./bin/rails importmap:install

app/controllers/articles_controller.rb

@@ -0,0 +1,69 @@
+class ArticlesController < ApplicationController
+  before_action :set_article, only: %i[ show edit update destroy ]
+
+  # GET /articles or /articles.json
+  def index
+    @articles = Article.all
+  end
+
+  # GET /articles/1 or /articles/1.json
+  def show
+  end
+
+  # GET /articles/new
+  def new
+    @article = Article.new
+  end
+
+  # GET /articles/1/edit
+  def edit
+  end
+
+  # POST /articles or /articles.json
+  def create
+    @article = Article.new(article_params)
+
+    respond_to do |format|
+      if @article.save
+        format.html { redirect_to @article, notice: "Article was successfully created." }
+        format.json { render :show, status: :created, location: @article }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+        format.json { render json: @article.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /articles/1 or /articles/1.json
+  def update
+    respond_to do |format|
+      if @article.update(article_params)
+        format.html { redirect_to @article, notice: "Article was successfully updated." }
+        format.json { render :show, status: :ok, location: @article }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+        format.json { render json: @article.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /articles/1 or /articles/1.json
+  def destroy
+    @article.destroy
+    respond_to do |format|
+      format.html { redirect_to articles_url, notice: "Article was successfully destroyed." }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_article
+      @article = Article.find(params[:id])
+    end
+
+    # Only allow a list of trusted parameters through.
+    def article_params
+      params.require(:article).permit(:title, :text)
+    end
+end

app/controllers/welcome_controller.rb

@@ -0,0 +1,4 @@
+class WelcomeController < ApplicationController
+  def index
+  end
+end

app/helpers/articles_helper.rb

@@ -0,0 +1,2 @@
+module ArticlesHelper
+end

app/helpers/welcome_helper.rb

@@ -0,0 +1,2 @@
+module WelcomeHelper
+end

app/javascript/application.js

@@ -1,3 +1 @@
 // Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
-import "@hotwired/turbo-rails"
-import "controllers"

app/models/article.rb

@@ -0,0 +1,2 @@
+class Article < ApplicationRecord
+end

app/views/articles/_article.html.erb

@@ -0,0 +1,15 @@
+<div id="<%= dom_id article %>" class="scaffold_record">
+  <p>
+    <strong>Title:</strong>
+    <%= article.title %>
+  </p>
+
+  <p>
+    <strong>Text:</strong>
+    <%= article.text %>
+  </p>
+
+  <p>
+    <%= link_to "Show this article", article %>
+  </p>
+</div>

app/views/articles/_article.json.jbuilder

@@ -0,0 +1,2 @@
+json.extract! article, :id, :title, :text, :created_at, :updated_at
+json.url article_url(article, format: :json)

app/views/articles/_form.html.erb

@@ -0,0 +1,27 @@
+<%= form_with(model: article) 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.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= form.label :title %>
+    <%= form.text_field :title %>
+  </div>
+
+  <div class="field">
+    <%= form.label :text %>
+    <%= form.text_area :text %>
+  </div>
+
+  <div class="actions">
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/articles/edit.html.erb

@@ -0,0 +1,10 @@
+<h1>Editing article</h1>
+
+<%= render "form", article: @article %>
+
+<br>
+
+<div>
+  <%= link_to "Show this article", @article %> |
+  <%= link_to "Back to articles", articles_path %>
+</div>

app/views/articles/index.html.erb

@@ -0,0 +1,9 @@
+<p id="notice"><%= notice %></p>
+
+<h1>Article</h1>
+
+<div id="articles">
+  <%= render @articles %>
+</div>
+
+<%= link_to "New article", new_article_path %>

app/views/articles/index.json.jbuilder

@@ -0,0 +1 @@
+json.array! @articles, partial: "articles/article", as: :article

app/views/articles/new.html.erb

@@ -0,0 +1,9 @@
+<h1>New article</h1>
+
+<%= render "form", article: @article %>
+
+<br>
+
+<div>
+  <%= link_to "Back to articles", articles_path %>
+</div>

app/views/articles/show.html.erb

@@ -0,0 +1,10 @@
+<p id="notice"><%= notice %></p>
+
+<%= render @article %>
+
+<div>
+  <%= link_to "Edit this article", edit_article_path(@article) %> |
+  <%= link_to "Back to articles", articles_path %>
+
+  <%= button_to "Destroy this article", article_path(@article), method: :delete %>
+</div>

app/views/articles/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! "articles/article", article: @article

app/views/welcome/index.html.erb

@@ -0,0 +1,3 @@
+<h1>Welcome</h1>
+
+<%= link_to "Articles", articles_path %>

bin/importmap

@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
-require_relative '../config/application'
-require 'importmap/commands'
+require_relative "../config/application"
+require "importmap/commands"

config/importmap.rb

@@ -1,12 +1,6 @@
-# frozen_string_literal: true
-
 # Use direct uploads for Active Storage (remember to import "@rails/activestorage" in your application.js)
 # pin "@rails/activestorage", to: "activestorage.esm.js"
 
