Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"selectedIds":[1,2,3],"currentId":1},{"selectedIds":[1,2,3],"currentId":4}]
Query
db.collection.aggregate([{"$match":{"$expr":{"$in":["$currentId","$selectedIds"]}}}])
Result