Ember Limit hasMany fetch

Let's say I have this model:

// app/models/user.js
export default DS.Model.extend({
  name: DS.attr('string'),
  messages: DS.hasMany('message')
});

When I use user.get('messages'), it will return all records inside it even if it's a million. I only want to get the last 20 or the first 20 of the record to save network data.

I can't use query because of security issues. I don't want other users to be able to query a user's private messages.

I'm looking for a client side only solution through Ember. Is that possible?