的Rails 3回形针Uploadify：保存上传附件对象保存对象

Question

我使用Rails 3和回形针工作，上传的文件附加到使用多态关联的几个对象类型之前。我已经创建了一个资产模型和继承的图像模型（将增加其他的如视频和文档版本）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 

我然后有另一个对象类型，单元，其中我附上多个图像，以作为如下：

# 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' 

使用这些设置，我可以每次上传一张图片，每次显示一张表格。当我试图整合Uploadify添加多文件上传/预览

的问题入手。我已经满足了所有Uploadify依赖关系，但为了保存与Unit模型关联的图像，我需要以某种方式包含对unit_id的敬畏，以便可以正确地进行多态关联。以下是我目前的Uploadify代码：

%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}", 
     } 
    }); 
    }); 

所以虽然我可以很容易地用Paperclip上传，但Uploadify不起作用。任何帮助将非常感激。先谢谢你。

---

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

做更多的研究，我碰到这个评论跑到一个类似的问题后。有没有想过在这种情况下是否可行？有没有简单的方法确定/new方法中的unit.id并将其传递给Uploadify创建的资产？

Answer 1

我们曾在一个draft状态（使用状态机）加载表格时保存模型马上一旦解决一个非常类似的问题。就像这样，当你试图附加你上传的文件时，模型就可以使用，并且一旦你提交了表单的其余部分，你基本上只是更新模型，它将状态改变为例如published。更新控制器等是一件小事，但它的确有用。