blog/app/mailers/application_mailer.rb

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+class ApplicationMailer < ActionMailer::Base
+  default from: 'from@example.com'
+  layout 'mailer'
+end

blog/app/models/application_record.rb

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+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

blog/app/models/article.rb

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+class Article < ApplicationRecord
+  validates :title, presence: true,
+                    length: { minimum: 5 }
+end

blog/app/views/articles/index.html.erb

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+<h1>Listing Articles</h1>
+ 
+<table>
+  <tr>
+    <th>Title</th>
+    <th>Text</th>
+    <th></th>
+  </tr>
+
+  <%= link_to 'New article', new_article_path %>
+  
+  <% @articles.each do |article| %>
+    <tr>
+      <td><%= article.title %></td>
+      <td><%= article.text %></td>
+      <td><%= link_to 'Show', article_path(article) %></td>
+    </tr>
+  <% end %>
+</table>

blog/app/views/articles/new.html.erb

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+<%= form_with scope: :article, url: articles_path, local: true do |form| %>
+ 
+  <% if @article.errors.any? %>
+    <div id="error_explanation">
+      <h2>
+        <%= pluralize(@article.errors.count, "error") %> prohibited
+        this article from being saved:
+      </h2>
+      <ul>
+        <% @article.errors.full_messages.each do |msg| %>
+          <li><%= msg %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+ 
+  <p>
+    <%= form.label :title %><br>
+    <%= form.text_field :title %>
+  </p>
+ 
+  <p>
+    <%= form.label :text %><br>
+    <%= form.text_area :text %>
+  </p>
+ 
+  <p>
+    <%= form.submit %>
+  </p>
+ 
+<% end %>
+ 
+<%= link_to 'Back', articles_path %>

blog/app/views/articles/show.html.erb

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+<p>
+  <strong>Title:</strong>
+  <%= @article.title %>
+</p>
+ 
+<p>
+  <strong>Text:</strong>
+  <%= @article.text %>
+</p>
+
+<%= link_to 'Back', articles_path %>

blog/app/views/layouts/application.html.erb

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+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Blog</title>
+    <%= csrf_meta_tags %>
+    <%= csp_meta_tag %>
+
+    <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
+    <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
+  </head>
+
+  <body>
+    <%= yield %>
+  </body>
+</html>

blog/app/views/layouts/mailer.html.erb

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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <style>
+      /* Email styles need to be inline */
+    </style>
+  </head>
+
+  <body>
+    <%= yield %>
+  </body>
+</html>

blog/app/views/layouts/mailer.text.erb

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+<%= yield %>