更新产品实际上会破坏它

Question

我是 Rails 的新手，正在创建一个演示网上商店应用程序以供学习。我可以通过 rails 控制台和 url localhost:300/products/new 顺利地创建产品。我的问题是当我想更新它们时。我有 _form.html.erb 部分在 new.html.erb 和 edit.html.erb

中渲染

在 /products/id/edit 中，尽管按钮 "Update Product" 实际上是在销毁产品而不是更新它

这是_form.htlm.erb:

  <%= form_for(@product) do |f| %>
    <% 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="row">
    <div class="col-sm-4 col-xs-12">
        <div class="field">
                <%= f.label :name %><br>
                <%= f.text_field :name, :class => "input-group input-group-sm" %>
        </div>
        <div class="field">
                <%= f.label :description %><br>
                <%= f.text_area :description %>
        </div>
        <div class="field">
                <%= f.label :image_url %><br>
                <%= f.text_field :image_url %>
        </div>
        <div class="field">
                <%= f.label :color %><br>
                <%= f.text_field :color %>
        </div>
        <div class="actions">
                <%= f.submit %>
        </div>
    </div>
</div>

如果您需要更多数据，请告诉我谢谢，安娜

更新：下面是我的 routes.rb

Rails.application.routes.draw do
resources :products
get 'news/index' => 'news#index', as: :news
get 'store' => 'store#index', as: :store
get 'contact' => 'contact#index', as: :contact
get 'products/edit' => 'products#edit'
get 'products/destroy' => 'products#destroy'
get 'about' => 'about#index', as: :about
get 'landing_page' => 'static_pages#landing_page', as: :landing_page
get 'home/index'
root 'static_pages#landing_page'
resources :orders, only: [:index, :show, :create, :destroy]

我已经在 products_controller 中窥探并发现了这个：

# GET /products/1
# GET /products/1.json
 def show
 end
# GET /products/new
 def new
    @product = Product.new
 end

 # GET /products/1/edit
 def edit
 end

 # POST /products
 # POST /products.json
 def create
    @product = Product.new(product_params)

   respond_to do |format|
     if @product.save
       format.html { redirect_to @product, notice: 'Product was successfully created.' }
       format.json { render :show, status: :created, location: @product }
     else
       format.html { render :new }
       format.json { render json: @product.errors, status: :unprocessable_entity }
    end
  end
end

# PATCH/PUT /products/1
# PATCH/PUT /products/1.json
 def update
   respond_to do |format|
     if @product.update(product_params)
        format.html { redirect_to @product, notice: 'Product was successfully updated.' }
        format.json { render :show, status: :ok, location: @product }
     else
        format.html { render :edit }
        format.json { render json: @product.errors, status: :unprocessable_entity }
     end
   end
 end

# DELETE /products/1
# DELETE /products/1.json
def destroy
  @product.destroy
  respond_to do |format|
    format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' }
    format.json { head :no_content }
  end
end

Answer 1

Edit.html.erb 也有三个选项：显示|删除|返回删除选项编码为：<%= link_to 'Delete', @product.destroy % > 我删除了这一行，产品得到了编辑而不是被取消。

更新产品实际上会破坏它

Updating product actually destroys it

ruby-on-rails-3