mongodb - Mongo: select only one field from the nested object -

in mongo store object have field "titlecomposite". field contains array of title object, this:

 "titlecomposite": [  "0": {         "titletype": "01",         "titletext": "test cover uploading"       }  ] 

i'm perfoming query , receive "titletext" value returned values. here example of query:

   db.onix_feed.find({"addedby":201, "mediafilecomposite":{$exists:false}}, {"isbn13":1,"titlecomposite.titletext":1}) 

in results see values like

{    "_id" : objectid("559ab286fa4634f309826385"),    "titlecomposite" : [ { "titletext" : "the nonprofit world" } ],             "isbn13" : "9781565495296"   } 

is there way rid of "titlecomposite" wrapper object , receive titletext? example, take titletext of first element only?

would appreciate help

you can mongodb aggregation achieve expected result. re-arrange query following...

db.onix_feed.aggregate([                {                   $match: {                       $and: [                            {"addedby":201},                            {"mediafilecomposite":{$exists:false}}                       ]                  }                },                {                    $project : { titletext: "$titlecomposite.titletext",                                "isbn13" : 1 }                } ])