Finished setup of models

app/assets/javascripts/comments.coffee

+# 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/assets/stylesheets/comments.scss

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

app/controllers/comments_controller.rb

+class CommentsController < ApplicationController
+  def new
+  end
+end

app/helpers/comments_helper.rb

+module CommentsHelper
+end

app/models/comment.rb

+class Comment < ApplicationRecord
+  belongs_to :user
+  belongs_to :post
+end
\ No newline at end of file

app/models/post.rb

 class Post < ApplicationRecord
 	belongs_to :user
+	has_many :comments
 end
\ No newline at end of file

app/models/user.rb

@@ -4,6 +4,7 @@ class User < ApplicationRecord
   devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :trackable, :validatable
   has_many :posts
+  has_many :comments
 
   def to_s
   	if first_name && last_name

app/views/comments/new.html.erb

+<h1>Comments#new</h1>
+<p>Find me in app/views/comments/new.html.erb</p>

config/routes.rb

 Rails.application.routes.draw do
+  get 'comments/new'
   devise_for :users
   devise_scope :user do
   	authenticated :user do

db/migrate/20180711135455_create_comments.rb

+class CreateComments < ActiveRecord::Migration[5.2]
+  def change
+    create_table :comments do |t|
+      t.text :comment
+      t.references :user, foreign_key: true
+      t.references :post, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end

test/controllers/comments_controller_test.rb

+require 'test_helper'
+
+class CommentsControllerTest < ActionDispatch::IntegrationTest
+  test "should get new" do
+    get comments_new_url
+    assert_response :success
+  end
+
+end

test/fixtures/comments.yml

+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  comment: MyText
+  user: one
+  post: one
+
+two:
+  comment: MyText
+  user: two
+  post: two

test/models/comment_test.rb

+require 'test_helper'
+
+class CommentTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end