rails g scaffold Post title:text body:text user:references

rails-blog/app/assets/javascripts/posts.coffee

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+# 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/

rails-blog/app/assets/stylesheets/posts.scss

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

rails-blog/app/controllers/posts_controller.rb

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+class PostsController < ApplicationController
+  before_action :set_post, only: [:show, :edit, :update, :destroy]
+
+  # GET /posts
+  # GET /posts.json
+  def index
+    @posts = Post.all
+  end
+
+  # GET /posts/1
+  # GET /posts/1.json
+  def show
+  end
+
+  # GET /posts/new
+  def new
+    @post = Post.new
+  end
+
+  # GET /posts/1/edit
+  def edit
+  end
+
+  # POST /posts
+  # POST /posts.json
+  def create
+    @post = Post.new(post_params)
+
+    respond_to do |format|
+      if @post.save
+        format.html { redirect_to @post, notice: 'Post was successfully created.' }
+        format.json { render :show, status: :created, location: @post }
+      else
+        format.html { render :new }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /posts/1
+  # PATCH/PUT /posts/1.json
+  def update
+    respond_to do |format|
+      if @post.update(post_params)
+        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
+        format.json { render :show, status: :ok, location: @post }
+      else
+        format.html { render :edit }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /posts/1
+  # DELETE /posts/1.json
+  def destroy
+    @post.destroy
+    respond_to do |format|
+      format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_post
+      @post = Post.find(params[:id])
+    end
+
+    # Never trust parameters from the scary internet, only allow the white list through.
+    def post_params
+      params.require(:post).permit(:title, :body, :user_id)
+    end
+end

rails-blog/app/helpers/posts_helper.rb

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+module PostsHelper
+end

rails-blog/app/models/post.rb

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+class Post < ApplicationRecord
+  belongs_to :user
+end

rails-blog/app/views/posts/_form.html.erb

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

rails-blog/app/views/posts/_post.json.jbuilder

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+json.extract! post, :id, :title, :body, :user_id, :created_at, :updated_at
+json.url post_url(post, format: :json)

rails-blog/app/views/posts/edit.html.erb

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+<h1>Editing Post</h1>
+
+<%= render 'form', post: @post %>
+
+<%= link_to 'Show', @post %> |
+<%= link_to 'Back', posts_path %>

rails-blog/app/views/posts/index.html.erb

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+<p id="notice"><%= notice %></p>
+
+<h1>Posts</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Title</th>
+      <th>Body</th>
+      <th>User</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @posts.each do |post| %>
+      <tr>
+        <td><%= post.title %></td>
+        <td><%= post.body %></td>
+        <td><%= post.user %></td>
+        <td><%= link_to 'Show', post %></td>
+        <td><%= link_to 'Edit', edit_post_path(post) %></td>
+        <td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Post', new_post_path %>

rails-blog/app/views/posts/index.json.jbuilder

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+json.array! @posts, partial: 'posts/post', as: :post

rails-blog/app/views/posts/new.html.erb

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+<h1>New Post</h1>
+
+<%= render 'form', post: @post %>
+
+<%= link_to 'Back', posts_path %>

rails-blog/app/views/posts/show.html.erb

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+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Title:</strong>
+  <%= @post.title %>
+</p>
+
+<p>
+  <strong>Body:</strong>
+  <%= @post.body %>
+</p>
+
+<p>
+  <strong>User:</strong>
+  <%= @post.user %>
+</p>
+
+<%= link_to 'Edit', edit_post_path(@post) %> |
+<%= link_to 'Back', posts_path %>

rails-blog/app/views/posts/show.json.jbuilder

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+json.partial! "posts/post", post: @post

rails-blog/config/routes.rb

@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
+  resources :posts
   resources :users
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 end

rails-blog/db/migrate/20170420184355_create_posts.rb

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+class CreatePosts < ActiveRecord::Migration[5.0]
+  def change
+    create_table :posts do |t|
+      t.text :title
+      t.text :body
+      t.references :user, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end

rails-blog/test/controllers/posts_controller_test.rb

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+require 'test_helper'
+
+class PostsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @post = posts(:one)
+  end
+
+  test "should get index" do
+    get posts_url
+    assert_response :success
+  end
+
+  test "should get new" do
+    get new_post_url
+    assert_response :success
+  end
+
+  test "should create post" do
+    assert_difference('Post.count') do
+      post posts_url, params: { post: { body: @post.body, title: @post.title, user_id: @post.user_id } }
+    end
+
+    assert_redirected_to post_url(Post.last)
+  end
+
+  test "should show post" do
+    get post_url(@post)
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get edit_post_url(@post)
+    assert_response :success
+  end
+
+  test "should update post" do
+    patch post_url(@post), params: { post: { body: @post.body, title: @post.title, user_id: @post.user_id } }
+    assert_redirected_to post_url(@post)
+  end
+
+  test "should destroy post" do
+    assert_difference('Post.count', -1) do
+      delete post_url(@post)
+    end
+
+    assert_redirected_to posts_url
+  end
+end

rails-blog/test/fixtures/posts.yml

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

rails-blog/test/models/post_test.rb

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