我可以在javascript中将数组附加到'formdata'吗? [英] Can I append an array to 'formdata' in javascript?

问题描述

我正在使用 FormData 上传文件.我还想发送一组其他数据.

I'm using FormData to upload files. I also want to send an array of other data.

当我只发送图像时，它工作正常.当我将一些文本附加到 formdata 时，它工作正常.当我尝试附加下面的标签"数组时，其他一切正常，但没有发送数组.

When I send just the image, it works fine. When I append some text to the formdata, it works fine. When I try to attach the 'tags' array below, everything else works fine but no array is sent.

FormData 和附加数组有任何已知问题吗?

Any known issues with FormData and appending arrays?

实例化表单数据:

formdata = new FormData();

我创建的数组.Console.log 显示一切正常.

The array I create. Console.log shows everything working fine.

        // Get the tags
        tags = new Array();
        $('.tag-form').each(function(i){
            article = $(this).find('input[name="article"]').val();
            gender = $(this).find('input[name="gender"]').val();
            brand = $(this).find('input[name="brand"]').val();
            this_tag = new Array();
            this_tag.article = article;
            this_tag.gender = gender;
            this_tag.brand = brand;
            tags.push(this_tag);    
            console.log('This is tags array: ');
            console.log(tags);
        });
        formdata.append('tags', tags);
        console.log('This is formdata: ');
        console.log(formdata);

我如何发送:

        // Send to server
        $.ajax({
            url: "../../build/ajaxes/upload-photo.php",
            type: "POST",
            data: formdata,
            processData: false,
            contentType: false,
            success: function (response) {
                console.log(response);
                $.fancybox.close();
            }
        });

推荐答案

这个怎么样?

formdata.append('tags', JSON.stringify(tags));

...，相应地，在服务器上使用 json_decode 来解析它.看，FormData.append 的第二个值可以是...

... and, correspondingly, using json_decode on server to deparse it. See, the second value of FormData.append can be...

Blob、File 或字符串，如果两者都不是，则将值转换为字符串

a Blob, File, or a string, if neither, the value is converted to a string

在我看来，你的 tags 数组包含对象(@Musa 是对的，顺便说一句；使 this_tag 成为一个数组，然后为其分配字符串属性是没有意义的; 改用普通对象)，因此本机转换(使用 toString())是不够的.不过，JSON'ing 应该可以获取信息.

The way I see it, your tags array contains objects (@Musa is right, btw; making this_tag an Array, then assigning string properties to it makes no sense; use plain object instead), so native conversion (with toString()) won't be enough. JSON'ing should get the info through, though.

作为旁注，我将属性分配块重写为:

As a sidenote, I'd rewrite the property assigning block just into this:

tags.push({article: article, gender: gender, brand: brand});

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