多個文件上傳選項產生錯誤軌道

當我在我的視圖中添加選項:multiple => true到f.file_field :picture,時，它會在提交表單時創建can't convert nil into String錯誤。爲什麼它這樣做，我該如何解決它？多個文件上傳選項產生錯誤軌道

完整曲線

carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:159:in `join' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:159:in `cache_path' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:131:in `cache!' 
carrierwave (0.8.0) lib/carrierwave/uploader/callbacks.rb:17:in `with_callbacks' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:122:in `cache!' 
carrierwave (0.8.0) lib/carrierwave/mount.rb:327:in `cache' 
carrierwave (0.8.0) lib/carrierwave/mount.rb:179:in `picture=' 
carrierwave (0.8.0) lib/carrierwave/orm/activerecord.rb:38:in `picture=' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:85:in `send' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:85:in `assign_attributes' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:78:in `each' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:78:in `assign_attributes' 
activerecord (3.2.11) lib/active_record/base.rb:497:in `initialize' 
activerecord (3.2.11) lib/active_record/reflection.rb:183:in `new' 
activerecord (3.2.11) lib/active_record/reflection.rb:183:in `build_association' 
activerecord (3.2.11) lib/active_record/associations/association.rb:233:in `build_record' 
activerecord (3.2.11) lib/active_record/associations/collection_association.rb:112:in `build' 
activerecord (3.2.11) lib/active_record/associations/collection_proxy.rb:46:in `__send__' 
activerecord (3.2.11) lib/active_record/associations/collection_proxy.rb:46:in `new' 
app/controllers/admin/images_controller.rb:17:in `create' 
actionpack (3.2.11) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.11) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.11) lib/abstract_controller/base.rb:167:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (3.2.11) lib/abstract_controller/callbacks.rb:18:in `process_action' 
activesupport (3.2.11) lib/active_support/callbacks.rb:425:in `_run__164786065__process_action__352915844__callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.11) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.11) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
activesupport (3.2.11) lib/active_support/notifications.rb:123:in `instrument' 
activesupport (3.2.11) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.11) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/params_wrapper.rb:207:in `process_action' 
activerecord (3.2.11) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (3.2.11) lib/abstract_controller/base.rb:121:in `process' 
actionpack (3.2.11) lib/abstract_controller/rendering.rb:45:in `process' 
actionpack (3.2.11) lib/action_controller/metal.rb:203:in `dispatch' 
actionpack (3.2.11) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.2.11) lib/action_controller/metal.rb:246:in `action' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:73:in `call' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:36:in `call' 
journey (1.0.4) lib/journey/router.rb:68:in `call' 
journey (1.0.4) lib/journey/router.rb:56:in `each' 
journey (1.0.4) lib/journey/router.rb:56:in `call' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:601:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
rack (1.4.5) lib/rack/etag.rb:23:in `call' 
rack (1.4.5) lib/rack/conditionalget.rb:35:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/head.rb:14:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/flash.rb:242:in `call' 
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context' 
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/cookies.rb:341:in `call' 
activerecord (3.2.11) lib/active_record/query_cache.rb:64:in `call' 
activerecord (3.2.11) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/callbacks.rb:28:in `call' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `_run__1862416574__call__4__callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.11) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.11) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/reloader.rb:65:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
railties (3.2.11) lib/rails/rack/logger.rb:32:in `call_app' 
railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
activesupport (3.2.11) lib/active_support/tagged_logging.rb:22:in `tagged' 
railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
activesupport (3.2.11) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.4.5) lib/rack/lock.rb:15:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/static.rb:62:in `call' 
railties (3.2.11) lib/rails/engine.rb:479:in `call' 
railties (3.2.11) lib/rails/application.rb:223:in `call' 
rack (1.4.5) lib/rack/content_length.rb:14:in `call' 
railties (3.2.11) lib/rails/rack/log_tailer.rb:17:in `call' 
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:95:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `each' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:23:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:82:in `start' 
rack (1.4.5) lib/rack/handler/webrick.rb:13:in `run' 
rack (1.4.5) lib/rack/server.rb:268:in `start' 
railties (3.2.11) lib/rails/commands/server.rb:70:in `start' 
railties (3.2.11) lib/rails/commands.rb:55 
railties (3.2.11) lib/rails/commands.rb:50:in `tap' 
railties (3.2.11) lib/rails/commands.rb:50 
script/rails:6:in `require' 
script/rails:6

已滿錯誤

TypeError in Admin::ImagesController#create 

can't convert nil into String 
Rails.root: /Users/derek_duncan/Documents/Websites/Bud Beverly Photography/admin 

