How to find payload in hapi - node.js

Question

I have the following route in hapijs server. And i am trying to create a new file using ajax.
{
method: 'POST',
path: '/create',
config : {
payload:{
maxBytes: 10*1024*1024,
output:'stream',
parse: true,
allow: 'multipart/form-data'
},
handler: function (request, reply) {
var data = request.payload;
if (data.file) { // undefined always
var name = data.file.hapi.filename;
var path = writePath + '/' + name;
var file = fs.createWriteStream(path);
file.on('error', reply);
data.file.pipe(file);
data.file.on('end', function (err) {
reply({
filename: data.file.hapi.filename,
headers: data.file.hapi.headers
});
});
} else reply(boom.badRequest('No file found. Please try again.'));
}
}
The above code always give data.file as undefined. Anything am i missing?
In hapi documentation http://hapijs.com/api#requests, when output is stream
'stream' - the incoming payload is made available via a
Stream.Readable interface. If the payload is 'multipart/form-data' and
parse is true, fields values are presented as text while files are
provided as streams. File streams from a 'multipart/form-data' upload
will also have a property hapi containing filename and headers
properties.
html code :
<form enctype="multipart/form-data" action="/create" method="post">
<input type="file" id="UniqueFileImporter"/>
<input type="submit"/>
</form>
of course there is no js code, as i simply need to submit the form after selecting a file from system

Answer 1

thanks to Matt Harrison for pointing out mistake, i was missing attribute name in file inputer.
html should be
<form enctype="multipart/form-data" action="/create" method="post">
<input type="file" name="file" id="UniqueFileImporter"/>
<input type="submit"/>
</form>