Multer not accepting files in array format gives 'Unexpected File Error'

Question

Multer is a module used along with node js and express to upload files. I am using ng-file upload module on the angular side.

When I am sending multiple files one b

Answer 1

The reason for the error is that multer currently does not support the array syntax that ng-file-upload uses by default which is files[0], files[1], files[2], etc. multer is expecting a series of files with the same field name.

The easiest solution is to set ng-file-upload's arrayKey option like so to avoid appending the [index] part:

Upload.upload({
  url: '/api/data/addtweet',
  arrayKey: '', // default is '[i]'
  data: {
    files: files
  }
})