Add comments'

app/controllers/comments_controller.rb

@@ -0,0 +1,13 @@
+class CommentsController < ApplicationController
+  before_action :set_article
+
+  def create
+    @article.comments.create! params.required(:comment).permit(:content)
+    redirect_to @article
+  end
+
+  private
+    def set_article
+      @article = Article.find(params[:article_id])
+    end
+end

app/helpers/comments_helper.rb

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

app/models/article.rb

@@ -1,5 +1,5 @@
 class Article < ApplicationRecord
-  has_rich_text :text
+  has_many :comments, dependent: :destroy
   has_rich_text :content
   validates_presence_of :title
 end

app/models/comment.rb

@@ -0,0 +1,4 @@
+class Comment < ApplicationRecord
+  belongs_to :article
+  broadcasts_to :article
+end

app/views/articles/_article.html.erb

@@ -5,8 +5,16 @@
   </p>
 
   <p>
-    <strong>Text:</strong>
-    <%= article.text %>
+    Posted <%= time_tag article.created_at %>
+  </p>
+
+  <p>
+    <strong><%= pluralize article.comments.count, "comment" %></strong>
+  </p>
+
+  <p>
+    <strong>Content:</strong>
+    <%= article.content %>
   </p>
 
   <p>

app/views/articles/_comments.html.erb

@@ -0,0 +1,7 @@
+<h2>Comments</h2>
+
+<div id="comments">
+  <%= render article.comments %>
+</div>
+
+<%= render "comments/new", article: article %>

app/views/articles/show.html.erb

@@ -3,6 +3,7 @@
 <p id="notice"><%= notice %></p>
 
 <%= render @article %>
+<%= render "articles/comments", article: @article %>
 
 <div>
   <%= link_to "Edit this article", edit_article_path(@article) %> |

app/views/comments/_comment.html.erb

@@ -0,0 +1,4 @@
+<div id="<%= dom_id comment %>">
+  <%= comment.content %>
+  - <%= time_tag comment.created_at %>
+</div>

app/views/comments/_new.html.erb

@@ -0,0 +1,5 @@
+<%= form_with model: [ article, Comment.new ] do |form| %>
+  Your comment:<br>
+  <%= form.text_area :content, size: "20x5" %>
+  <%= form.submit %>
+<% end %>

config/routes.rb

@@ -3,7 +3,9 @@
 Rails.application.routes.draw do
   get 'welcome/index'
 
-  resources :articles
+  resources :articles do
+    resources :comments
+  end
 
   root 'welcome#index'
 end

db/migrate/20211216185503_create_comments.rb

@@ -0,0 +1,10 @@
+class CreateComments < ActiveRecord::Migration[7.0]
+  def change
+    create_table :comments do |t|
+      t.references :article, null: false, foreign_key: true
+      t.text :content
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_12_16_184103) do
+ActiveRecord::Schema.define(version: 2021_12_16_185503) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -60,6 +60,15 @@ ActiveRecord::Schema.define(version: 2021_12_16_184103) do
     t.datetime "updated_at", precision: 6, null: false
   end
 
+  create_table "comments", force: :cascade do |t|
+    t.bigint "article_id", null: false
+    t.text "content"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["article_id"], name: "index_comments_on_article_id"
+  end
+
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
+  add_foreign_key "comments", "articles"
 end

spec/helpers/comments_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the CommentsHelper. For example:
+#
+# describe CommentsHelper 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 CommentsHelper, type: :helper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/models/comment_spec.rb

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

spec/requests/comments_spec.rb

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