Sails.js upload file - Cannot get file on req.file()

I just begin with Sailsjs and I tried to make a simple file upload. In sails I do like

uploadFile: (req, res) => {
                req.file('test').upload({
                        dirname: '../../assets/uploads'
                }, function (err, uploadedFiles){
                        if (err) return res.serverError(err);
                        return res.json({
                                message: uploadedFiles.length + ' file(s) uploaded successfully!',
                                files: uploadedFiles
                        });
                });
        }

And in the postman I did like this Upload file via postman

The thing is after I upload file via postman I get no file in req.file(). But while I console.log(req) I actually did see the file's binary(some sorts like that). I just cannot figure out what happened.

via 蔡一鸣