我想在 Rails 中创建一个图片库。我制作了一个设置，允许您创建相册并将照片上传到其中。但是，我对如何允许用户将现有图像之一设置为图像索引视图中的专辑封面感到困惑。
有人有什么想法吗？我发现如果我使用单选按钮，我无法弄清楚如何确定 ajax 选择了哪个图像。我也不知道如何强制只将一张图片设置为专辑封面。
这是我的设置：
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
楷模
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
看法
<% 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！
*专辑控制器*
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
*专辑视图*
<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