Difficulty populating file data after document insertion

[uttahb]

I am using Meteor 1.3.2 and client side I am using angular. When I try to upload with meteor collection, its creating a zero length file document in collection but its not getting updated with full file data.

[vsivsi]

I really can't help without seeing code. Are you actually uploading the file data somehow? How?
See also: #144

There are also working sample apps, I suggest you examine how they work, if you haven't already.
Simple:
https://github.com/vsivsi/meteor-file-sample-app
More complex:
https://github.com/vsivsi/meteor-file-job-sample-app