使用回形针插件通过get方法无法通过文件系统找到图像路径

Question

经过很大的困难，我想我终于能够找到适合我项目配置的回形针 git 提交，即 Ruby 1.8.7 和 Rails 2.0.2。

在将回形针集成到我的项目中之前，我正在尝试实现 POC。 POC 基本上是在每个帖子旁边都有适当的图像来实现。它似乎很有效，只是当它尝试获取图像时，它当前显示路由错误。我能够在数据库中看到适当的反射，显示图像已与帖子消息一起插入。实际上，我在 Rails 应用程序中可以看到正在存储的图像.. 根据回形针使用的默认 url 将图像存储在文件系统中。

但我无法理解为什么它无法使用相同的 url 来获取图像并显示相同的图像。我基本上已经使用rails脚手架实现了这个POC，并做了一些适当的更改。

路由错误谈到使用 get 方法，我无法理解 get 方法在获取图像中起什么作用，我的控制器中没有任何此类方法。 在这种情况下，有些东西似乎很可疑..请告诉我同样的图像应该如何获取和显示..如果我在某些地方做错了..请同样纠正我..

我会喜欢添加...在我的应用程序的根目录中创建一个照片目录，其中有一个目录，每次添加带有适当图像上传的新帖子时都会创建一个目录。该目录名称由 id 组成，唯一标识其中的每个图像。实际的目录结构是这样的：-

rail_app_directory/photo/id_number/orginal/photo_filename.appropriate_file_format

更直接的例如上面发布的一般结构：- post_with_image/photo/1/original/sunset.jpeg

请在下面找到控制器的代码，以防万一：-

class PostsController < ApplicationController
  # GET /posts
  # GET /posts.xml
  def index
    @posts = Post.find(:all)

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @posts }
    end
  end

  # GET /posts/1
  # GET /posts/1.xml
  def show
    @post = Post.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @post }
    end
  end

  # GET /posts/new
  # GET /posts/new.xml
  def new
    @post = Post.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @post }
    end
  end

  # GET /posts/1/edit
  def edit
    @post = Post.find(params[:id])
  end

  # POST /posts
  # POST /posts.xml
  def create
    @post = Post.new(params[:post])

    respond_to do |format|
      if @post.save
        flash[:notice] = 'Post was successfully created.'
        format.html { redirect_to(@post) }
        format.xml  { render :xml => @post, :status => :created, :location => @post }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @post.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /posts/1
  # PUT /posts/1.xml
  def update
    @post = Post.find(params[:id])

    respond_to do |format|
      if @post.update_attributes(params[:post])
        flash[:notice] = 'Post was successfully updated.'
        format.html { redirect_to(@post) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @post.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /posts/1
  # DELETE /posts/1.xml
  def destroy
    @post = Post.find(params[:id])
    @post.destroy

    respond_to do |format|
      format.html { redirect_to(posts_url) }
      format.xml  { head :ok }
    end
  end
end

请找到我的 index.html.erb 文件的代码：-

<h1>Listing posts</h1>

<table>
  <tr>
    <th>Message</th>
  </tr><br/>
</table>
<% for post in @posts %>
  <%= image_tag post.photo.url %>
  <table>
    <tr><td><%=h post.message %></td></tr>
    <tr><td><%= link_to 'Show', post %></td>
    <td><%= link_to 'Edit', edit_post_path(post) %></td>
    <td><%= link_to 'Destroy', post, :confirm => 'Are you sure?', :method => :delete %></td></tr>
    </table>
  <br/>  <hr/>
<% end %>



<br />

<%= link_to 'New post', new_post_path %>

这就是我所做的 tail -f log/development.log

ActionController::RoutingError (No route matches "/photo/4/original/ruby-on-rails.jpg" with {:method=>:get}):
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1441:in `recognize_path'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1424:in `recognize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:170:in `handle_request'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in `dispatch'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:76:in `process'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in `synchronize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in `process'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `process_client'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `initialize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `new'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `initialize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `new'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `each'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/command.rb:212:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/mongrel_rails:281
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:64
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.0.2/lib/commands/server.rb:39
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    script/server:3

Rendering /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/templates/rescues/layout.erb (not_found)


Processing ApplicationController#index (for 127.0.0.1 at 2011-05-19 19:12:01) [GET]
  Session ID: BAh7ByIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo%0ASGFzaHsABjoKQHVzZWR7ADoMY3NyZl9pZCIlZWVhYzk4NzczZDNjZDI4ZmY0%0ANzQ0NTU0NGU2YWJkMjk%3D--b8294cd9465ee6ac96f69b34362e3044138f3ee2
  Parameters: {}


ActionController::RoutingError (No route matches "/photo/5/original/Water%20lilies.jpg" with {:method=>:get}):
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1441:in `recognize_path'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1424:in `recognize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:170:in `handle_request'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in `dispatch'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:76:in `process'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in `synchronize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in `process'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `process_client'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `initialize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `new'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `initialize'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `new'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `each'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/lib/mongrel/command.rb:212:in `run'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/mongrel-1.1.5/bin/mongrel_rails:281
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:64
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.0.2/lib/commands/server.rb:39
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /home/mohnish/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    script/server:3

Rendering /home/mohnish/.rvm/gems/ruby-1.8.7-p334/gems/actionpack-2.0.2/lib/action_controller/templates/rescues/layout.erb (not_found)
^C** INT signal received.
Exiting
mohnish@mohnish-desktop:~/UP/pocs_tried_for_use/post_with_image$

[问题已编辑]

请找到模型post.rb的代码：-

class Post < ActiveRecord::Base
  #require 'paperclip'
  has_attached_file :photo
end

我的routes.rb文件看起来像这样：-

ActionController::Routing::Routes.draw do |map|
  map.resources :posts

  # The priority is based upon order of creation: first created -> highest priority.

  # Sample of regular route:
  #   map.connect 'products/:id', :controller => 'catalog', :action => 'view'
  # Keep in mind you can assign values other than :controller and :action

  # Sample of named route:
  #   map.purchase 'products/:id/purchase', :controller => 'catalog', :action => 'purchase'
  # This route can be invoked with purchase_url(:id => product.id)

  # Sample resource route (maps HTTP verbs to controller actions automatically):
  #   map.resources :products

  # Sample resource route with options:
  #   map.resources :products, :member => { :short => :get, :toggle => :post }, :collection => { :sold => :get }

  # Sample resource route with sub-resources:
  #   map.resources :products, :has_many => [ :comments, :sales ], :has_one => :seller

  # Sample resource route within a namespace:
  #   map.namespace :admin do |admin|
  #     # Directs /admin/products/* to Admin::ProductsController (app/controllers/admin/products_controller.rb)
  #     admin.resources :products
  #   end

  # You can have the root of your site routed with map.root -- just remember to delete public/index.html.
  # map.root :controller => "welcome"
  map.root :controller => "posts"

  # See how all your routes lay out with "rake routes"

  # Install the default routes as the lowest priority.
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
end

我不确定我哪里出了问题，请帮助我同样的..

非常感谢您的帮助...

Answer 1

只是为了形式化问题评论中的答案：

您需要确保 /photo/4/original/ruby-on-rails.jpg 存在于您的 public 文件夹下，因为默认情况下 Paperclip 应在此处存储其所有附件。