Question

好的，我已经问过类似的问题，但这是视图的问题。我已经使用form_玩了几个小时，不能完全正确。想知道是否有人可以指出obvioius错误...

/products/new.html.erb：

<h1>New Product</h1>

<%= form_for :product, as: :post, url: category_product_path(:product) do |form| %>
  <% if @product.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@product.errors.count, "error") %> prohibited this product from being saved:</h2>

      <ul>
      <% @product.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

 <div class="field">
   <%= form.label :name %>
   <%= form.text_field :name %>
 </div>

 <div class="field">
   <%= form.label :category_id %>
   <%= form.text_field :category_id %>
 </div>

 <div class="actions">
   <%= form.submit %>
 </div>
 <% end %>


 <%= link_to 'Back', category_products_path %>

和我的route.rb：

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

和错误消息：

ActionView::Template::Error (No route matches {:action=>"show", :category_id=>:product, :controller=>"products"}, missing required keys: [:id])

不是在迁移发生时创建的column：id-我有一个典型的迁移文件，其中包含t.string：name和t.text：description，仅此而已。

Answer 1

您的form_for网址错误。您应该使用指向products#create的路由，该路由还具有在表单中使用的POST动词

<%= form_for :product, as: :post, url: category_products_path do |form| %>

Rails 5.2 /products/new.html.erb在添加产品时遇到实际问题

1 个答案: