meteor - Grouping by property value (and counting?) in MongoDB -


i'm using meteor web project, , need find way group (and count) records in collection 1 of properties. sample record collection ned from:

{     "owner" : "7ynnwsc3e3itcrhcc",     "isbn" : "1551110881",     "title" : "introduction",     "type" : "0",     "class" : "adnr1234",     "condition" : "0",     "active" : false,     "createdat" : isodate("2014-08-18t15:38:30.012z"),     "tradefor" : {         "isbn" : "7463849506",         "title" : "intro 2"     },     "_id" : "rfzvedlkyxt5emq7s" }

i know need figure out way do...i guess it's called aggregation? anyway...the property i'm needing use "class". need way go through whole collection , let me output each class (adnr1234) number of records have each used class value.

i hope didn't ask question poorly, i'm sort of new meteor, , seems sort of weird problem try solve.

officially aggregation not supported.

however people started solve issue:

http://atmospherejs.com/package/mongodb-aggregation?q=aggregation https://github.com/meteor/meteor/pull/644


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