CI確認用

.rubocop.yml

@@ -23,3 +23,4 @@ Layout/LineLength:
 Hc/RailsSpecificActionName:
   Exclude:
     - app/controllers/users/omniauth_callbacks_controller.rb
+    - app/controllers/promotion_codes_controller.rb

app/controllers/admin/orders_controller.rb

@@ -9,7 +9,8 @@ def index
     def show
       @order = Order.find(params[:id])
       @ordered_cart_products = @order.cart.cart_products.order(created_at: :desc)
-      @total = @ordered_cart_products.inject(0) { |total, cart_product| total + cart_product.subtotal }
+      @promotion_code = @order.cart.promotion_code
+      @total = @order.cart.calc_total
     end
   end
 end

app/controllers/cart_products_controller.rb

@@ -3,11 +3,6 @@
 class CartProductsController < ApplicationController
   before_action :set_cart
 
-  def index
-    @cart_products = Cart.find(@cart.id).cart_products.order(created_at: :desc)
-    @total = @cart_products.inject(0) { |total, cart_product| total + cart_product.subtotal }
-  end
-
   def create
     product_id = params[:product_id]
     quantity = params[:quantity].to_i
@@ -23,7 +18,8 @@ def create
   end
 
   def destroy
-    CartProduct.find(params[:id]).destroy
-    redirect_to request.referer
+    cart_product = CartProduct.find(params[:id])
+    cart_product.destroy
+    redirect_to request.referer, flash: { success: "#{cart_product.product.name}を削除しました。" }
   end
 end

app/controllers/orders_controller.rb

@@ -2,6 +2,7 @@
 
 class OrdersController < ApplicationController
   before_action :set_cart
+  before_action :set_promotion_code, only: %i[index create]
   before_action :set_cart_products, only: %i[index create]
 
   def index
@@ -14,14 +15,16 @@ def create
 
     error_messages = @cart.set_validate_error_messages
     if error_messages.size.positive?
-      flash.now['danger'] = error_messages.join('<br/>')
+      flash.now[:danger] = error_messages.join('<br/>')
       render :index
       return
     end
 
     if @order.save
       session[:cart_id] = nil
-      flash[:success] = '購入ありがとうございます'
+      flash[:success] = '購入ありがとうございます。'
+      # Modelのselfはシリアライズされるためメール送信はコントローラに記載
+      OrderMailer.complete(order: @order).deliver_later
       redirect_to products_path
     else
       render :index
@@ -35,8 +38,12 @@ def order_params
                                      credit_name credit_number credit_expiration credit_cvv])
   end
 
+  def set_promotion_code
+    @promotion_code = @cart.promotion_code
+  end
+
   def set_cart_products
     @cart_products = @cart.cart_products.order(created_at: :desc)
-    @total = @cart_products.inject(0) { |total, cart_product| total + cart_product.subtotal }
+    @total = @cart.calc_total
   end
 end

app/controllers/promotion_codes_controller.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+class PromotionCodesController < ApplicationController
+  before_action :set_cart
+
+  def register
+    if params[:code].empty?
+      redirect_to request.referer, flash: { danger: 'コードを入力してください' }
+      return
+    end
+
+    code = params[:code]
+    promotion_code = PromotionCode.find_by(code:, order_id: nil)
+
+    if promotion_code
+      Cart.update(@cart.id, promotion_code_id: promotion_code.id)
+      redirect_to request.referer, flash: { success: 'プロモーションコードを登録しました。' }
+    else
+      redirect_to request.referer, flash: { danger: '入力したコードが間違っているか、すでに使用済です。' }
+    end
+  end
+
+  def cancel
+    Cart.update(@cart.id, promotion_code_id: nil)
+    redirect_to request.referer, flash: { success: 'プロモーションコードを解除しました。' }
+  end
+
+  private
+
+  def promotion_code_params
+    params.require(:promotion_code).permit(%i[code])
+  end
+end

app/mailers/order_mailer.rb

@@ -7,7 +7,8 @@ def complete(order:)
     @order = order
     recipient = @order.email
     @ordered_cart_products = @order.cart.cart_products.order(created_at: :desc)
-    @total = @ordered_cart_products.inject(0) { |total, cart_product| total + cart_product.subtotal }
+    @promotion_code = @order.cart.promotion_code
+    @total = @order.cart.calc_total
     mail(to: recipient, subject: '注文内容ご確認')
   end
 end

