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我的 Rails 3.0.3 应用程序有一个脚手架“月”,其中有一个链接,用户可以使用“保存到”下载图像。现在我需要将月份模型属于_壁纸模型的位置关联起来。

路线:

  root :to => 'inicio#index'

  resources :wallpapers do
    resources :months
  end

  # the route that works with no association
  # match 'download/:id' =>  'months#download', :as => :download

  # the route I tried
  match 'wallpapers/:id/months/:id' =>  'months#download', :as => :download

月份型号:

class Month < ActiveRecord::Base
  belongs_to :wallpaper

  has_attached_file :wallpaper_picture, :styles => {
    :default => { :geometry => '530x330', :quality => 80, :format => 'jpg'}
  }
end

带有友好ID的壁纸模型:

class Wallpaper < ActiveRecord::Base  
  has_many :months, :dependent => :destroy

  extend FriendlyId
  friendly_id :title, :use => :slugged
end

在months_controller中我做了下载方法,这个方法没有关联:

class MonthsController < InheritedResources::Base
  belongs_to :wallpaper, :finder => :find_by_slug!

  def download
    @wallpaper = Wallpaper.find(params[:wallpaper_id])
    @month = @wallpaper.month.find(params[:id])

    send_file @month.wallpaper_picture.path,
              :filename => @month.wallpaper_picture_file_name,
              :type => @month.wallpaper_picture_content_type,
              :disposition => 'attachment'
  end
end

查看月份/索引

- @months.each do |month|  
  = link_to image_tag(month.wallpaper_picture(:default)), wallpaper_month_path(month.wallpaper, month)

我已经尝试在months_controller 中更改下载方法,但它是错误的:

@months = Wallpaper.month.conditions({:person_id => some_id})
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1 回答 1

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这是我得到它的
方式

resources :wallpapers do  
  resources :months  
end  
match 'wallpaper/:wallpaper_id/download/:id' => 'months#download', :as => :download

在路由中我必须通过 :wallpaper_id (has_many :months),:
id 是当前控制器的 id (belongs_to :wallpaper)
'download' 将是视图中使用的路径的名称 'download_path'
在这个路径中我必须通过外键和 id

查看月份/索引

- @months.each do |month|     
  = link_to 'Download Picture', download_path(month.wallpaper_id, month.id) 

在months_controller中,download 方法将接收这些参数并将关联的图像传递给send_file 方法。

def download
  @wallpaper = Wallpaper.find(params[:wallpaper_id])
  @month = @wallpaper.months.find(params[:id])

  send_file @month.wallpaper_picture.path,
              :filename => @month.wallpaper_picture_file_name,
              :type => @month.wallpaper_picture_content_type,
              :disposition => 'attachment'
end

PD:如果 send_file 在 Production 中失败,将其更改为 send_data 或
在 config/production.rb 中注释掉这一行

config.action_dispatch.x_sendfile_header = "X-Sendfile"  

send_file 只是发送一个空文件

于 2012-12-28T03:49:45.597 回答