我一直在寻找一些例子，但始终没有找到：
我正在尝试在正在开发的项目中实现JQuery-File-Upload，但是对于如何将其与嵌套属性配合使用感到困惑。
快速概述：
2个模型：
Comment [has_many :attachments]
Attachment [belongs_to :comment]
评论模型使用了 :attachments 的 accepts_nested_attributes_for。另外，我正在使用 Dragonfly。
我已经查看了 JQuery-File-Upload 网站上的 Rails 3 指南，但它们假设只有一个模型，所以所有内容都围绕一个表单构建。是否有人有他们实现的示例，或者存在我还没有发现的现有教程？
我相信有人遇到过类似的问题...JQuery-File-Upload 是否是合适的工具，还是我应该看看其他东西？
Features（漫画，拼图，文本栏等）和FeatureAssets（单独的漫画面板/颜色版本，特定填字游戏的问答文件等）。由于FeatureAssets仅与一个Feature相关联，所以我将模型嵌套（如您在我的上传表单中所见）。params[:feature_asset]实际上是我的上传者上传的file对象数组，而不仅仅是我习惯处理的那一个。经过一番尝试，通过迭代每个文件并从中创建一个FeatureAsset，它可以完美地工作！class Feature < ActiveRecord::Base
belongs_to :user
has_many :feature_assets
attr_accessible :name, :description, :user_id, :image
accepts_nested_attributes_for :feature_assets, :allow_destroy => true
validates :name, :presence => true
validates :user_id, :presence => true
mount_uploader :image, FeatureImageUploader
end
feature_asset.rb
belongs_to :user
belongs_to :feature
attr_accessible :user_id, :feature_id, :file, :file_cache
validates :user_id, :presence => true
validates :feature_id, :presence => true
validates :file, :presence => true
mount_uploader :file, FeatureAssetContentUploader
# grabs useful file attributes & sends them as JSON to the jQuery file uploader
def to_jq_upload
{
"file" => file,
"file_name" => 'asdf',
"url" => file.url,
"delete_url" => id,
"delete_type" => "DELETE"
}
end
feature_assets_controller.rb
def create
@feature = Feature.find(params[:feature_id])
params[:feature_asset]['file'].each do |f|
@feature_asset = FeatureAsset.create!(:file => f, :feature_id => @feature.id, :user_id => current_user.id)
end
redirect_to @feature
end
虽然可能帮助不大，但我下面提供了feature_asset_uploader.rb文件。它非常简化。
class FeatureAssetContentUploader < CarrierWave::Uploader::Base
storage :file
end
功能 _form.html.erb（类似于Stone的，但不完全相同）
<%= form_for [@feature, @feature_asset], :html => { :multipart => true } do |f| %>
<div class="row" id="fileupload">
<div class=" fileupload-buttonbar">
<div class="progressbar fileupload-progressbar nofade"><div style="width:0%;"></div></div>
<span class="btn btn-primary fileinput-button">
<i class="icon-plus"></i>
<span><%= t('feature_assets.add_files') %>...</span>
<%= hidden_field_tag :feature_id, @feature.id %>
<%= hidden_field_tag :user_id, current_user.id %>
<%= f.file_field :file, :multiple => true %>
</span>
<button type="submit" class="btn btn-success">Start Upload</button>
<button type="reset" class="btn btn-warning">Cancel Upload</button>
<button type="button" class="btn btn-danger">Delete Files</button>
</div>
</div>
虽然这只是一个最基本的版本，没有错误处理或其他一些好用的功能，但它可以帮助某些人。如果您有任何问题，请随时向我提问！
Kyle
我有一个类似的设置，使用Carrierwave运行。这是我的设置。我正在使用图像作为项目的嵌套资源。
Project.rb:
has_many :images, :dependent => :destroy
accepts_nested_attributes_for :images, :allow_destroy => true
Image.rb:
include Rails.application.routes.url_helpers
mount_uploader :image, ImageUploader
belongs_to :project
#one convenient method to pass jq_upload the necessary information
def to_jq_upload
{
"name" => read_attribute(:image),
"size" => image.size,
"url" => image.url,
"thumbnail_url" => image.thumb.url,
"delete_url" => image_path(:id => id),
"delete_type" => "DELETE"
}
end
Images_controller.rb:
def create
@image = Image.new(params[:image])
@image.project_id = params[:project_id]
@project = Project.find(params[:project_id])
@image.position = @project.images.count + 1
if @image.save
render :json => [ @image.to_jq_upload ].to_json
else
render :json => [ @image.to_jq_upload.merge({ :error => "custom_failure" }) ].to_json
end
end
请注意，这个东西真是让人头疼。
更新： projects/_form.html.erb
<div id="fileupload" class="image_add">
<%= form_for Image.new, :html => {:multipart => true} do |f| %>
<div class="fileupload-buttonbar">
<label class="fileinput-button">
<span>Add files...</span>
<%= hidden_field_tag :project_id, @project.id %>
<%= f.file_field :image %>
</label>
<button type="submit" class="start">Start Upload</button>
<button type="reset" class="cancel">Cancel Upload</button>
<button type="button" class="delete">Delete Files</button>
</div>
<% end %>
<div class="fileupload-content">
<div class="dropzone-container">
<div class="dropzone">Drop Image Files Here</div>
</div>
<table class="files"></table>
</div>
</div>
我已经解决了这个问题，并制作了一个演示应用程序来展示如何做到这一点。
简而言之，我有两个模型：item和upload。
item.rb:
has_many :uploads
accepts_nested_attributes_for :uploads, :allow_destroy => true
upload.rb:
belongs_to :item
has_attached_file :upload, :styles => { :large => "800x800", :medium => "400x400>", :small => "200x200>" }
我在项目控制器中添加了 uploads_attributes。
现在你可以将jquery-file-upload表单添加到你的视图中，但有一个问题：它会将每个照片分开发送请求。因此，这是我的jquery-file-upload初始化程序，它将所有照片上传到一个请求中（创建项目模型），然后重定向到你应用程序的根目录（你需要使用项目表单）：
<script type="text/javascript" charset="utf-8">
var num_added = 0;
var added = 0;
var all_data = {};
$(function () {
// Initialize the jQuery File Upload widget:
$('#fileupload').fileupload({
complete: function (e, data) {
window.location = "<%= root_url %>";
},
singleFileUploads: false
}) .bind('fileuploadadd', function (e, data) {num_added++;})
.bind('fileuploadsubmit', function (e, data) {
if(added < num_added)
{
if (added == 0)
all_data = data;
else
{
$.each(data['files'], function(i, file){
all_data['files'].push(file);
});
$.each(data['context'], function(i, context){
all_data['context'].push(context);
});
}
added++;
if (added == num_added)
{
added++;
all_data.submit();
}
return false;
}
})
.bind('fileuploadsend', function (e, data) {num_added = 0; added = 0;});
//
// Load existing files:
$.getJSON($('#fileupload').prop('action'), function (files) {
var fu = $('#fileupload').data('blueimpFileupload'),
template;
fu._adjustMaxNumberOfFiles(-files.length);
console.log(files);
template = fu._renderDownload(files)
.appendTo($('#fileupload .files'));
// Force reflow:
fu._reflow = fu._transition && template.length &&
template[0].offsetWidth;
template.addClass('in');
$('#loading').remove();
});
});
</script>