的Rails 3回形針Uploadify：保存上傳附件對象保存對象

Question

我使用Rails 3和回形針工作，上傳的文件附加到使用多態關聯的幾個對象類型之前。我已經創建了一個資產模型和繼承的圖像模型（將增加其他的如視頻和文檔版本）如下：

# app/models/asset.rb 
class Asset < ActiveRecord::Base 
    # Nothing here yet 
end 

# app/models/image.rb 
class Image < Asset 
    belongs_to :assetable, :polymorphic => true 
    has_attached_file :file, { 
    :styles => { 
     :small => { :geometry => '23x23#', :format => 'png' }, 
     :medium => { :geometry => '100x100#', :format => 'png' } } 
    }.merge(PAPERCLIP_STORAGE_OPTIONS).merge(PAPERCLIP_STORAGE_OPTIONS_ASSET_IMAGE) # Variables sent in environments to direct uploads to filesystem storage in development.rb and S3 in production.rb 
    validates_attachment_presence :file 
    validates_attachment_size :file, :less_than => 5.megabytes 
end 

我然後有另一個對象類型，單元，其中我附上多個圖像，以作爲如下：

# app/models/unit.rb 
class Unit < ActiveRecord::Base 
    # ... 

    has_many :images, :as => :assetable, :dependent => :destroy 
    accepts_nested_attributes_for :images 

end 

# app/controllers/units_controller.rb 
class UnitsController < ApplicationController 
    # ... 

    def new 
    @unit = current_user.units.new 
    # ... 
    @unit.images.build 
    end 

    def create 
    @unit = current_user.units.new(params[:unit]) 
    # ... 
    respond_to do |format| 
     if @unit.save 
     format.html { redirect_to(@unit, :notice => 'Unit creation successful!') } 
     else 
     format.html { render :action => "new" } 
     end 
    end 
    end 

    def show 
    @unit = current_user.units.find(params[:id]) 
    @unit_images = @unit.images 
    # ... 
    end 

    def edit 
    @unit = current_user.units.find(params[:id]) 
    # ... 
    @unit.images.build 
    end 

    def update 
    @unit = current_user.units.find(params[:id], :readonly => false) 

    respond_to do |format| 
     if @unit.update_attributes(params[:unit]) 
     format.html { redirect_to(@unit, :notice => 'Unit was successfully updated.') } 
     else 
     format.html { render :action => "edit" } 
     end 
    end 
    end 

    def destroy 
    @unit = current_user.units.find(params[:id]) 
    @unit.destroy 

    respond_to do |format| 
     format.html { redirect_to(units_url) } 
    end 
    end 

end 

# app/views/units/_form.html.haml 
.field # Display already uploaded images 
    = f.fields_for :images do |assets| 
    - unless assets.object.new_record? 
     = link_to(image_tag(assets.object.file.url(:medium)), assets.object.file.url(:original)) 
.field # Display field to add new image 
    = f.fields_for :images do |assets| 
    - if assets.object.new_record? 
     = assets.label :images, "Image File" 
     = assets.file_field :file, :class => 'uploadify' 

使用這些設置，我可以每次上傳一張圖片，每次顯示一張表格。當我試圖整合Uploadify添加多文件上傳/預覽

的問題入手。我已經滿足了所有Uploadify依賴關係，但爲了保存與Unit模型關聯的圖像，我需要以某種方式包含對unit_id的敬畏，以便可以正確地進行多態關聯。以下是我目前的Uploadify代碼：

%script 
    $(document).ready(function() { 
    $('.uploadify').uploadify({ 
     uploader  : '/uploadify/uploadify.swf', 
     cancelImg  : '/uploadify/cancel.png', 
     auto   : true, 
     multi   : true, 
     script   : '#{units_path}', 
     scriptData  : { 
     "#{key = Rails.application.config.session_options[:key]}" : "#{cookies[key]}", 
     "#{request_forgery_protection_token}" : "#{form_authenticity_token}", 
     } 
    }); 
    }); 

所以雖然我可以很容易地用Paperclip上傳，但Uploadify不起作用。任何幫助將非常感激。先謝謝你。

---

UPDATE：Rails3, S3, Paperclip Attachment as it's own model?：

做更多的研究，我碰到這個評論跑到一個類似的問題後。有沒有想過在這種情況下是否可行？有沒有簡單的方法確定/new方法中的unit.id並將其傳遞給Uploadify創建的資產？

Answer 1

我們曾在一個draft狀態（使用狀態機）加載表格時保存模型馬上一旦解決一個非常類似的問題。就像這樣，當你試圖附加你上傳的文件時，模型就可以使用，並且一旦你提交了表單的其餘部分，你基本上只是更新模型，它將狀態改變爲例如published。更新控制器等是一件小事，但它的確有用。