Direct mongo commands

[Vasiliy Arnautov]

Hello!

How to use direct mongo commands such as aggregate method for mongo collections? TY

[Richard Fielding]

If you only want to do it on the server, you can access the raw mongo collection via a cursor, and then do the aggregation with the raw collection :

// collection is meteor collection

var collectionMongo = collection.find()._mongo.db.collection(collection._name);

collectionMongo['aggregate'](pipeline, cb)

haven't got very far implementing this but it worked basically on the server. On the client it might be more complicated since you have minimongo

Bit of a hack though, would be interested to see other ways of doing it...

[gerard sychay]

There are a few mongo aggregation meteor packages. I've used this one before:

https://atmosphere.meteor.com/package/mongodb-aggregation

And this one appears to enhance that one a bit: 

https://atmosphere.meteor.com/package/mongodb-server-aggregation

HTH,

Gerard

[Vasiliy Arnautov]

I can't use these, because I used SmartCollections instead of regular meteor Collections.

вторник, 14 января 2014 г., 20:22:19 UTC+4 пользователь gerard sychay написал:

[Vasiliy Arnautov]

This is similar as https://github.com/meteor/meteor/pull/644 This works only with Meteor Collections.I can't use Smart Collections and ordinary collections simultaneously =\


вторник, 14 января 2014 г., 5:44:07 UTC+4 пользователь Richard Fielding написал:

[Vasiliy Arnautov]

Let me explain this.
I do 
var Userdata = new Meteor.SmartCollection("userdata");

i cant create
var collection = new Meteor.Collection("userdata");

because i getting Error: A method named '/userdata/insert' is already defined

четверг, 16 января 2014 г., 1:36:04 UTC+4 пользователь Vasiliy Arnautov написал:

[Steve Dossick]

We've been a little bit wary of using atmosphere/meteorite packages in our app before Meteor gets it package story totally nailed down.

For the one place on the server where we needed aggregation (and ensureIndex calls), we use a new instance of MongoInternals.RemoteCollectionDriver.  Yes, we know this _will_ break at some point.

Something like this:

ServerUtils = {};

Meteor.startup(function() {

    ServerUtils.mongoConnection = new MongoInternals.RemoteCollectionDriver(Config.mongoUrl);

});

-s

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[Richard Fielding]

If you only need aggregation on the server, you really only need to access the mongo collection...

In the SmartCollections code I see this

  function createCollection() {
    self._collection = Meteor.SmartMongo.connection.db.collection(collectionName);
    self.emit('ready');
    self._debug('ready');
  }

so you can probably just do mySmartCollection._collection and you'll have the raw mongo collection ready.

and so 

mySmartCollection._collection['aggregate'](pipeline, myCallback); 

might well work

[Vasiliy Arnautov]

MANY THANKS! Problem was solved.

четверг, 16 января 2014 г., 3:44:12 UTC+4 пользователь Richard Fielding написал: