meteor - Extending Mongo.Collection breaks find() method -

following excellent meteor guide have tried play extending collection. ultimate aim create objects manage insertion , update values updated. i've tried order class:

order = class order {   constructor(customerid, orderdate){     this.document = {};     this.document.customerid = customerid;     this.document.orderdate = orderdate;     this.document._id = orders.insert(this.document);   }    // class methods go here. } 

my orders uniquely defined customer id , date. cannot make 2 orders on same day. therefore i've extended mongo.collection class own ordercollection class. sort of abstracts data layer ensure data therein remains remains unique it's key:

class ordercollection extends mongo.collection{    constructor(collectionname){     super(collectionname);     this.attachschema(       new simpleschema({         customerid: { type: string },          orderdate: { type: date }       })     );     }    insert(list, callback){     // check if actual order exists     if (list._id){       return _id;     }      // won't insert new order if matching 1 exists.      var order = orders.findone({       customerid: list.customerid,       orderdate: list.orderdate     });     if (order){return order._id;}      // create order , return it.      return super.insert(list, callback);   }    remove(selector, callback){     return super.remove(selector, callback);   } }  orders = new ordercollection("orders"); 

this seems work. when create new order it's either creating new one, or returns existing 1 correct _id. example when run meteor reset , enter new order retrieve same _id when stop meteor, restart , try same insert again:

{ document:                                                                                                                                                                                                       { customerid: 'qb6reejirgxs3oj6r',                                                                                                                                                                               orderdate: fri jan 29 2016 00:00:00 gmt+0000 (gmt),                                                                                                                                                            _id: 'awmygyspnxr86ks6d' } } 

this , behaving expected. cannot seem retrieve objects through subscriptions or calls orders.find({}).fetch() either on client.

even msavin:mongol tells me orders collection empty , if add new items through monogl interface, don't appear. doing wrong?

update

i'm using simpleschema , collections2 , wonder if somehow may not support way use this.

this beginner's issue. above worked, issue subscription on client, instead of instance.autorun(function...) had written instance.autorun = function...