Application Trace | Framework Trace | Full Trace 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:159:in `join' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:159:in `cache_path' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:131:in `cache!' 
carrierwave (0.8.0) lib/carrierwave/uploader/callbacks.rb:17:in `with_callbacks' 
carrierwave (0.8.0) lib/carrierwave/uploader/cache.rb:122:in `cache!' 
carrierwave (0.8.0) lib/carrierwave/mount.rb:327:in `cache' 
carrierwave (0.8.0) lib/carrierwave/mount.rb:179:in `picture=' 
carrierwave (0.8.0) lib/carrierwave/orm/activerecord.rb:38:in `picture=' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:85:in `send' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:85:in `assign_attributes' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:78:in `each' 
activerecord (3.2.11) lib/active_record/attribute_assignment.rb:78:in `assign_attributes' 
activerecord (3.2.11) lib/active_record/base.rb:497:in `initialize' 
activerecord (3.2.11) lib/active_record/reflection.rb:183:in `new' 
activerecord (3.2.11) lib/active_record/reflection.rb:183:in `build_association' 
activerecord (3.2.11) lib/active_record/associations/association.rb:233:in `build_record' 
activerecord (3.2.11) lib/active_record/associations/collection_association.rb:112:in `build' 
activerecord (3.2.11) lib/active_record/associations/collection_proxy.rb:46:in `__send__' 
activerecord (3.2.11) lib/active_record/associations/collection_proxy.rb:46:in `new' 
app/controllers/admin/images_controller.rb:17:in `create' 
actionpack (3.2.11) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.11) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.11) lib/abstract_controller/base.rb:167:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (3.2.11) lib/abstract_controller/callbacks.rb:18:in `process_action' 
activesupport (3.2.11) lib/active_support/callbacks.rb:425:in `_run__164786065__process_action__352915844__callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.11) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.11) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
activesupport (3.2.11) lib/active_support/notifications.rb:123:in `instrument' 
activesupport (3.2.11) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.11) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.2.11) lib/action_controller/metal/params_wrapper.rb:207:in `process_action' 
activerecord (3.2.11) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (3.2.11) lib/abstract_controller/base.rb:121:in `process' 
actionpack (3.2.11) lib/abstract_controller/rendering.rb:45:in `process' 
actionpack (3.2.11) lib/action_controller/metal.rb:203:in `dispatch' 
actionpack (3.2.11) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.2.11) lib/action_controller/metal.rb:246:in `action' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:73:in `call' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:36:in `call' 
journey (1.0.4) lib/journey/router.rb:68:in `call' 
journey (1.0.4) lib/journey/router.rb:56:in `each' 
journey (1.0.4) lib/journey/router.rb:56:in `call' 
actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:601:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
rack (1.4.5) lib/rack/etag.rb:23:in `call' 
rack (1.4.5) lib/rack/conditionalget.rb:35:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/head.rb:14:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/flash.rb:242:in `call' 
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context' 
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/cookies.rb:341:in `call' 
activerecord (3.2.11) lib/active_record/query_cache.rb:64:in `call' 
activerecord (3.2.11) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/callbacks.rb:28:in `call' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `_run__1862416574__call__4__callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.11) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `send' 
activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.11) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/reloader.rb:65:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
railties (3.2.11) lib/rails/rack/logger.rb:32:in `call_app' 
railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
activesupport (3.2.11) lib/active_support/tagged_logging.rb:22:in `tagged' 
railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
activesupport (3.2.11) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.4.5) lib/rack/lock.rb:15:in `call' 
actionpack (3.2.11) lib/action_dispatch/middleware/static.rb:62:in `call' 
railties (3.2.11) lib/rails/engine.rb:479:in `call' 
railties (3.2.11) lib/rails/application.rb:223:in `call' 
rack (1.4.5) lib/rack/content_length.rb:14:in `call' 
railties (3.2.11) lib/rails/rack/log_tailer.rb:17:in `call' 
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:95:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `each' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:23:in `start' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:82:in `start' 
rack (1.4.5) lib/rack/handler/webrick.rb:13:in `run' 
rack (1.4.5) lib/rack/server.rb:268:in `start' 
railties (3.2.11) lib/rails/commands/server.rb:70:in `start' 
railties (3.2.11) lib/rails/commands.rb:55 
railties (3.2.11) lib/rails/commands.rb:50:in `tap' 
railties (3.2.11) lib/rails/commands.rb:50 
script/rails:6:in `require' 
script/rails:6 
Request 

