ruby-on-rails – 在我的新Rails应用程序中工作/显示的图像

更新：o.k.这很奇怪,在浏览器中,我可以访问localhost：3000 / assets / images / rails.png中的图像,但是当我将该路径放入seeds.rb文件然后加载页面时,它显示它正在尝试查找/assets/rails.png中的图像,即它正在跳过图像文件夹…任何想法？

是否可以将rails配置到某个位置以仅查看两个文件夹？

我正在使用一本名为Agile web Development with Rails的书来学习如何使用框架,但似乎有一些细微的差别.它为rails 3.0和3.1提供了代码(我正在使用后者)但它并不总是按预期工作.到目前为止,我们已经为Products类创建了scaffolding,并使用seeds.rb将一些数据放入sqlite3数据库中.每个“产品”的assets / images文件夹中都有图像,但它没有显示.
我在seeds.rb文件中试验了图像的路径,但它没有用.

图像位于app / assets / images文件夹中

我将向您展示以下文件,所有这些文件都以某种方式处理图像

1.app/views/products/_form.html.erb
2.app/views/products/index.html.erb
3. db / seeds.rb

更新：在日志文件中,它表示图像存在路由错误.

Started GET "/assets/wd4d.jpg" for 127.0.0.1 at Tue Sep 27 11:01:43 -0400 2011
Served asset /wd4d.jpg - 404 Not Found (3ms)

ActionController::RoutingError (No route matches [GET] "/assets/wd4d.jpg"):


Rendered /Library/Ruby/Gems/1.8/gems/actionpack-3.1.0/lib/action_dispatch/middleware/templates/rescues/routing_error.erb within rescues/layout (0.5ms)


Started GET "/images/ruby.jpg" for 127.0.0.1 at Tue Sep 27 11:01:43 -0400 2011

ActionController::RoutingError (No route matches [GET] "/images/ruby.jpg"):

应用程序/视图/产品/ _form.html.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 |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :title %><br />
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :description %><br />
    <%= f.text_area :description,:rows => 6 %>
  </div>
  <div class="field">
    <%= f.label :image_url %><br />
    <%= f.text_field :image_url %>
  </div>
  <div class="field">
    <%= f.label :price %><br />
    <%= f.text_field :price %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

2.app/views/products/index.html.erb

<h1>Listing products</h1>

<table>
<% @products.each do |product| %>
  <tr class="<%= cycle('list_line_odd','list_line_even') %>">

    <td>
      <%= image_tag(product.image_url,:class => 'list_image') %>
    </td>

    <td class="list_description">
      <dl>
        <dt><%= product.title %></dt>
        <dd><%= truncate(strip_tags(product.description),:truncate => 80) %></dd>
      </dl>
    </td>

    <td class="list_actions">
      <%= link_to 'Show',product %><br/>
      <%= link_to 'Edit',edit_product_path(product) %><br/>
      <%= link_to 'Destroy',product,:confirm => 'Are you sure?',:method => :delete %>
    </td>
  </tr>
<% end %>
</table>

<br />

<%= link_to 'New product',new_product_path %>

> 3. db / seeds.rb(注意我在这里尝试了图片网址)

Product.delete_all
Product.create(：title =>’开发人员的网页设计’,
??：description =>
????％{
????????等等等等
??????},
??：image_url => ‘wd4d.jpg’,
??：price => 42.95)

. . .

Product.create(：title =>’Programming Ruby 1.9′,
??：description =>
????％{
????????等等等等.
??????},
??：image_url => ‘/images/ruby.jpg’,
??：price => 49.50)

. . .

Product.create(：title =>’Rails Test Prescriptions’,
??：image_url => ‘/images/rtp.jpg’,
??：price => 43.75)