teratail
回答率
85.30%
teratail header banner
teratail header banner
質問するログイン新規登録
トップに関する質問RailsでECサイトを作成中、商品をカートに追加しようとするとNoMethodError in CartsController#add_itemのエラーが出る

編集履歴

質問編集履歴

5

内容に変更があったため

2020/07/05 16:12

投稿

退会済みユーザー
title CHANGED
@@ -1,1 +1,1 @@
1
- RailsでECサイトを作成中、商品をカートに追加しようとするとActiveRecord::RecordNotFound in CartsController#add_itemのエラーが出る
1
+ RailsでECサイトを作成中、商品をカートに追加しようとするとNoMethodError in CartsController#add_itemのエラーが出る
body CHANGED
@@ -136,7 +136,7 @@
136
136
  if @product.save
137
137
  redirect_to root_path
138
138
  else
139
- render new_product_path
139
+ render @product.current_cart
140
140
  end
141
141
  end
142
142
 

4

変更があったため

2020/07/05 16:12

投稿

退会済みユーザー
title CHANGED
File without changes
body CHANGED
@@ -37,9 +37,9 @@
37
37
  #app/views/products/index.html.haml
38
38
  #トップページと商品の購入ページを兼ねています。
39
39
 
40
- %ul
40
+ %ul
41
- =form_for([@product, @cart_item], url: add_item_product_path, method: :post) do |f|
42
- - @products.each do |product|
41
+ - @products.each do |product|
42
+ =form_for([@product, @cart_item], url: add_item_product_path(product), method: :post) do |f|
43
43
  %li.product
44
44
  .pro-main
45
45
  .pro-left
@@ -67,11 +67,9 @@
67
67
  helper_method :current_cart
68
68
 
69
69
  def current_cart
70
- @cart =Cart.find(session[:cart_id])
70
+ @cart = Cart.find_by(id: session[:cart_id]) || Cart.create
71
- rescue ActiveRecord::RecordNotFound
72
- cart = Cart.create
73
- session[:cart_id] = cart.id
71
+ session[:cart_id] = @cart.id
74
- cart
72
+ @cart
75
73
  end
76
74
  ```
77
75
  ```
@@ -86,11 +84,11 @@
86
84
 
87
85
  def add_item
88
86
  @cart = current_cart
89
- @product =Product.find(params[:product_id])
87
+ @product =Product.find(params[:id])
90
88
  @cart_items = @cart.cart_items.build
91
89
 
92
90
  if @cart_item.blank?
93
- @cart_item = current_cart.cart_items.build(product_id: params[:product_id], cart_id: current_cart.id)
91
+ @cart_item = current_cart.cart_items.build(product_id: params[:id], cart_id: current_cart.id)
94
92
  end
95
93
 
96
94
  @cart_items.quantity += params[:quantity].to_i
@@ -126,7 +124,6 @@
126
124
 
127
125
  def index
128
126
  @products = Product.all
129
- @product = CartItem.new
130
127
  @cart_item = CartItem.new
131
128
  end
132
129
 