 # Use node modules from a JavaScript CDN by running ./bin/importmap
 
-pin 'application'
-pin '@hotwired/turbo-rails', to: 'turbo.js'
-pin '@hotwired/stimulus', to: 'stimulus.js'
-pin '@hotwired/stimulus-importmap-autoloader', to: 'stimulus-importmap-autoloader.js'
-pin_all_from 'app/javascript/controllers', under: 'controllers'
+pin "application"

config/routes.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
 Rails.application.routes.draw do
-  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
+  get 'welcome/index'
 
-  # Almost every application defines a route for the root path ("/") at the top of this file.
-  # root "articles#index"
+  resources :articles
+
+  root 'welcome#index'
 end

db/migrate/20210926221100_create_articles.rb

@@ -0,0 +1,10 @@
+class CreateArticles < ActiveRecord::Migration[7.0]
+  def change
+    create_table :articles do |t|
+      t.string :title
+      t.text :text
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
@@ -12,7 +10,16 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 0) do
+ActiveRecord::Schema.define(version: 2021_09_26_221100) do
+
   # These are extensions that must be enabled in order to support this database
-  enable_extension 'plpgsql'
+  enable_extension "plpgsql"
+
+  create_table "articles", force: :cascade do |t|
+    t.string "title"
+    t.text "text"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
 end

spec/helpers/articles_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the ArticlesHelper. For example:
+#
+# describe ArticlesHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe ArticlesHelper, type: :helper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/helpers/welcome_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the WelcomeHelper. For example:
+#
+# describe WelcomeHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe WelcomeHelper, type: :helper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/models/article_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe Article, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/requests/articles_spec.rb

@@ -0,0 +1,130 @@
+ require 'rails_helper'
+
+# This spec was generated by rspec-rails when you ran the scaffold generator.
+# It demonstrates how one might use RSpec to test the controller code that
+# was generated by Rails when you ran the scaffold generator.
+#
+# It assumes that the implementation code is generated by the rails scaffold
+# generator. If you are using any extension libraries to generate different
+# controller code, this generated spec may or may not pass.
+#
+# It only uses APIs available in rails and/or rspec-rails. There are a number
+# of tools you can use to make these specs even more expressive, but we're
+# sticking to rails and rspec-rails APIs to keep things simple and stable.
+
+RSpec.describe "/articles", type: :request do
+  
+  # Article. As you add validations to Article, be sure to
+  # adjust the attributes here as well.
+  let(:valid_attributes) {
+    skip("Add a hash of attributes valid for your model")
+  }
+
+  let(:invalid_attributes) {
+    skip("Add a hash of attributes invalid for your model")
+  }
+
+  describe "GET /index" do
+    it "renders a successful response" do
+      Article.create! valid_attributes
+      get articles_url
+      expect(response).to be_successful
+    end
+  end
+
+  describe "GET /show" do
+    it "renders a successful response" do
+      article = Article.create! valid_attributes
+      get article_url(article)
+      expect(response).to be_successful
+    end
+  end
+
+  describe "GET /new" do
+    it "renders a successful response" do
+      get new_article_url
+      expect(response).to be_successful
+    end
+  end
+
+  describe "GET /edit" do
+    it "render a successful response" do
+      article = Article.create! valid_attributes
+      get edit_article_url(article)
+      expect(response).to be_successful
+    end
+  end
+
+  describe "POST /create" do
+    context "with valid parameters" do
+      it "creates a new Article" do
+        expect {
+          post articles_url, params: { article: valid_attributes }
+        }.to change(Article, :count).by(1)
+      end
+
+      it "redirects to the created article" do
+        post articles_url, params: { article: valid_attributes }
+        expect(response).to redirect_to(article_url(Article.last))
+      end
+    end
+
+    context "with invalid parameters" do
+      it "does not create a new Article" do
+        expect {
+          post articles_url, params: { article: invalid_attributes }
+        }.to change(Article, :count).by(0)
+      end
+
+      it "renders a successful response (i.e. to display the 'new' template)" do
+        post articles_url, params: { article: invalid_attributes }
+        expect(response).to be_successful
+      end
+    end
+  end
+
+  describe "PATCH /update" do
+    context "with valid parameters" do
+      let(:new_attributes) {
+        skip("Add a hash of attributes valid for your model")
+      }
+
+      it "updates the requested article" do
+        article = Article.create! valid_attributes
+        patch article_url(article), params: { article: new_attributes }
+        article.reload
+        skip("Add assertions for updated state")
+      end
+
+      it "redirects to the article" do
+        article = Article.create! valid_attributes
+        patch article_url(article), params: { article: new_attributes }
+        article.reload
+        expect(response).to redirect_to(article_url(article))
+      end
+    end
+
+    context "with invalid parameters" do
+      it "renders a successful response (i.e. to display the 'edit' template)" do
+        article = Article.create! valid_attributes
+        patch article_url(article), params: { article: invalid_attributes }
+        expect(response).to be_successful
+      end
+    end
+  end
+
+  describe "DELETE /destroy" do
+    it "destroys the requested article" do
+      article = Article.create! valid_attributes
+      expect {
+        delete article_url(article)
+      }.to change(Article, :count).by(-1)
+    end
+
+    it "redirects to the articles list" do
+      article = Article.create! valid_attributes
+      delete article_url(article)
+      expect(response).to redirect_to(articles_url)
+    end
+  end
+end

