Add posts model

app/controllers/posts_controller.rb

@@ -0,0 +1,70 @@
+class PostsController < ApplicationController
+  before_action :set_post, only: %i[ show edit update destroy ]
+
+  # GET /posts or /posts.json
+  def index
+    @posts = Post.all
+  end
+
+  # GET /posts/1 or /posts/1.json
+  def show
+  end
+
+  # GET /posts/new
+  def new
+    @post = Post.new
+  end
+
+  # GET /posts/1/edit
+  def edit
+  end
+
+  # POST /posts or /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, status: :unprocessable_entity }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /posts/1 or /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, status: :unprocessable_entity }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /posts/1 or /posts/1.json
+  def destroy
+    @post.destroy!
+
+    respond_to do |format|
+      format.html { redirect_to posts_path, status: :see_other, 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.expect(:id))
+    end
+
+    # Only allow a list of trusted parameters through.
+    def post_params
+      params.expect(post: [ :title, :body ])
+    end
+end

app/helpers/posts_helper.rb

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

app/models/post.rb

@@ -0,0 +1,2 @@
+class Post < ApplicationRecord
+end

app/views/posts/_form.html.erb

@@ -0,0 +1,27 @@
+<%= form_with(model: post, class: "contents") do |form| %>
+  <% if post.errors.any? %>
+    <div id="error_explanation" class="bg-red-50 text-red-500 px-3 py-2 font-medium rounded-lg mt-3">
+      <h2><%= pluralize(post.errors.count, "error") %> prohibited this post from being saved:</h2>
+
+      <ul>
+        <% post.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="my-5">
+    <%= form.label :title %>
+    <%= form.text_field :title, class: "block shadow rounded-md border border-gray-400 outline-none px-3 py-2 mt-2 w-full" %>
+  </div>
+
+  <div class="my-5">
+    <%= form.label :body %>
+    <%= form.textarea :body, rows: 4, class: "block shadow rounded-md border border-gray-400 outline-none px-3 py-2 mt-2 w-full" %>
+  </div>
+
+  <div class="inline">
+    <%= form.submit class: "rounded-lg py-3 px-5 bg-blue-600 text-white inline-block font-medium cursor-pointer" %>
+  </div>
+<% end %>

app/views/posts/_post.html.erb

@@ -0,0 +1,12 @@
+<div id="<%= dom_id post %>">
+  <p class="my-5">
+    <strong class="block font-medium mb-1">Title:</strong>
+    <%= post.title %>
+  </p>
+
+  <p class="my-5">
+    <strong class="block font-medium mb-1">Body:</strong>
+    <%= post.body %>
+  </p>
+
+</div>

app/views/posts/_post.json.jbuilder

@@ -0,0 +1,2 @@
+json.extract! post, :id, :title, :body, :created_at, :updated_at
+json.url post_url(post, format: :json)

app/views/posts/edit.html.erb

@@ -0,0 +1,8 @@
+<div class="mx-auto md:w-2/3 w-full">
+  <h1 class="font-bold text-4xl">Editing post</h1>
+
+  <%= render "form", post: @post %>
+
+  <%= link_to "Show this post", @post, class: "ml-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+  <%= link_to "Back to posts", posts_path, class: "ml-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+</div>

app/views/posts/index.html.erb

@@ -0,0 +1,21 @@
+<div class="w-full">
+  <% if notice.present? %>
+    <p class="py-2 px-3 bg-green-50 mb-5 text-green-500 font-medium rounded-lg inline-block" id="notice"><%= notice %></p>
+  <% end %>
+
+  <% content_for :title, "Posts" %>
+
+  <div class="flex justify-between items-center">
+    <h1 class="font-bold text-4xl">Posts</h1>
+    <%= link_to "New post", new_post_path, class: "rounded-lg py-3 px-5 bg-blue-600 text-white block font-medium" %>
+  </div>
+
+  <div id="posts" class="min-w-full">
+    <% @posts.each do |post| %>
+      <%= render post %>
+      <p>
+        <%= link_to "Show this post", post, class: "ml-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+      </p>
+    <% end %>
+  </div>
+</div>

app/views/posts/index.json.jbuilder

@@ -0,0 +1 @@
+json.array! @posts, partial: "posts/post", as: :post

app/views/posts/new.html.erb

@@ -0,0 +1,7 @@
+<div class="mx-auto md:w-2/3 w-full">
+  <h1 class="font-bold text-4xl">New post</h1>
+
+  <%= render "form", post: @post %>
+
+  <%= link_to "Back to posts", posts_path, class: "ml-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+</div>

app/views/posts/show.html.erb

@@ -0,0 +1,15 @@
+<div class="mx-auto md:w-2/3 w-full flex">
+  <div class="mx-auto">
+    <% if notice.present? %>
+      <p class="py-2 px-3 bg-green-50 mb-5 text-green-500 font-medium rounded-lg inline-block" id="notice"><%= notice %></p>
+    <% end %>
+
+    <%= render @post %>
+
+    <%= link_to "Edit this post", edit_post_path(@post), class: "mt-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+    <%= link_to "Back to posts", posts_path, class: "ml-2 rounded-lg py-3 px-5 bg-gray-100 inline-block font-medium" %>
+    <div class="inline-block ml-2">
+      <%= button_to "Destroy this post", @post, method: :delete, class: "mt-2 rounded-lg py-3 px-5 bg-gray-100 font-medium" %>
+    </div>
+  </div>
+</div>

app/views/posts/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! "posts/post", post: @post

config/routes.rb

@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
+  resources :posts
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.
@@ -10,5 +11,5 @@
   # get "service-worker" => "rails/pwa#service_worker", as: :pwa_service_worker
 
   # Defines the root path route ("/")
-  # root "posts#index"
+  root "posts#index"
 end

db/migrate/20241214052849_create_posts.rb

@@ -0,0 +1,10 @@
+class CreatePosts < ActiveRecord::Migration[8.0]
+  def change
+    create_table :posts do |t|
+      t.string :title
+      t.text :body
+
+      t.timestamps
+    end
+  end
+end

test/controllers/posts_controller_test.rb

@@ -0,0 +1,48 @@
+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 } }
+    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 } }
+    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

test/fixtures/posts.yml

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

test/models/post_test.rb

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

test/system/posts_test.rb

@@ -0,0 +1,43 @@
+require "application_system_test_case"
+
+class PostsTest < ApplicationSystemTestCase
+  setup do
+    @post = posts(:one)
+  end
+
+  test "visiting the index" do
+    visit posts_url
+    assert_selector "h1", text: "Posts"
+  end
+
+  test "should create post" do
+    visit posts_url
+    click_on "New post"
+
+    fill_in "Body", with: @post.body
+    fill_in "Title", with: @post.title
+    click_on "Create Post"
+
+    assert_text "Post was successfully created"
+    click_on "Back"
+  end
+
+  test "should update Post" do
+    visit post_url(@post)
+    click_on "Edit this post", match: :first
+
+    fill_in "Body", with: @post.body
+    fill_in "Title", with: @post.title
+    click_on "Update Post"
+
+    assert_text "Post was successfully updated"
+    click_on "Back"
+  end
+
+  test "should destroy Post" do
+    visit post_url(@post)
+    click_on "Destroy this post", match: :first
+
+    assert_text "Post was successfully destroyed"
+  end
+end