我正在尝试为我的网络应用程序创建自己的简单多文件上传功能。但是，当用户提交他的图像时，我无法弄清楚如何循环浏览表中某一行中发布的条目。
发布的数据
{"album_id"=>"10",
"utf8"=>"✓",
"commit"=>"Create Image",
"authenticity_token"=>"O9/iRhRJozks9ZE/LXfbDDZQa2/vEFcigu7Edkn3bWY=",
"image"=>{"album_id"=>"10",
"description"=>"Example",
"albumcover"=>"false",
"title"=>"Title",
"picture"=>[#<ActionDispatch::Http::UploadedFile:0x10255fc28 @tempfile=#<File:/var/folders/bx/6z1z5yks56j40v15n43tjh1c0000gn/T/RackMultipart20130325-6919-14738ar-0>,
@headers="Content-Disposition: form-data; name=\"image[picture][]\"; filename=\"IMG_0106.JPG\"\r\nContent-Type: image/jpeg\r\n",
@content_type="image/jpeg",
@original_filename="IMG_0106.JPG">,
#<ActionDispatch::Http::UploadedFile:0x10255fc00 @tempfile=#<File:/var/folders/bx/6z1z5yks56j40v15n43tjh1c0000gn/T/RackMultipart20130325-6919-1o8msmh-0>,
@headers="Content-Disposition: form-data; name=\"image[picture][]\"; filename=\"Screen Shot 2013-03-05 at 9.00.28 PM.png\"\r\nContent-Type: image/png\r\n",
@content_type="image/png",
@original_filename="Screen Shot 2013-03-05 at 9.00.28 PM.png">],
"image_id"=>"id"}}
如您所见，该:picture行中有两个不同的文件数据。如何循环浏览该数据以将每个数据分配给不同的图像对象？
架构
ActiveRecord::Schema.define(:version => 20130319040930) do
create_table "albums", :force => true do |t|
t.string "title", :null => false
t.text "description"
t.date "date"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.integer "album_id"
end
create_table "images", :force => true do |t|
t.string "title"
t.string "description"
t.datetime "date"
t.integer "album_id"
t.integer "image_id"
t.string "picture"
t.boolean "albumcover"
end
create_table "users", :force => true do |t|
t.string "email"
t.string "password_digest"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
end
图像模型
class Image < ActiveRecord::Base
attr_accessible :title, :description, :picture, :image_id, :album_id, :albumcover
belongs_to :album
accepts_nested_attributes_for :album
mount_uploader :picture, PictureUploader
end
图像控制器
class Admin::ImagesController < ApplicationController
respond_to :html, :json
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 new
@album = Album.find(params[:album_id])
@image = @album.images.new
end
def create
@album = Album.find(params[:album_id])
@image = @album.images.new(params[:image])
if @image.save
flash[:notice] = "Successfully added image!"
redirect_to [:admin, @album, :images]
else
render :action => 'new'
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])
flash[:notice] = "Successfully updated Image"
redirect_to [:admin, @album, :images]
else
render :action => "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
end
看法
<%= stylesheet_link_tag 'admin/dashboard' %>
<%= stylesheet_link_tag 'admin/images' %>
<%= javascript_include_tag 'admin/dashboard'%>
<div class="container">
<header class="header">
<div class="header_content clearfix">
<h1 class="page_name">Dashboard</h1>
<ul class="navbar">
<li class="nav_item">Move</li>
<li class="nav_item">Edit</li>
<li class="nav_item">Delete</li>
</ul>
</div>
</header>
<section class="sidebar">
<div class="sidebar_content">
<ul class="menu">
<li class="menu_item active-menu"><%=link_to 'manage albums', admin_albums_path%></li>
<li class="menu_item"><%=link_to 'manage media' %></li>
<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>
<li class="menu_item"></li>
</ul>
</div>
</section>
<section class="content">
<div class="inner-box clearfix">
<%= 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 %></strong></h1>
<h4 class="album-desc"><%= best_in_place [:admin,@album], :description, :type => :textarea%></h4>
<% if !@images.blank? %>
<% @images.each do |image| %>
<div class="item">
<div class="image-box">
<div class="source">
<%= image_tag image.picture %>
</div>
</div>
<div class="info">
<div class="title">
<%= image.title %>
</div>
<div class="item-links">
<%= link_to "Edit", edit_admin_album_image_path(@album, image.id)%>
<%= 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 class="description clearfix">
<p>
<%= truncate(image.description, :length => 40) %>
</p>
</div>
<%= label(:albumcover, 'Set as Album Cover ', :style => "float: left;") %>
<%= radio_button_tag(:albumcover, :albumcover, false) %>
</div>
</div>
<% end %>
<% else %>
<p class="alert">No images in this album</p>
<% end %>
</div>
</section>
</div>