meteor - Uncaught TypeError on the server but works on the client -

when run this:

  var vtop=posts.findone({},{sort: {created_at:-1},reactive:false}).created_at;   console.log(vtop);  

it comes error: "uncaught typeerror: cannot read property 'created_at' of undefined", when run posts.findone({},{sort: {created_at:-1},reactive:false}).created_at; on web console comes expected result.

you need make sure subscriptions complete before call data.

in meteor data sent on wire, when javascript/html sent down browser hasn't yet been told download data server.

there 2 ways round this:

if you've not yet reached stage you're using subscriptions app can use deps.autorun

using deps

deps.autorun(function() {     var subscribed = session.equals("subscribed",true);     if(!subscribed && posts.find().count()) {         session.set("subscribed",true);          var vtop = posts.findone({},{sort: {created_at:-1},reactive:false}).created_at;         console.log(vtop)     } 

or wait subscription finish

server js

meteor.publish("posts", function() {     return posts.find(); } 

client js

meteor.subscribe("posts",function() {     var vtop = posts.findone({},{sort: {created_at:-1},reactive:false}).created_at;     console.log(vtop) }); 

if using publish/subscribe need remove autopublish package if need publish other collections or browser won't see them.

for more on how use publish see docs: http://docs.meteor.com/#publishandsubscribe

the parties example uses publish , has screencast : http://meteor.com/examples/parties