導軌中的相冊

Question

我想在導軌中創建一個圖片庫。我製作了一個設置，允許您創建一個相冊並上傳照片。不過，我非常關注如何讓用戶將其中一個現有圖像設置爲圖像索引視圖中的相冊封面。
任何人有一些想法？我發現如果我使用單選按鈕，我無法確定如何確定哪個圖像是由ajax選擇的。我也不知道我會如何強制將一張圖像設置爲專輯封面。

這裏是我的設置：

控制器

class Admin::AlbumsController < ApplicationController 
    respond_to :html, :json 
    def index 
    @albums = Album.all 
    end 
    def new 
    @album = Album.new 
    end 
    def create 
    @album = Album.new(params[:album]) 
    if @album.save 
     flash[:notice] = "Successfully created album!" 
     redirect_to [:admin, :albums] 
    else 
     render "new" 
    end 
    end 
    def edit 
    @album = Album.find(params[:id]) 
    end 
    def show 
    @album = Album.find(params[:id]) 
    end 
    def update 
    @album = Album.find(params[:id]) 
    @album.update_attributes(params[:album]) 
    if @album.update_attributes(params[:album]) 
     respond_with @album 
     flash[:notice] = "Successfully updated Album" 
    else 
     render "edit" 
    end 
    end 
    def destroy 
    @album = Album.find(params[:id]) 
    @album.destroy 
    @id = @album.id 
    FileUtils.remove_dir("#{Rails.root}/public/uploads/image/picture/#{@id}", :force => true) 
    respond_to do |format| 
     format.js { render :layout => false } 
    end 
    redirect_to admin_albums_path 
    end 
    def random_image 
    @image_files = %w(.jpg .gif .png) 
    @files ||= Dir.entries(
     "#{RAILS_ROOT}/public/uploads").delete_if { |x| 
     !@image_files.index(x[-4,4]) 
     } 

    file = @files[rand(@files.length)]; 
    @files.delete file 

    return "/images/logos/#{file}" 
    end 
    def ajaxUpdate 
    @album = Album.find(params[:album_id]) 
    @image = @album.images.find(params[:albumcover]) 
    if @image.update_attributes(params[:image]) 
     flash[:notice] = "Successfully updated Image" 
    else 
     render "edit" 
    end 
    end 

end 
class Admin::ImagesController < ApplicationController 
    respond_to :html, :json 
    #before_filter :split_hash, :only => [ :create, :update ] 
    def index 
     @album = Album.find(params[:album_id]) 
     @images = @album.images.all 
    end 
    def new 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.new 
    end 
    def create 
     params[:image][:source].each do |image| 
      @album = Album.find(params[:album_id]) 
      @params = {} 
      @params['source'] = image 
      @image = @album.images.create(@params) 
     end 
     if @image.save 
      if params[:image][:source].size > 1 
       flash[:notice] = "Successfully added images!" 
      else 
       flash[:notice] = "Successfully added image!" 
      end 
      redirect_to [:admin, @album, :images] 
     else 
      render "new" 
      flash[:notice] = "Did not successfully add image :(" 
     end 
    end 
    def show 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
    end 
    def edit 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
    end 
    def update 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
     if @image.update_attributes(params[:image]) 
      redirect_to [:admin, @album, :images] 
      flash[:notice] = "Successfully updated Image" 
     else 
      render "edit" 
     end 
    end 
    def destroy 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:id]) 
     @image.destroy 
     @albumid = @album.id 
     @id = @image.id 
     FileUtils.remove_dir("#{Rails.root}/public/uploads/image/picture/#{@albumid}/#{@id}", :force => true) 
     redirect_to admin_album_images_path(@album) 
    end 
    def ajaxUpdate 
     @album = Album.find(params[:album_id]) 
     @image = @album.images.find(params[:albumcover]) 
     if @image.update_attributes(params[:image]) 
      flash[:notice] = "Successfully updated Image" 
     else 
      render "edit" 
     end 
    end 
    #  def split_hash 
    #   @album = Album.find(params[:album_id]) 
     # @image = @album.images 
    #  array_of_pictures = params[:image][:picture] 
    #  array_of_pictures.each do |pic| 
    #   size = array_of_pictures.size.to_i 
    #   size.times {@image.build(params[:image], :picture => pic)} 
    #   @image.save 
     # end 
    #  end 
end 

模式

class Album < ActiveRecord::Base 
    attr_accessible :title, :description, :album_id 
    has_many :images, :dependent => :destroy 
    validates :title, :description, :presence => true 
end 
class Image < ActiveRecord::Base 
    attr_accessible :title, :description, :source, :album_id, :albumcover, :image, :image_id 
    belongs_to :album 
    accepts_nested_attributes_for :album 
    mount_uploader :source, PictureUploader 
end 

查看

<% content_for :head do %> 
    <%= stylesheet_link_tag 'admin/images' %> 
    <%= javascript_include_tag "admin.js" %> 
<% end %> 
<% content_for :menu do %> 
    <li class="menu_item"><%=link_to "New Album", :controller => "albums", :action => "new" %></li> 
    <li class="menu_item"><%= link_to "Add Images", {:controller => "images", :action => "new"}, :class => "highlight_menu"%> </li> 
<% end %> 
<%= link_to "< Back", admin_albums_path, :id => "return_link" %> </br> 
<h1 class="section-title"> <strong style="font-weight: 600;"><%=best_in_place [:admin,@album], :title, :ok_button => :confirm %></strong></h1> 
<h4 class="album-desc"><%= best_in_place [:admin,@album], :description, :type => :textarea, :ok_button => :confirm%></h4> 

<%= form_tag admin_album_images_path(@album) do %> 
<% if !@images.blank? %> 
    <% @images.each do |image| %> 
     <div class="item"> 
      <div class="image-box"> 
       <div class="source"> 
        <%= image_tag image.source %> 
       </div> 
      </div> 
      <div class="info"> 
       <div class="item-links"> 
        <%= link_to "Edit", edit_admin_album_image_path(@album, image.id), :id => "edit"%> 
        <%= link_to "Delete", 
         admin_album_image_path(@album, image.id), 
         :class => "item-link delete-image", 
         :method => :delete, 
         :remote => true, 
         :confirm => "Are you sure?" %> 
       </div> 
      </div> 
     </div> 
     <% end %> 
    <% else %> 
     <p class="alert">No images in this album</p> 
    <% end %> 
<% end %> 

回答！

* albums_controller *

def albumCoverSet 
    @album = Album.find(params[:album_id]) 
    @image = @album.images.find(params[:albumcover]) 
    if @image.update_attributes(params[:image]) 
     flash[:notice] = "Successfully updated Image" 
    else 
     render "edit" 
    end 
    end 

*相冊查看*

<div class="image"> 
     <%= image_tag album.images.find(album.albumcover_id).source, :class => "image" %> 
    </div> 

模型

class Album < ActiveRecord::Base 
    attr_accessible :title, :description, :album_id, :albumcover_id 
    has_many :images, :dependent => :destroy 
    has_one :albumcover, :class_name => "Image" 
    validates :title, :description, :presence => true 
end 

Answer 1

您可以在遷移中添加 'primary_image_id' 的專輯。

has_one :primary_image, :class_name => 'Image' 

在您的表單中，您可以顯示所有album.images並選擇一個。單選按鈕應該工作得很好。

提交參數的值將設置primary_image_id。