Question

My 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'来下载图像。现在我需要建立一个月份模型属于壁纸模型的关联。

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

月份模型：

class Month < ActiveRecord::Base
  belongs_to :wallpaper

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

有友好的壁纸模型：

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

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

在months_controller中我制作了下载方法，此方法无需关联：

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/索引

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

我尝试在months_controller中更改下载方法，但这是错误的：

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

Answer 1

以下是我如何得到它路线

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

在路线中我必须通过：wallpaper_id（has_many：months），
：id是当前控制器的id（belongs_to：wallpaper）
'download'将是视图'download_path'中使用的路径的名称在这条路径中，我必须传递外键和id

查看月/索引

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

在months_controller 中，下载方法将接收这些参数并将相关图像传递给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，请将其更改为send_data或
在config / production.rb中注释掉这一行

config.action_dispatch.x_sendfile_header = "X-Sendfile"

send_file just sends an empty file

Rails 3.0关联模型，下载'保存到'图像

1 个答案: