self.autorun

gistfile1.txt

Template.messages.helpers({
    'messages': function(){
        return roomComments.find();
    },
    'members': function(){
        var members =  Posts.find({roomId:Session.get('selectedChat')},{fields:{members:1}}).fetch()[0].members;
        return members;
    }
});

Template.messages.onRendered(function() {

    var self = this;
    self.autorun(function() {
        self.subscribe('messages', Session.get('selectedChat'));
    });

    function scrollDown(){
        $('.chats-item-messages').stop().animate({
            scrollTop: $(".chats-item-messages")[0].scrollHeight
        }, 800);
    }


    roomComments.find().observeChanges({
        'added':function(id,doc){
            scrollDown();
        }
    });
});