使用 Carrierwave (HTML5) 将多个文件一次上传到 Rails 应用程序

我很接近...非常接近...我可以很好地上传单个文件...但是当我更改表单的类型时file_field to :multiple => true所以我可以一次上传多个图像，我上传的文件被包装在一个数组中......并且“accepts_nested_attributes_for”的“魔力”丢失了。

Edit:经过更多检查后，我想知道我是否需要费心accepts_nested_attributes_for？也许我应该有一个file_field, :multiple => true在我的画廊表单（而不是嵌套表单）中，然后在我的创建操作中创建新画廊，然后循环遍历中的每个元素params[:gallery][:photos_attributes]["0"][:image]手动数组，可以这么说，调用@gallery.photos.create对于每个元素。 ？！？看起来很麻烦……但这就是我能想到的。

希望对Rails有更多经验的人能够插话......

Params:

{"utf8"=>"✓", 
"authenticity_token"=>"9jXvIwcllct7UyUfo6cvhEucQf2u3SY50SuaCLtFO4c=", 
"gallery"=>{
  "name"=>"First Gallery", 
  "photos_attributes"=>{"0"=>{
    "image"=>[
      #<ActionDispatch::Http::UploadedFile:0x00000104b78978 
        @original_filename="first_test_image.jpg", 
        @content_type="image/jpeg", 
        @headers="Content-Disposition: form-data; name=\"gallery[photos_attributes][0][image][]\"; filename=\"first_test_image.jpg\"\r\nContent-Type: image/jpeg\r\n", 
        @tempfile=#<File:/var/folders/bQ/bQYZC2ukFZCvbKzEDGRtJE+++TI/-Tmp-/RackMultipart20110622-4459-vz78ee>>, 
      #<ActionDispatch::Http::UploadedFile:0x00000104b78950 
        @original_filename="second_test_image.jpg", 
        @content_type="image/jpeg", 
        @headers="Content-Disposition: form-data; name=\"gallery[photos_attributes][0][image][]\"; filename=\"second_test_image.jpg\"\r\nContent-Type: image/jpeg\r\n", 
        @tempfile=#<File:/var/folders/bQ/bQYZC2ukFZCvbKzEDGRtJE+++TI/-Tmp-/RackMultipart20110622-4459-1jzhhyg>>
      ]
    }
  }
}, "commit"=>"Save", "action"=>"create", "controller"=>"galleries"}



#app/models/gallery.rb 
class Gallery < ActiveRecord::Base 
  has_many :photos, :dependent => :destroy 
  accepts_nested_attributes_for :photos 
end 

#app/models/photo.rb 
class Photo < ActiveRecord::Base 
  belongs_to :gallery 
  mount_uploader :photo, PhotoUploader 
end 

#config/routes.rb
resources :galleries do
  resources :photo, :only => [:create, :destroy]
end

画廊控制器

  def new
    @gallery = Gallery.new
    @gallery.photos.build

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @gallery }
    end
  end

  ...

  def create
    @gallery = Gallery.new(params[:gallery])

    respond_to do |format|
      if @gallery.save
        format.html { redirect_to @gallery, notice: 'Gallery was successfully created.' }
        format.json { render json: @gallery, status: :created, location: @gallery }
      else
        format.html { render action: "new" }
        format.json { render json: @gallery.errors, status: :unprocessable_entity }
      end
    end
  end

您可以对 params 数组进行一些修改，例如：

aux = []
params[:gallery][:photos_attributes][:image].each do |f|
  aux << {:image => f}
end
params[:post][:photos_attributes] = aux

@gallery = Gallery.new(params[:gallery])

我有一个类似的问题，我知道这是一个丑陋的黑客，但它对我有用。