Add Comments

Gemfile

@@ -25,4 +25,5 @@ gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
 gem 'devise', '~> 3.4.0'
 gem 'bootstrap-sass', '~> 3.3.5.1'
-gem 'acts_as_votable', '~> 0.10.0'
+gem 'acts_as_votable', '~> 0.10.0'
+gem 'simple_form', '~> 3.1.1'

Gemfile.lock

@@ -133,6 +133,9 @@ GEM
     sdoc (0.4.1)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
+    simple_form (3.1.1)
+      actionpack (~> 4.0)
+      activemodel (~> 4.0)
     sprockets (3.3.3)
       rack (~> 1.0)
     sprockets-rails (2.3.2)
@@ -176,6 +179,7 @@ DEPENDENCIES
   rails (= 4.2.3)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
+  simple_form (~> 3.1.1)
   sqlite3
   turbolinks
   tzinfo-data

app/assets/javascripts/comments.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/controllers/comments_controller.rb

@@ -0,0 +1,43 @@
+class CommentsController < ApplicationController
+  before_action :set_comment, only: [:show, :edit, :update, :destroy]
+
+
+  # POST /comments
+  # POST /comments.json
+  def create
+    @link = Link.find(params[:link_id])
+    @comment = @link.comments.new(comment_params)
+    @comment.user = current_user
+
+    respond_to do |format|
+      if @comment.save
+        format.html { redirect_to @link, notice: 'Comment was successfully created.' }
+        format.json { render json: @comment, status: :created, location: @comment }
+      else
+        format.html { render action: "new" }
+        format.json { render json: @comment.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /comments/1
+  # DELETE /comments/1.json
+  def destroy
+    @comment.destroy
+    respond_to do |format|
+      format.html { redirect_to comments_url, notice: 'Comment was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_comment
+      @comment = Comment.find(params[:id])
+    end
+
+    # Never trust parameters from the scary internet, only allow the white list through.
+    def comment_params
+      params.require(:comment).permit(:link_id, :body, :user_id)
+    end
+end

app/helpers/comments_helper.rb

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

app/models/comment.rb

@@ -0,0 +1,4 @@
+class Comment < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :link
+end

app/models/link.rb

@@ -1,4 +1,5 @@
 class Link < ActiveRecord::Base
 	acts_as_votable
 	belongs_to :user
+	has_many :comments
 end

app/views/comments/_comment.html.erb

@@ -0,0 +1,14 @@
+<%= div_for(comment) do %>
+	<div class="comments_wrapper clearfix">
+		<div class="pull-left">
+			<p class="lead"><%= comment.body %></p>
+			<p><small>Submitted <strong><%= time_ago_in_words(comment.created_at) %> ago</strong> by <%= comment.user.email %></small></p>
+		</div>
+
+		<div class="btn-group pull-right">
+			<% if comment.user == current_user -%>
+				<%= link_to 'Destroy', comment, method: :delete, data: { confirm: 'Are you sure?' }, class: "btn btn-sm btn-default" %>
+			<% end %>
+		</div>
+	</div>
+<% end %>

app/views/comments/_form.html.erb

@@ -0,0 +1,29 @@
+<%= form_for(@comment) do |f| %>
+  <% if @comment.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(@comment.errors.count, "error") %> prohibited this comment from being saved:</h2>
+
+      <ul>
+      <% @comment.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :link_id %><br>
+    <%= f.number_field :link_id %>
+  </div>
+  <div class="field">
+    <%= f.label :body %><br>
+    <%= f.text_area :body %>
+  </div>
+  <div class="field">
+    <%= f.label :user_id %><br>
+    <%= f.text_field :user_id %>
+  </div>
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

app/views/comments/edit.html.erb

@@ -0,0 +1,6 @@
+<h1>Editing Comment</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Show', @comment %> |
+<%= link_to 'Back', comments_path %>

app/views/comments/index.html.erb

@@ -0,0 +1,31 @@
+<p id="notice"><%= notice %></p>
+
+<h1>Listing Comments</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Link</th>
+      <th>Body</th>
+      <th>User</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @comments.each do |comment| %>
+      <tr>
+        <td><%= comment.link_id %></td>
+        <td><%= comment.body %></td>
+        <td><%= comment.user %></td>
+        <td><%= link_to 'Show', comment %></td>
+        <td><%= link_to 'Edit', edit_comment_path(comment) %></td>
+        <td><%= link_to 'Destroy', comment, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Comment', new_comment_path %>

