> db.cities.find({ name: 'Atlanta' }).pretty(); { "_id" : ObjectId("4fe82d3044670a8156004ca0"), "geonameid" : 4180439, "name" : "Atlanta", "asciiname" : "Atlanta", "alternatenames" : [ "ATL", "Atlanta", "Atlantae", "aeteullaenta", "arrlanra nagaram", "atalanta", "atlanta", "atlanta", " jwrjya", "atoranta", "etalanta", "etlanta", "ya te lan da", "Ατλάντα", "Атлантæ", "Атланта", "Ատլանտա", "แอตแลนตา", "ཨ་ཊི་ལཱན་ཊཱ།", "အတ္တလန္တာမြို့", "ატლანტა", "アトランタ", "亚特兰大", "애틀랜타" ], "feature_class" : "P", "feature_code" : "PPLA", "country_code" : "US", "admin1_code" : "GA", "admin2_code" : "121", "population" : 420003, "elevation" : 320, "dem" : 336, "timezone" : "America/New_York", "modification_date" : "2011-06-16", "location" : [ -84.38798, 33.749 ] }

demo->cities; $res = $c->aggregate( [ [ '$match' => [ 'name' => 'Atlanta' ] ], [ '$unwind' => '$alternatenames' ], [ '$project' => [ 'name' => '$alternatenames', 'meta' => [ 'elevation' => '$dem', 'population' => 1, 'timezone' => 1, ], 'location' => 1, '_id' => 0, ] ], [ '$sort' => [ 'name' => 1 ] ] ] ); var_dump( $res ); ?>]]>