拖放区。通过 Ajax 手动上传 AcceptedFiles

Question

我有一个通过 ajax 提交的功能，它通过 jQuery 从表单中获取值。有多个拖放区，我需要在按下整个表单的提交按钮后从中抓取。

我可以像这样访问 dropzones 文件对象：

$('#foobar')[0].dropzone.getAcceptedFiles()[0]

这给了我这样的东西：

File

_removeLink: <a class="dz-remove" href="javascript:undefined;" data-dz-remove="">

accepted: true

dataURL: "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopG…etc"

height: 545

lastModified: 1516739363000

lastModifiedDate: Date 2018-01-23T20:29:23.000Z

name: "foobar.jpg"

previewElement: <div class="dz-preview dz-image-preview">

previewTemplate: <div class="dz-preview dz-image-preview">

size: 45960

status: "queued"

type: "image/jpeg"

upload: Object { progress: 0, total: 45960, bytesSent: 0, … }

webkitRelativePath: ""

width: 550

__proto__: FilePrototype { name: Getter, lastModified: Getter, lastModifiedDate: Getter, …

当我尝试将其放入对象以发送到服务器时出现错误：

var params = {
  id: $('bla).val(),
  dropzone_image: $('foobar')[0].dropzone.getAcceptedFiles()[0]
}

TypeError: 'click' called on an object that does not implement interface HTMLElement.

如何在此处将此 dropzone 文件作为 image/file 附加到后端？

Answer 1

基于 http://api.jquery.com/jquery.ajax/ 将您的 dropzone 文件位置添加到数据参数中，如下所示：

$.ajax({
   url: "location.url",
   data: $('foobar')[0].dropzone.getAcceptedFiles()[0]
}).done(function() {});

希望对您有所帮助

Answer 2

为了手动将 dropzone 图像文件发送到后端，我必须创建一个 javascript FormData object.

例如：

function getValues() {
    var formData = new FormData();
    // these image appends are getting dropzones instances
    formData.append('image', $('#foobar_image')[0].dropzone.getAcceptedFiles()[0]); // attach dropzone image element
    formData.append('image_2', $('#barfoo')[0].dropzone.getAcceptedFiles()[0]);
    formData.append("id", $("#id").val()); // regular text form attachment
    formData.append("_method", 'PUT'); // required to spoof a PUT request for a FormData object (not needed for POST request)

    return formData;
}

$(document).on('submit','#form', function(e) {
    e.preventDefault();
    e.stopPropagation();    

    $.ajax({
        method: 'POST',
        url: url/you/want,
        data: getValues(),
        processData: false, // required for FormData with jQuery
        contentType: false, // required for FormData with jQuery
        success: function(response) {
            // do something
        }
    });
});

拖放区。通过 Ajax 手动上传 AcceptedFiles

Dropzone. Manually upload AcceptedFiles via Ajax

ajax

jquery

typeerror

dropzone.js