如何将数组中的单个文件附加到FormData？

Question

I have a list of files that need to be uploaded to an AJAX call. I use formData.append('uploads[]', fileList[i], names[i]) to do it.

If the fileList contains multiple files, the uploads[] received by server will be an array of files. This works perfect fine.

The problem is : If the fileList contains only one file, the server will get the file rather than an array of one file, which causes issue.

Any idea how can I put the file to an array when there is only one file?

Answer 1

Just generate an array by wrapping your file into brackets...

formData.append('uploads[]', [fileList[i]], names[i])

or to be more precise, names should also be an array I guess:

formData.append('uploads[]', [fileList[i]], [names[i]])