MongoDB: query or aggregate to get different measure data into array in one shot -


i have time series document store device's multiple sensor data/1/. in example, deviceid a-1 has

1)geo info("longitude" : 0.6644560403052914, "latitude" : 0.7165033050936503 ), 2)temperature, ("sensortype" : "temperature","sensorvalue" : "14") 3)humidity, ("sensortype" : "humidity", "sensorvalue" : "12") 

the query based on time range according createdate, how use 1 query or 1 aggregation 3 arrays of geo info, temperature , humidity , how choose index , index type?

/1/data structure

{         "_id" : "7736b113586a4314bfbe036cf6b3e34c",         "createdate" : isodate("2016-08-30t16:30:33.007z"),         "deviceid" : "a-1",         "vendorcode" : "01",         "longitude" : 0.6644560403052914,         "latitude" : 0.7165033050936503,          "sensorlist" : [                 {                         "_id" : "1802b2792cac4529b269d5e2c9398e80",                         "createdate" : isodate("2016-08-30t16:30:33.007z"),                        "sensortype" : "temperature",                         "sensorid" : 1,                         "sensorvalue" : "14"                 },                 {                         "_id" : "ddbe2d76770c42cfabc8d22d7c732826",                         "createdate" : isodate("2016-08-30t16:30:33.007z"),                         "sensortype" : "humidity",                         "sensorid" : 2,                         "sensorvalue" : "12"                 }         ] } 

this isn't answer yet wanted show got. i'm little stumped doing within 1 aggregation.

> db.foo.aggregate([ ...     // first project out fields don't need.  geoinfo requires latitude , longitude let's take care of first. ...     {"$project": {"_id": 0, "geoinfo": {"longitude": "$longitude", "latitude": "$latitude"}, "sensorlist": 1}}, ...     // let's group based on sensortype, need unwind our array first ...     {"$unwind": "$sensorlist"}, ...     {"$group": { ...         "_id": "$sensorlist.sensortype", ...         "value": {"$first": "$sensorlist.sensorvalue"}, ...         "geoinfo": {"$push": "$geoinfo"} ...     }} ... ]);  { "_id" : "humidity", "value" : "12", "geoinfo" : [ { "longitude" : 0.6644560403052914, "latitude" : 0.7165033050936503 } ] }  { "_id" : "temperature", "value" : "14", "geoinfo" : [ { "longitude" : 0.6644560403052914, "latitude" : 0.7165033050936503 } ] } 

Comments

Popular posts from this blog

java - Jasper subreport showing only one entry from the JSON data source when embedded in the Title band -

mapreduce - Resource manager does not transit to active state from standby -

serialization - Convert Any type in scala to Array[Byte] and back -