jQuery的文件上傳軌「錯誤空文件上傳結果」

Question

我有這樣的說法（形成部分）：

= javascript_include_tag 'car_photos' 
= stylesheet_link_tag('jquery.fileupload-ui') 
= form_for @car do |f| 
    - if @car.errors.any? 
    #error_explanation 
     %h2= "Ошибки в полях: #{pluralize(@car.errors.count, "error")}" 
     %ul 
     - @car.errors.full_messages.each do |msg| 
      %li= msg 
    .tab#car-data{style: "height: 1290px;"} 
    .field 
     = f.label :manufacturer_id, "Марка" 
     = f.select(:manufacturer_id, options_from_collection_for_select(VehicleManufacturer.all, :id, :name, @car.manufacturer_id), {}, :prompt => "Выберите марку", required: true, id: "manufacturer-select") 
    .field 
     = f.label :model_id, "Модель" 
     #models-area 
     = render :partial => 'models', :object => @models 
    .actions 
     = link_to 'Перейти к загрузке фотографий', "", id: "go-and-load-photos", remote: true 
    .tab#car-photo{style: "height: 1290px;"} 
    .actions 
     = link_to 'Назад к описанию', "", id: "go-and-load-car-data", remote: true 
    .actions 
    = f.submit 'Добавить', id: "submit-car" 
.car-photo 
    = form_for CarPhoto.new, :html => { :multipart => true, :id => "fileupload", remote: true } do |f| 
    .row.fileupload-buttonbar 
     %span.fileinput-button 
     %span Добавить файлы 
     = f.file_field :car_photo, multiple: true 
     = tag(:input, :type => "hidden", :name => request_forgery_protection_token.to_s, :value => form_authenticity_token) 
     %button.btn.btn-primary.start{type: "submit", remote: true} 
     %span Загрузить 
     %button.btn.btn-warning.cancel{type: "reset", remote: true} 
     %span Отменить загрузку 
     %button.btn.btn-danger.delete{type: "button", remote: true} 
     %span Удалить 
     %input.toggle{type: "checkbox"}/ 
    %table.table.table-striped 
     %tbody.files{"data-target" => "#modal-gallery", "data-toggle" => "modal-gallery"} 
:javascript 
    var fileUploadErrors = { 
     maxFileSize: 'Размер файла слишком велик', 
     minFileSize: 'Размер файла слишком мал', 
     acceptFileTypes: 'Расширение файла не поддерживается', 
     maxNumberOfFiles: 'Превышен лимит файлов', 
     uploadedBytes: 'Uploaded bytes exceed file size', 
     emptyResult: 'Файл не был загружен' 
    }; 
/The template to display files available for upload 
%script#template-upload{type: "text/x-tmpl"} 
    {% for (var i=0, file; file=o.files[i]; i++) { %} 
    <tr class="template-upload fade"> 
    <td class="preview"><span class="fade"></span></td> 
    <td class="name"><span>{%=file.name%}</span></td> 
    <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td> 
    {% if (file.error) { %} 
    <td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td> 
    {% } else if (o.files.valid && !i) { %} 
    <td> 
    </td> 
    <td class="start">{% if (!o.options.autoUpload) { %} 
    <button class="btn btn-primary"> 
    <span>Загрузить</span> 
    </button> 
    {% } %}</td> 
    {% } else { %} 
    <td colspan="2"></td> 
    {% } %} 
    <td class="cancel">{% if (!i) { %} 
    <button class="btn btn-warning"> 
    <span>Отменить загрузку</span> 
    </button> 
    {% } %}</td> 
    </tr> 
    {% } %} 
/The template to display files available for download 
%script#template-download{type: "text/x-tmpl"} 
    {% for (var i=0, file; file=o.files[i]; i++) { %} 
    <tr class="template-download fade"> 
    {% if (file.error) { %} 
    <td></td> 
    <td class="name"><span>{%=file.name%}</span></td> 
    <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td> 
    <td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td> 
    {% } else { %} 
    <td class="preview">{% if (file.thumbnail_url) { %} 
    <a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a> 
    {% } %}</td> 
    <td class="name"> 
    <a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a> 
    </td> 
    <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td> 
    <td colspan="2"></td> 
    {% } %} 
    <td class="delete"> 
    <button class="btn btn-danger" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}"> 
    <span>Удалить</span> 
    </button> 
    <input type="checkbox" name="delete" value="1"> 
    </td> 
    </tr> 
    {% } %} 
%script{charset: "utf-8", type: "text/javascript"} 
    $(function() { 
    \// Initialize the jQuery File Upload widget: 
    $('#fileupload').fileupload(); 
    \// 
    \// Load existing files: 
    $.getJSON($('#fileupload').prop('action'), function (files) { 
    var fu = $('#fileupload').data('fileupload'), 
    template; 
    fu._adjustMaxNumberOfFiles(-files.length); 
    console.log(files); 
    template = fu._renderDownload(files) 
    \.appendTo($('#fileupload .files')); 
    \// Force reflow: 
    fu._reflow = fu._transition && template.length && 
    template[0].offsetWidth; 
    template.addClass('in'); 
    $('#loading').remove(); 
    }); 

    }); 

正如你可以看到我試着上傳多張圖片，控制器是這樣的：

class CarPhotosController < ApplicationController 
    before_action :set_car_photo, only: [:show, :edit, :update, :destroy] 

    def new 
    @car_photo = CarPhoto.new 
    end 

    def create 
    #binding.pry 
    @car_photo = CarPhoto.new(car_photo: car_photo_params[:car_photo].first) 
    #binding.pry 
    #@car_photo.user_id = current_user.id 
    respond_to do |format| 
     if @car_photo.save #&& user_signed_in? 
     format.html { redirect_to @car_photo, notice: 'Photo was successfully created.' } 
     format.json { data = {id: @car_photo.id, thumb: view_context.image_tag(@car_photo.car_photo.url(:thumb))} 
     render json: data, status: :created, location: @car_photo } 
     else 
     format.html { render action: "new" } 
     format.json { render json: @car_photo.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    private 
    # Use callbacks to share common setup or constraints between actions. 
    def set_car_photo 
    @car_photo = CarPhoto.find(params[:id]) 
    end 

    # Never trust parameters from the scary internet, only allow the white list through. 
    def car_photo_params 
    params.require(:car_photo).permit(:car_photo, {:car_photo => []}) 
    end 
end 

當我在鉻日誌我看到一些提交的圖像，該服務器返回這樣JSON：

{"id":31,"thumb":"\u003Cimg alt=\"1\" src=\"/system/car_photos/car_photos/000/000/031/thumb/1.jpg?1394785415\" /\u003E"} 

和DB我看到它被保存，但爲什麼在我看來：

Error Empty file upload result 

我做錯了什麼？以及如何解決它？

Answer 1

jquery-file-upload庫需要特定格式的JSON響應：https://github.com/blueimp/jQuery-File-Upload/wiki/JSON-Response

這可能是問題。順便說一下，請不要以你的方式發送回覆，我的意思是，不要在你的控制器中調用查看方法。或者只發送url，然後在fileUpload回調中添加<img>標記或在視圖中呈現它（例如使用jbuilder寶石）