app/views/comments/index.json.jbuilder

@@ -0,0 +1,4 @@
+json.array!(@comments) do |comment|
+  json.extract! comment, :id, :link_id, :body, :user_id
+  json.url comment_url(comment, format: :json)
+end

app/views/comments/new.html.erb

@@ -0,0 +1,5 @@
+<h1>New Comment</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Back', comments_path %>

app/views/comments/show.html.erb

@@ -0,0 +1,19 @@
+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Link:</strong>
+  <%= @comment.link_id %>
+</p>
+
+<p>
+  <strong>Body:</strong>
+  <%= @comment.body %>
+</p>
+
+<p>
+  <strong>User:</strong>
+  <%= @comment.user %>
+</p>
+
+<%= link_to 'Edit', edit_comment_path(@comment) %> |
+<%= link_to 'Back', comments_path %>

app/views/comments/show.json.jbuilder

@@ -0,0 +1 @@
+json.extract! @comment, :id, :link_id, :body, :user_id, :created_at, :updated_at

app/views/links/show.html.erb

@@ -24,4 +24,20 @@
     Downvote
     <%= @link.get_downvotes.size %>
   <% end %>
-</div>
+</div>
+
+<h3 class="comments_title">
+  <%= @link.comments.count %> Comments
+</h3>
+
+<div id="comments">
+  <%= render :partial => @link.comments %>
+</div>
+
+<%= simple_form_for [@link, Comment.new]  do |f| %>
+  <div class="field">
+    <%= f.text_area :body, class: "form-control" %>
+  </div>
+  <br>
+  <%= f.submit "Add Comment", class: "btn btn-primary" %>
+<% end %>

config/routes.rb

@@ -1,11 +1,13 @@
 Rails.application.routes.draw do
+  resources :comments
   devise_for :users
 
   resources :links do
     member do
       put "like", to:    "links#upvote"
       put "dislike", to: "links#downvote"
     end
+    resources :comments
   end
 
   root 'links#index'

db/migrate/20150831212900_create_comments.rb

@@ -0,0 +1,12 @@
+class CreateComments < ActiveRecord::Migration
+  def change
+    create_table :comments do |t|
+      t.integer :link_id
+      t.text :body
+      t.references :user, index: true, foreign_key: true
+
+      t.timestamps null: false
+    end
+    add_index :comments, :link_id
+  end
+end

db/schema.rb

@@ -11,7 +11,18 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150831210723) do
+ActiveRecord::Schema.define(version: 20150831212900) do
+
+  create_table "comments", force: :cascade do |t|
+    t.integer  "link_id"
+    t.text     "body"
+    t.integer  "user_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  add_index "comments", ["link_id"], name: "index_comments_on_link_id"
+  add_index "comments", ["user_id"], name: "index_comments_on_user_id"
 
   create_table "links", force: :cascade do |t|
     t.string   "title"

test/controllers/comments_controller_test.rb

@@ -0,0 +1,49 @@
+require 'test_helper'
+
+class CommentsControllerTest < ActionController::TestCase
+  setup do
+    @comment = comments(:one)
+  end
+
+  test "should get index" do
+    get :index
+    assert_response :success
+    assert_not_nil assigns(:comments)
+  end
+
+  test "should get new" do
+    get :new
+    assert_response :success
+  end
+
+  test "should create comment" do
+    assert_difference('Comment.count') do
+      post :create, comment: { body: @comment.body, link_id: @comment.link_id, user_id: @comment.user_id }
+    end
+
+    assert_redirected_to comment_path(assigns(:comment))
+  end
+
+  test "should show comment" do
+    get :show, id: @comment
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get :edit, id: @comment
+    assert_response :success
+  end
+
+  test "should update comment" do
+    patch :update, id: @comment, comment: { body: @comment.body, link_id: @comment.link_id, user_id: @comment.user_id }
+    assert_redirected_to comment_path(assigns(:comment))
+  end
+
+  test "should destroy comment" do
+    assert_difference('Comment.count', -1) do
+      delete :destroy, id: @comment
+    end
+
+    assert_redirected_to comments_path
+  end
+end

test/fixtures/comments.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  link_id: 1
+  body: MyText
+  user_id: 
+
+two:
+  link_id: 1
+  body: MyText
+  user_id: 

test/models/comment_test.rb

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