我想将元素推送到一个mongo数组，我有这个查询应该与当前版本的meteor mongo（2.6.7） .

这是查询：

Coll.upsert({},{ $push: {
                   'events': {
                       $each: [{'id': new Mongo.ObjectID, 'start':startDate, ... }],
                       $sort: {'start': 1}
                   }
           }});

...这里是minimongo错误...打印到服务器控制台！

I20151117-13:51:54.730(11)? Exception while invoking method 'addReservationTimeslot' MinimongoError: $sort requires $slice to be present
I20151117-13:51:54.731(11)?     at MinimongoError (packages/minimongo/packages/minimongo.js:52:1)
I20151117-13:51:54.732(11)?     at MODIFIERS.$push (packages/minimongo/packages/minimongo.js:3244:1)
I20151117-13:51:54.732(11)?     at packages/minimongo/packages/minimongo.js:3052:1
I20151117-13:51:54.732(11)?     at Function._.each._.forEach (packages/underscore/packages/underscore.js:142:1)
I20151117-13:51:54.732(11)?     at packages/minimongo/packages/minimongo.js:3027:1
I20151117-13:51:54.732(11)?     at Function._.each._.forEach (packages/underscore/packages/underscore.js:142:1)
I20151117-13:51:54.732(11)?     at Function.LocalCollection._modify (packages/minimongo/packages/minimongo.js:3020:1)
I20151117-13:51:54.732(11)?     at simulateUpsertWithInsertedId (packages/mongo/mongo_driver.js:670:1)
I20151117-13:51:54.732(11)?     at [object Object].MongoConnection._update (packages/mongo/mongo_driver.js:537:1)
I20151117-13:51:54.732(11)?     at [object Object].<anonymous> (packages/meteor/helpers.js:118:1)

我可能错过了一些关于minimongo < - > mongo连接的东西，但是服务器端方法怎么可能受到minimongo实现的限制呢？

mongodb meteor minimongo