app/models/cart.rb

@@ -3,17 +3,13 @@
 class Cart < ApplicationRecord
   has_many :cart_products, dependent: :destroy
   has_many :products, through: :cart_products
+  belongs_to :promotion_code, optional: true
 
   def set_validate_error_messages
     messages = []
     messages << 'カートに商品が入っていません。' if cart_products.empty?
-
-    cart_products
-      .select { |cart_product| cart_product.quantity > cart_product.product.stock }
-      .map do |cart_product|
-        product = cart_product.product
-        messages << "#{product.name}が注文可能数を超えています。最大注文可能数：#{product.stock}個"
-      end
+    messages << 'プロモーションコードがすでに使用済です。' if promotion_code&.order_id.present?
+    set_out_of_stock_messages(messages:)
 
     messages
   end
@@ -24,4 +20,24 @@ def decrease_product_stock
       Product.update(cart_product.product.id, stock: cart_product.product.stock - quantity)
     end
   end
+
+  def calc_total
+    total = cart_products.inject(0) { |result, cart_product| result + cart_product.subtotal }
+    if promotion_code
+      total -= promotion_code.discount
+      total = 0 if total.negative?
+    end
+    total
+  end
+
+  private
+
+  def set_out_of_stock_messages(messages:)
+    cart_products
+      .select { |cart_product| cart_product.quantity > cart_product.product.stock }
+      .map do |cart_product|
+        product = cart_product.product
+        messages << "#{product.name}が注文可能数を超えています。最大注文可能数：#{product.stock}個"
+      end
+  end
 end

app/models/order.rb

@@ -21,6 +21,18 @@ class Order < ApplicationRecord
 
   before_create do
     cart.decrease_product_stock
-    OrderMailer.complete(order: @order).deliver_later
+  end
+
+  after_create do
+    update_promotion_code
+  end
+
+  private
+
+  def update_promotion_code
+    promotion_code = cart.promotion_code
+    return unless promotion_code && promotion_code.order_id.nil?
+
+    PromotionCode.update(promotion_code.id, order_id: id)
   end
 end

app/models/promotion_code.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+class PromotionCode < ApplicationRecord
+  belongs_to :order, optional: true
+  has_many :carts, dependent: :nullify
+end

app/views/admin/orders/show.html.erb

@@ -13,7 +13,7 @@
     <p class="lead">名義：<%= @order.credit_name %></p>
     <p class="lead">有効期限：<%= @order.credit_expiration %></p>
   </div>
-  <%= render 'shared/ordered_cart_products', :ordered_cart_products => @ordered_cart_products, :total => @total %>
+  <%= render 'shared/ordered_cart_products', :ordered_cart_products => @ordered_cart_products, :total => @total, :promotion_code => @promotion_code %>
 </div>
 <!-- Footer-->
 <footer class="py-5 bg-dark">

app/views/order_mailer/complete.html.erb

@@ -6,5 +6,5 @@
     <h1 class="display-5 fw-bolder"><%= "#{@order.last_name} #{@order.first_name}様" %></h1>
     <p>ご購入ありがとうございます。購入明細をお送りいたしますので、下記内容にてご確認ください。</p>
   </div>
-  <%= render 'shared/ordered_cart_products', :ordered_cart_products => @ordered_cart_products, :total => @total %>
+  <%= render 'shared/ordered_cart_products', :ordered_cart_products => @ordered_cart_products, :total => @total, :promotion_code => @promotion_code %>
 </div>