Parameters: 

{"image"=>{"picture"=>[#<ActionDispatch::Http::UploadedFile:0x10ee93248 @tempfile=#<File:/var/folders/bx/6z1z5yks56j40v15n43tjh1c0000gn/T/RackMultipart20130326-11396-8ebtao-0>, 
@headers="Content-Disposition: form-data; name=\"image[picture][]\"; filename=\"IMG_0106.JPG\"\r\nContent-Type: image/jpeg\r\n", 
@content_type="image/jpeg", 
@original_filename="IMG_0106.JPG">, 
#<ActionDispatch::Http::UploadedFile:0x10ee93220 @tempfile=#<File:/var/folders/bx/6z1z5yks56j40v15n43tjh1c0000gn/T/RackMultipart20130326-11396-1d1ltko-0>, 
@headers="Content-Disposition: form-data; name=\"image[picture][]\"; filename=\"Screen Shot 2013-03-06 at 4.16.27 PM.png\"\r\nContent-Type: image/png\r\n", 
@content_type="image/png", 
@original_filename="Screen Shot 2013-03-06 at 4.16.27 PM.png">], 
"description"=>"dfas", 
"album_id"=>"10", 
"albumcover"=>"false", 
"title"=>"dfsa", 
"image_id"=>"id"}, 
"commit"=>"Create Image", 
"authenticity_token"=>"O9/iRhRJozks9ZE/LXfbDDZQa2/vEFcigu7Edkn3bWY=", 
"album_id"=>"10", 
"utf8"=>"✓"} 
Show session dump 

Show env dump 

Response 

Headers: 

None

控制器

class Admin::ImagesController < ApplicationController 
    respond_to :html, :json 
    def index 
     @album = Album.find(params[:album_id]) 
     @images = @album.images.all 
    end 
    # def new 
    # @album = Album.find(params[:album_id]) 
    # @image = @album.images.new 
    # end 
    def new 
     @album = Album.find(params[:album_id]) 
      @image = @album.images.new 
    end 
    def create 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.new(params[:image]) 

     if @image.save 
      flash[:notice] = "Successfully added image!" 
      redirect_to [:admin, @album, :images] 
     else 
      render :action => 'new' 
     end 
    end 
    def show 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
    end 
    def edit 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
    end 
    def update 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
     if @image.update_attributes(params[:image]) 
      flash[:notice] = "Successfully updated Image" 
      redirect_to [:admin, @album, :images] 
     else 
      render :action => "edit" 
     end 
    end 
    def destroy 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
     @image.destroy 
     @albumid = @album.id 
     @id = @image.id 
     FileUtils.remove_dir("#{Rails.root}/public/uploads/image/picture/#{@albumid}/#{@id}", :force => true) 
     redirect_to admin_album_images_path(@album) 
    end 

end

型號

class Image < ActiveRecord::Base 
    attr_accessible :title, :description, :picture, :image_id, :album_id, :albumcover 
    belongs_to :album 
    accepts_nested_attributes_for :album 
    mount_uploader :picture, PictureUploader 
    end

來源

2013-03-26 derek_duncan

同樣的問題。讓我知道如果你找到解決方案！ – Vitaly 2013-04-13 15:14:57

我會添加一個解決我的問題的答案:) – 2013-04-14 20:29:39

這是我的設置由數組分割開的字符串解決了這個錯誤，併發送的每個那些新的對象。

控制器

def create 
     params[:image][:picture].each do |image| //The :image is the object and the :picture is a row inside the :image where all files are being sent from the form. 
      @album = Album.find(params[:album_id]) 
      @params = {} 
      @params['picture'] = image 
      @image = @album.images.create(@params) 
     end 
     if @image.save 
      if params[:image][:picture].size > 1 
       flash[:notice] = "Successfully added images!" 
      else 
       flash[:notice] = "Successfully added image!" 
      end 
      redirect_to [:admin, @album, :images] 
     else 
      render "new" 
      flash[:notice] = "Did not successfully add image :(" 
     end 
    end

觀形成

<%= form_for([:admin, :album, @image], :html => {:multipart => true}) do |f| %> 
     <%= f.hidden_field :album_id, :value => @album.id %> 
     <%= f.hidden_field :albumcover, :value => false %> 
     <%= f.file_field :picture, :multiple => true %> 
     <%= f.submit "Submit", :class => "submit" %> 
<% end %>

來源

2013-04-14 20:31:42

多個文件上傳選項產生錯誤軌道

回答

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