how to add attachments in email package in Meteor - meteor

Question

It looks like the email package in Meteor now allows adding attachments similar to how MailComposer does. On my server I have:
Meteor.startup( function() {
process.env.MAIL_URL = "smtp://<my maligun info here>";
});
Meteor.methods({
sendEmail: function (to, from, subject, text, attachment) {
// Let other method calls from the same client start running,
// without waiting for the email sending to complete.
this.unblock();
Email.send({
to: to,
from: from,
subject: subject,
text: text,
attachment: attachment
});
}
});
Inside the app I'll have a helper like:
Template.donateEmail.events({
'click #send-donate-email': function() {
var attachment = {
fileName: "Demographics3.numbers",
filePath: "/Users/Opal/Desktop/Demographics3.numbers"
};
var emailCompose = document.getElementById('compose-donate-email').value;
var emailSubject = document.getElementById('subject-donate-email').value;
Meteor.call('sendEmail',
"some#email.com", //Session.get('keyDonateEmailSendList'),
'some2#email.com',
emailSubject,
emailCompose,
attachment)
}
});
I can get emails to send, but sending but there's no attachments. And the documentation is confusing. Anyone have any more info on this? I'm missing something somewhere.

Answer 1

Problem solved. Two mistakes in my code. In the Email.send method, it needs to read
"attachments: <some name>" not "attachment: <some name>".
The second issue is the making sure one specifies the correct absolute path, which in my case on a Mac would be:
"Volumes/Macintosh\ HD/Users/Opal/Desktop/<filename>"
I have found that Apple .numbers files aren't openable, but they will attach. Other files should be OK.