Question

我有两个表类别，产品。产品具有外键类别。我正在尝试通过具有以下代码的产品通过index.html.erb删除（在视图中）：

<td><%= link_to 'Destroy', category_product_path(product), method: :delete, data: { confirm: 'Are you sure?' } %></td>

但是，所有这些操作都会留下以下错误：

No route matches [DELETE] "/categories/product/products"

首先，为什么我会收到此错误，在路线或耙路中的任何地方都没有'/ categories / product / products'网址？下面是rake route命令（省略了设计路线）：

category_products GET    /categories/:category_id/products(.:format)                                              products#index
                      POST   /categories/:category_id/products(.:format)                                              products#create
 new_category_product GET    /categories/:category_id/products/new(.:format)                                          products#new
edit_category_product GET    /categories/:category_id/products/:id/edit(.:format)                                     products#edit
     category_product GET    /categories/:category_id/products/:id(.:format)                                          products#show
                      PATCH  /categories/:category_id/products/:id(.:format)                                          products#update
                      PUT    /categories/:category_id/products/:id(.:format)                                          products#update
                      DELETE /categories/:category_id/products/:id(.:format)                                          products#destroy
           categories GET    /categories(.:format)                                                                    categories#index
                      POST   /categories(.:format)                                                                    categories#create
         new_category GET    /categories/new(.:format)                                                                categories#new
        edit_category GET    /categories/:id/edit(.:format)                                                           categories#edit
             category GET    /categories/:id(.:format)                                                                categories#show
                      PATCH  /categories/:id(.:format)                                                                categories#update
                      PUT    /categories/:id(.:format)                                                                categories#update
                      DELETE /categories/:id(.:format)                                                                categories#destroy
       categories_new GET    /categories/new(.:format)                                                                categories#new
                      POST   /categories/:id(.:format)                                                                categories#create
                      GET    /categories(.:format)                                                                    categories#index
                      DELETE /categories/:id(.:format)                                                                categories#destroy
                      GET    /categories/:id/products/new(.:format)                                                   products#new
                      POST   /categories/:id/products/:id(.:format)                                                   products#create
                      GET    /categories/:id/products(.:format)                                                       products#index
                      DELETE /categories/:id/products/:id(.:format)                                                   products#destroy

编辑：这是通过放置：

解决的

resources :categories do
  resources :products, shallow: true
end

routes.rb中的“删除”链接中仅允许“产品” ...

Answer 1

由于它是嵌套路线，因此您需要在路线中传递类别ID。喜欢：

<%= link_to 'Destroy', category_product_path(product, category_id: category.id), method: :delete, data: { confirm: 'Are you sure?' } %>

此处，在路线category_product_path(product, category_id: category.id)中，类别是产品所属的类别。

您还可以使用category_product_path(product, category_id: product.category.id)作为删除路线。

Answer 2

使用

resources :categories do
  resources :products, shallow: true

我能够只使用“产品”作为网址/路径

无法删除数据库和视图中的项目

2 个答案: