Ruby on rails 使用回形针上载多个文件

我用回形针上传多个文件时遇到问题

我的模特就是这样

slider has_many imgarrays

imgarrays has_many imageobjects

imageobjects have_attachment(as for paperclip)

我在接收单个图像并使用回形针将其保存到其他型号上时没有问题，但我不确定如何在多文件上载期间处理

imgarays

param返回的数组

以下是我的rails服务器日志：

Started POST "/slider" for 127.0.0.1 at 2012-07-23 10:14:17 +0800
  Processing by SliderController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"7HcHtSlOsU/bnxb9emhAsSl/GFBraIE6NxwijHl3REM=", "slider"=>{"question"=>"", "answer"=>"", "score"=>"", "industry_name"=>"", 
  "imgarrays"=>[#<ActionDispatch::Http::UploadedFile:0x007fb471e99f30 @original_filename="Icon.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"Icon.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-1lyi4yf>>, #<ActionDispatch::Http::UploadedFile:0x007fb471e99dc8 @original_filename="Icon@2x.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"Icon@2x.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-10lala2>>, #<ActionDispatch::Http::UploadedFile:0x007fb471e99d50 @original_filename="greenButton.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"greenButton.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-or2rdk>>]}, "commit"=>"Create!"}
Completed 500 Internal Server Error in 18ms

ActiveRecord::AssociationTypeMismatch (Imgarray(#70206507050500) expected, got ActionDispatch::Http::UploadedFile(#70206487229960)):
  app/controllers/slider_controller.rb:12:in `new'
  app/controllers/slider_controller.rb:12:in `create'

Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.4ms)
Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.4ms)
Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (6.5ms)

2012年7月23日10:14:17+0800时，127.0.0.1版的“

开始发布“/滑块”
通过SliderController处理#创建为HTML
参数：{“utf8”=>“✓", "真实性令牌“=>”7HcHtSlOsU/bnxb9emhAsSl/GFBraIE6NxwijHl3REM=“，“滑块”=>{“问题”=>，“答案”=>，“分数”=>，“行业名称”=>，
“imgarrays”=>
在18毫秒内完成500个内部服务器错误
ActiveRecord:：AssociationTypeMismatch（应为imgaray（#7020650705500），获得ActionDispatch:：Http:：UploadedFile（#70206487229960））：
app/controllers/slider_controller.rb:12:in'new'
app/controllers/slider\u controller.rb:12:in'create'
Rendered/Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action\u dispatch/middleware/templates/rescues//u trace.erb（1.4ms）
Rendered/Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action\u dispatch/middleware/templates/rescues//u request\u and\u response.erb（1.4ms）
rescues/layout中的Rendered/Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action\u dispatch/middleware/templates/rescues/diagnostics.erb（6.5ms）

滑块的new.html.erb

<div>
<%= form_for @slider ,:url=>"/slider" , :html => { :multipart => true } do |f| %>

      <%= f.label :question , "question"%>
      <%= f.text_field :question %> </br>
        <%= f.label :answer , "answer array (comma seperated)"%>
          <%= f.text_field :answer %>   </br>
        <%= f.label :score , "score"%>
     <%= f.text_field :score %> </br>
            <%= f.label :industry_name , "industry"%>
              <%= f.text_field :industry_name %>    </br>

        <%= f.label :attachedimg , "image"%>
         <%= f.file_field :imgarrays, :multiple =>:true %>  </br>

      <%= f.submit "Create", class: "btn btn-large btn-primary" %>
    <% end %>

</div>
<%= link_to 'Cancel', slider_index_path %>

“/slider”，：html=>{:multipart=>true}do | f |%>








：真%>

以下是我使用回形针上传多个文件的代码： 我们可以使用嵌套属性或使用普通的easy方法来实现

以下代码显示了正常方法：

User.rb

有许多：映像，：依赖=>：销毁

Image.rb

是否已附加文件：avatar，：style=>{:medium=>“300x300>”}

属于：用户

users/views/new.html.erb

<%= form_for @user, :html => { :multipart => true } do |f| %>

...... 
 ....

<%= file_field_tag :avatar, multiple: true %>

<% end  %>

---

就这样。图像已上载，这可能不是一个好方法，但它很有效。

您不能使用while循环来迭代返回的数组吗？哦，伙计，这是一个非常简单的解决方案，谢谢！你能给我一个答案让我接受吗

    if @user.save
     # params[:avatar] will be an array.
     # you can check total number of photos selected using params[:avatar].count
      params[:avatar].each do |picture|      
    
        @user.images.create(:avatar=> picture)
        # Don't forget to mention :avatar(field name)
    
      end
    end