@@ -180,7 +177,7 @@
180
177
  end
181
178
  ```
182
179
  ```
183
- Prefix Verb URI Pattern Controller#Action
180
+ Prefix Verb URI Pattern Controller#Action
184
181
  new_user_session GET /users/sign_in(.:format) users/sessions#new
185
182
  user_session POST /users/sign_in(.:format) users/sessions#create
186
183
  destroy_user_session DELETE /users/sign_out(.:format) users/sessions#destroy
@@ -201,6 +198,7 @@
201
198
  root GET / products#index
202
199
  product_carts POST /products/:product_id/carts(.:format) carts#create
203
200
  new_product_cart GET /products/:product_id/carts/new(.:format) carts#new
201
+ product_cart GET /products/:product_id/carts/:id(.:format) carts#show
204
202
  add_item_product POST /products/:id/add_item(.:format) carts#add_item
205
203
  update_item_product POST /products/:id/update_item(.:format) carts#update_item
206
204
  delete_item_product DELETE /products/:id/delete_item(.:format) carts#delete_item
@@ -214,9 +212,6 @@
214
212
  user GET /users/:id(.:format) users#show
215
213
  PATCH /users/:id(.:format) users#update
216
214
  PUT /users/:id(.:format) users#update
217
- carts POST /carts(.:format) carts#create
218
- new_cart GET /carts/new(.:format) carts#new
219
- cart GET /carts/:id(.:format) carts#show
220
215
  ```
221
216
 
222
217
 

3

変更があったため

2020/07/05 14:56

投稿

退会済みユーザー
title CHANGED
File without changes
body CHANGED
@@ -21,7 +21,7 @@
21
21
 
22
22
  resources :products, only: [:index, :new, :create, :edit, :update] do
23
23
  resources :carts, only: [:create, :new]
24
- collection do
24
+ member do
25
25
  post '/add_item' => 'carts#add_item'
26
26
  post '/update_item' => 'carts#update_item'
27
27
  delete '/delete_item' => 'carts#delete_item'
@@ -37,27 +37,25 @@
37
37
  #app/views/products/index.html.haml
38
38
  #トップページと商品の購入ページを兼ねています。
39
39
 
40
- %ul
40
+ %ul
41
+ =form_for([@product, @cart_item], url: add_item_product_path, method: :post) do |f|
41
- - @products.each do |product|
42
+ - @products.each do |product|
42
- %li.product
43
+ %li.product
43
- .pro-main
44
+ .pro-main
44
- .pro-left
45
+ .pro-left
45
- .pro-image
46
+ .pro-image
46
- = image_tag product.image.url, height: "120"
47
+ = image_tag product.image.url, height: "120"
47
- .pro-name
48
+ .pro-name
48
- = product.name
49
+ = product.name
49
- .pro-center
50
+ .pro-center
50
- .pro-explain
51
+ .pro-explain
51
- = product.explain
52
+ = product.explain
52
- .pro-right
53
+ .pro-right
53
- .pro-price
54
+ .pro-price
54
- = product.price
55
+ = product.price
55
- %span
56
+ %span
56
- 円
57
+ 円
57
- #以下フォーム
58
- =form_for([@product, @cart_item], url: add_item_products_path, method: :post) do |f|
59
- =f.hidden_field :product_id, value: @product.id
58
+ =f.hidden_field :product_id, value: product.id
60
- /=f.hidden_field :cart_id, value: @cart.id
61
59
  .pro-qua
62
60
  = f.number_field :quantity, value: "0", style: "text-align:right", min: 0, class: "pro-quantity"
63
61
  .pro-cart

2

変更があったため

2020/07/05 08:26

投稿

退会済みユーザー
title CHANGED
File without changes
body CHANGED
@@ -203,9 +203,9 @@
203
203
  root GET / products#index
204
204
  product_carts POST /products/:product_id/carts(.:format) carts#create
205
205
  new_product_cart GET /products/:product_id/carts/new(.:format) carts#new
206
- add_item_products POST /products/add_item(.:format) carts#add_item
206
+ add_item_product POST /products/:id/add_item(.:format) carts#add_item
207
- update_item_products POST /products/update_item(.:format) carts#update_item
207
+ update_item_product POST /products/:id/update_item(.:format) carts#update_item
208
- delete_item_products DELETE /products/delete_item(.:format) carts#delete_item
208
+ delete_item_product DELETE /products/:id/delete_item(.:format) carts#delete_item
209
209
  products GET /products(.:format) products#index
210
210
  POST /products(.:format) products#create
211
211
  new_product GET /products/new(.:format) products#new

1

ルーティングを載せるため

2020/07/05 08:18

投稿

退会済みユーザー
title CHANGED
File without changes
body CHANGED
@@ -181,6 +181,45 @@
181
181
  has_one :cart, dependent: :destroy
182
182
  end
183
183
  ```
184
+ ```
185
+ Prefix Verb URI Pattern Controller#Action
186
+ new_user_session GET /users/sign_in(.:format) users/sessions#new
187
+ user_session POST /users/sign_in(.:format) users/sessions#create
188
+ destroy_user_session DELETE /users/sign_out(.:format) users/sessions#destroy
189
+ new_user_password GET /users/password/new(.:format) devise/passwords#new
190
+ edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
191
+ user_password PATCH /users/password(.:format) devise/passwords#update
192
+ PUT /users/password(.:format) devise/passwords#update
193
+ POST /users/password(.:format) devise/passwords#create
194
+ cancel_user_registration GET /users/cancel(.:format) users/registrations#cancel
195
+ new_user_registration GET /users/sign_up(.:format) users/registrations#new
196
+ edit_user_registration GET /users/edit(.:format) users/registrations#edit
197
+ user_registration PATCH /users(.:format) users/registrations#update
198
+ PUT /users(.:format) users/registrations#update
199
+ DELETE /users(.:format) users/registrations#destroy
200
+ POST /users(.:format) users/registrations#create
201
+ sign_in GET /sign_in(.:format) users/sessions#new
202
+ sign_out GET /sign_out(.:format) users/sessions#destroy
203
+ root GET / products#index
204
+ product_carts POST /products/:product_id/carts(.:format) carts#create
205
+ new_product_cart GET /products/:product_id/carts/new(.:format) carts#new
206
+ add_item_products POST /products/add_item(.:format) carts#add_item
207
+ update_item_products POST /products/update_item(.:format) carts#update_item
208
+ delete_item_products DELETE /products/delete_item(.:format) carts#delete_item
209
+ products GET /products(.:format) products#index
210
+ POST /products(.:format) products#create
211
+ new_product GET /products/new(.:format) products#new
212
+ edit_product GET /products/:id/edit(.:format) products#edit
213
+ product PATCH /products/:id(.:format) products#update
214
+ PUT /products/:id(.:format) products#update
215
+ edit_user GET /users/:id/edit(.:format) users#edit
216
+ user GET /users/:id(.:format) users#show
217
+ PATCH /users/:id(.:format) users#update
218
+ PUT /users/:id(.:format) users#update
219
+ carts POST /carts(.:format) carts#create
220
+ new_cart GET /carts/new(.:format) carts#new
221
+ cart GET /carts/:id(.:format) carts#show
222
+ ```
184
223
 
185
224
 
186
225