spec/requests/welcome_spec.rb

@@ -0,0 +1,7 @@
+require 'rails_helper'
+
+RSpec.describe "Welcomes", type: :request do
+  describe "GET /index" do
+    pending "add some examples (or delete) #{__FILE__}"
+  end
+end

spec/routing/articles_routing_spec.rb

@@ -0,0 +1,38 @@
+require "rails_helper"
+
+RSpec.describe ArticlesController, type: :routing do
+  describe "routing" do
+    it "routes to #index" do
+      expect(get: "/articles").to route_to("articles#index")
+    end
+
+    it "routes to #new" do
+      expect(get: "/articles/new").to route_to("articles#new")
+    end
+
+    it "routes to #show" do
+      expect(get: "/articles/1").to route_to("articles#show", id: "1")
+    end
+
+    it "routes to #edit" do
+      expect(get: "/articles/1/edit").to route_to("articles#edit", id: "1")
+    end
+
+
+    it "routes to #create" do
+      expect(post: "/articles").to route_to("articles#create")
+    end
+
+    it "routes to #update via PUT" do
+      expect(put: "/articles/1").to route_to("articles#update", id: "1")
+    end
+
+    it "routes to #update via PATCH" do
+      expect(patch: "/articles/1").to route_to("articles#update", id: "1")
+    end
+
+    it "routes to #destroy" do
+      expect(delete: "/articles/1").to route_to("articles#destroy", id: "1")
+    end
+  end
+end

spec/views/articles/edit.html.erb_spec.rb

@@ -0,0 +1,21 @@
+require 'rails_helper'
+
+RSpec.describe "articles/edit", type: :view do
+  before(:each) do
+    @article = assign(:article, Article.create!(
+      title: "MyString",
+      text: "MyText"
+    ))
+  end
+
+  it "renders the edit article form" do
+    render
+
+    assert_select "form[action=?][method=?]", article_path(@article), "post" do
+
+      assert_select "input[name=?]", "article[title]"
+
+      assert_select "textarea[name=?]", "article[text]"
+    end
+  end
+end

spec/views/articles/index.html.erb_spec.rb

@@ -0,0 +1,22 @@
+require 'rails_helper'
+
+RSpec.describe "articles/index", type: :view do
+  before(:each) do
+    assign(:articles, [
+      Article.create!(
+        title: "Title",
+        text: "MyText"
+      ),
+      Article.create!(
+        title: "Title",
+        text: "MyText"
+      )
+    ])
+  end
+
+  it "renders a list of articles" do
+    render
+    assert_select "tr>td", text: "Title".to_s, count: 2
+    assert_select "tr>td", text: "MyText".to_s, count: 2
+  end
+end

spec/views/articles/new.html.erb_spec.rb

@@ -0,0 +1,21 @@
+require 'rails_helper'
+
+RSpec.describe "articles/new", type: :view do
+  before(:each) do
+    assign(:article, Article.new(
+      title: "MyString",
+      text: "MyText"
+    ))
+  end
+
+  it "renders new article form" do
+    render
+
+    assert_select "form[action=?][method=?]", articles_path, "post" do
+
+      assert_select "input[name=?]", "article[title]"
+
+      assert_select "textarea[name=?]", "article[text]"
+    end
+  end
+end

spec/views/articles/show.html.erb_spec.rb

@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+RSpec.describe "articles/show", type: :view do
+  before(:each) do
+    @article = assign(:article, Article.create!(
+      title: "Title",
+      text: "MyText"
+    ))
+  end
+
+  it "renders attributes in <p>" do
+    render
+    expect(rendered).to match(/Title/)
+    expect(rendered).to match(/MyText/)
+  end
+end