comments

app/controllers/comments_controller.rb

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

app/helpers/comments_helper.rb

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

app/models/comment.rb

@@ -0,0 +1,3 @@
+class Comment < ApplicationRecord
+  belongs_to :post
+end

app/models/post.rb

@@ -1,4 +1,5 @@
 class Post < ApplicationRecord
     validates_presence_of :title
     has_rich_text :content
+    has_many :comments
 end

app/views/comments/_comment.html.erb

@@ -0,0 +1,4 @@
+<div id="<%= dom_id(comment) %>">
+    <%= comment.content %>
+    - <%= time_tag comment.created_at, "data-local": "time-ago" %>
+</div>

app/views/comments/_new.html.erb

@@ -0,0 +1,5 @@
+<%= form_with model: [ post, Comment.new ] do |form| %>
+    Your comment: <br>
+    <%= form.text_area :content, size: "anoth20x5" %>
+    <%= form.submit %>
+<% end %>

app/views/posts/_comments.html.erb

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

app/views/posts/_post.html.erb

@@ -5,7 +5,7 @@
   </p>
 
   <p>Posted <%= time_tag post.created_at, "data-local": "time-ago" %></p>
-
+  <p><strong><%= pluralize(post.comments.count, "comment") %></strong></p>
   <p>
     <strong>Content:</strong>
     <%= post.content %>

app/views/posts/show.html.erb

@@ -1,7 +1,7 @@
 <p style="color: green"><%= notice %></p>
 
 <%= render @post %>
-
+<%= render "posts/comments", post: @post%>
 <div>
   <%= link_to "Edit this post", edit_post_path(@post) %> |
   <%= link_to "Back to posts", posts_path %>

config/routes.rb

@@ -1,5 +1,7 @@
 Rails.application.routes.draw do
-  resources :posts
+  resources :posts do
+    resources :comments
+  end
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Defines the root path route ("/")

db/migrate/20230316193338_create_comments.rb

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

test/controllers/comments_controller_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class CommentsControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/fixtures/comments.yml

@@ -0,0 +1,9 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  post: one
+  content: MyText
+
+two:
+  post: two
+  content: MyText

test/models/comment_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class CommentTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end