小编Bpa*_*rra的帖子

我正在进行一种拍卖/捐赠项目,我想改变产品的属性,这是一个表示产品已经捐赠的布尔值.

我现在这样做的方式如下:

视图:

<%= form_for(@product) do |f| %>

  <%= f.label "Are you sure you want to get this product?"%>
  <%= f.check_box :donated%>

  <%= f.submit "Receive!", class: "btn btn-large btn-primary" %>
 <% end %>

控制器:

   before_filter :signed_in_user, only: [:create, :destroy, :show, :index, :update]
   ...
   def update  
     @product.update_attributes(params[:product])
     flash[:success] = "Product donated!"
   end

路线:

resources :products, only: [:show, :create, :new, :update]

而且我得到了以下错误:

undefined method `update_attributes' for nil:NilClass

app/controllers/products_controller.rb:30:in `update'
Request

Parameters:

{"utf8"=>"?",
 "_method"=>"put",
 "authenticity_token"=>"M9q/qVcDmVIlEx+T5VFF0YtkYtzHRUCZLkPkDjc7MJc=",
 "product"=>{"donated"=>"1"},
 "commit"=>"Update product",
 "id"=>"1"}

我究竟做错了什么？感谢致敬.