使用回形针上传多个文件

我在使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paperclip在我的其他模型上保存它没有问题，但我不知道如何在多文件上传期间处理imgarrays param返回的数组。

这是我的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=#>, #<ActionDispatch::Http::UploadedFile:0x007fb471e99dc8 @original_filename="[e-mail]", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"[e-mail]\"\r\nContent-Type: image/png\r\n", @tempfile=#>, #<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=#>]}, "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) 

new.html.erb for slider

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

Answer 1

这是我的代码，使用paperclip上传多个文件效果很好：我们可以使用嵌套属性或使用普通的简单方法。

以下代码显示了常规方法：

User.rb

has_many：images，：dependent =>：destroy

Image.rb

has_attached_file：avatar，：styles => {：medium =>“300×300>”}

belongs_to：用户

用户/视图/ new.html.erb

 <%= form_for @user, :html => { :multipart => true } do |f| %> ...... .... <%= file_field_tag :avatar, multiple: true %> <% end %> 

Users_controller：

…..

  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 

而已。 图像上传，这可能不是好方法，但它的工作原理。