app/views/orders/index.html.erb

@@ -32,29 +32,31 @@
               </div>
             </li>
           <% end %>
-          <li class="list-group-item d-flex justify-content-between bg-body-tertiary">
-            <div class="text-success">
-              <h6 class="my-0">プロモコード</h6>
-              <small>DF97M2D</small>
-            </div>
-            <div>
-              <span class="text-success">−0円</span>
-              <%= link_to orders_path, data: {"turbo-method": :delete }, class: "btn btn-outline-danger" do %>
-                <i class="bi-trash"></i>
-              <% end %>
-            </div>
-          </li>
+          <% if @promotion_code %>
+            <li class="list-group-item d-flex justify-content-between bg-body-tertiary">
+              <div class="text-success">
+                <h6 class="my-0">プロモコード</h6>
+                <small><%= @promotion_code.code %></small>
+              </div>
+              <div>
+                <span class="text-success">-<%= convert_to_jpy(@promotion_code.discount)%></span>
+                <%= link_to cancel_promotion_code_path, data: {"turbo-method": :post }, class: "btn btn-outline-danger" do %>
+                  <i class="bi-trash"></i>
+                <% end %>
+              </div>
+            </li>
+          <% end %>
           <li class="list-group-item d-flex justify-content-between">
             <span>お支払い金額</span>
             <strong><%= convert_to_jpy(@total) %></strong>
           </li>
         </ul>
-        <form class="card p-2">
+        <%= form_with url: register_promotion_code_path, method: :post, data: { turbo: false }, class: "card p-2" do |f| %>
           <div class="input-group">
-            <input type="text" class="form-control" placeholder="プロモコードを入力">
-            <button class="btn btn-secondary">利用する</button>
+            <%= f.text_field :code, class: "form-control", placeholder: "プロモコードを入力" %>
+            <button class="btn btn-secondary" type="submit">利用する</button>
           </div>
-        </form>
+        <% end %>
       </div>
       <div class="col-md-7 col-lg-6">
         <h4 class="mb-3">お届け先情報</h4>

app/views/shared/_ordered_cart_products.html.erb

@@ -19,11 +19,20 @@
           <td class="text-end"><%= convert_to_jpy(cart_product.subtotal) %></td>
         </tr>
       <% end %>
+      <% if promotion_code %>
+        <tr>
+          <th scope="row" class="text-success">プロモーションコード</th>
+          <td class="text-success">コード：<%= promotion_code.code %></td>
+          <td class="text-end text-success">-<%= convert_to_jpy(promotion_code.discount) %></td>
+          <td class="text-end text-success">1</td>
+          <td class="text-end text-success">-<%= convert_to_jpy(promotion_code.discount) %></td>
+        </tr>
+      <% end %>
       <tr>
         <th></th>
         <td></td>
         <td></td>
-        <td><strong>合計金額</strong></td>
+        <td class="text-end"><strong>合計金額</strong></td>
         <td class="text-end"><%= convert_to_jpy(total) %></td>
       </tr>
     </tbody>

config/routes.rb

@@ -10,6 +10,9 @@
   resources :orders, only: %i[index create]
   root 'products#index'
 
+  post 'register_promotion_code', to: 'promotion_codes#register'
+  post 'cancel_promotion_code', to: 'promotion_codes#cancel'
+
   # ルーティングが存在しないパスへアクセスしたとき、ルートへリダイレクトする。
   # この際、'rails/active_storage'が含まれているパスはリダイレクト対象外にする
   get '*path', to: redirect('/'), constraints: ->(req) { req.path.exclude? 'rails/active_storage' }

db/migrate/20230912091841_create_promotion_codes.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class CreatePromotionCodes < ActiveRecord::Migration[7.0]
+  def change
+    create_table :promotion_codes do |t|
+      t.string :code, null: false
+      t.integer :discount, null: false
+      t.references :order, null: true, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20230912130015_add_references_to_carts.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddReferencesToCarts < ActiveRecord::Migration[7.0]
+  def change
+    add_reference :carts, :promotion_code, null: true, foreign_key: true
+  end
+end

lib/tasks/promotion_code.rake

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+namespace :promotion_code do
+  task generate: :environment do
+    10.times do
+      code = SecureRandom.alphanumeric(7)
+      discount = rand(1..10) * 100
+      PromotionCode.create(code:, discount:)
+      puts "コード #{code} で#{discount}円割引"
+    end
+  end
+end

spec/models/promotion_code_spec.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe PromotionCode, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/requests/promotion_codes_spec.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'PromotionCodes', type: :request do
+  describe 'GET /index' do
+    pending "add some examples (or delete) #{__FILE__}"
+  end
+end