Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"Id":"1","level1":{"level2":{"level3":{"level4":{"level5":{"_id":2}}}}}}]
Query
db.collection.aggregate([{$project:{value:"$level1.level2.level3.level4.level5"}}])
Result