通过js实现删除功能 ruby on rails

（1）首先给删除按钮增加一个属性 remote: true,这样ujs将这个click动作转化为ajax调用，

 app/views/products/_product.html.erb

<tr id="product_<%= product.id %>">
  <td><%= link_to product.id, product_path(product) %></td>
  <td id="product_<%= product.id %>_name"><%= product.name %></td>
  <td id="product_<%= product.id %>_price"><%= number_to_currency product.price, unit: "¥" %></td>
  <td id="product_<%= product.id %>_description"><%= product.description %></td>
  <td><%=l product.created_at %></td>
  <td>
    <%= link_to t('.edit', :default => t("helpers.links.edit")),
      edit_product_path(product), :class => 'btn btn-default btn-xs editProductLink',
      remote: true, data: {type: 'json'} %>
      <%= link_to t('.destroy',
        :default => t("helpers.links.destroy")),
        product,
        :remote => true,
        :method => :delete,
        :data => { :confirm => t('.confirm', :default => t("helpers.links.confirm", :default => 'Are you sure?')) },
        :class => 'btn btn-xs btn-danger' %>
  </td>
</tr>

（2）在controller的destory方法里，增加接收js的请求代码

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

（3）新增文件app/views/products/destroy.js.erb，用的是fadeout方法，会渐变的将这一行隐藏掉。

$('#product_<%= @product.id %>').fadeOut();