ruby-on-rails - 在 ruby​​ on rails 中销毁客户/订单

Question

各位程序员大家好，我一直在研究订单管理系统。我终于解决了我所有的错误，除了一个我无法改正的错误。删除客户或订单后，我会收到一条错误消息，提示“路由错误”。

Routing Error No route matches [POST] "/customers/2"

Rails.root: /Users/cecil/Desktop/order_management_systeem

Application Trace | Framework Trace | Full Trace Routes

这是我的路线

           Prefix Verb   URI Pattern                                       Controller#Action
    customer_orders GET    /customers/:customer_id/orders(.:format)          orders#index
                    POST   /customers/:customer_id/orders(.:format)          orders#create
 new_customer_order GET    /customers/:customer_id/orders/new(.:format)      orders#new
edit_customer_order GET    /customers/:customer_id/orders/:id/edit(.:format) orders#edit
     customer_order GET    /customers/:customer_id/orders/:id(.:format)      orders#show
                    PATCH  /customers/:customer_id/orders/:id(.:format)      orders#update
                    PUT    /customers/:customer_id/orders/:id(.:format)      orders#update
                    DELETE /customers/:customer_id/orders/:id(.:format)      orders#destroy
          customers GET    /customers(.:format)                              customers#index
                    POST   /customers(.:format)                              customers#create
       new_customer GET    /customers/new(.:format)                          customers#new
      edit_customer GET    /customers/:id/edit(.:format)                     customers#edit
           customer GET    /customers/:id(.:format)                          customers#show
                    PATCH  /customers/:id(.:format)                          customers#update
                    PUT    /customers/:id(.:format)                          customers#update
                    DELETE /customers/:id(.:format)                          customers#destroy
                    GET    /:controller/:action/:id/:customer_id(.:format)   :controller#:action

这是我的erb代码

<%= link_to("Delete", customer_path(@customer), method: :delete, confirm: "Are you sure?", :class => 'action delete') %>

销毁 Controller

 def destroy
    customer = Customer.find(params[:id]).destroy 
    flash[:notice] = "Subject '#{customer.first_name}' destroyed successfully"
    redirect_to(:action => 'index')
  end

Answer 1

销毁操作应该类似于以下几行:

def destroy
  @customer = Customer.find(params[:id]
  @customer.destroy
  redirect_to(
    customers_path,
    notice: 'Customer successfully deleted'
  )
end

同时编辑链接:

<%= link_to("Delete", @customer, method: :delete, data: { confirm: "Are you sure?" }) %>

你的问题是，你已经定义了变量customer，但是在你的url_helper (customer_path(@customer)).

另一件事(更重要)是，您实际上为 客户 分配了一个值，这是从数据库中删除对象的结果:

customer = Customer.find(params[:id]).destroy

永远不要这样做。

要么做

Customer.find(params[:id]).destroy

或

@customer = Customer.find(params[:id])
@customer.destroy