lookup in mongodb array
> db.demo396.aggregate([
... { "$lookup": {
... "from": "demo395",
... "let": { "details": "$details" },
... "pipeline": [
... { "$match": { "$expr": { "$in": [ "$_id", "$$details" ] } } }
... ],
... "as": "output"
... }}
... ])lookup in mongodb array
{ "_id" : ObjectId("5e5e787817aa3ef9ab8ab209"), "details" : [ ObjectId("5e5e782317aa3ef9ab8ab207"), ObjectId("5e5e782317aa3ef9ab8ab208") ], "output" : [ { "_id" : ObjectId("5e5e782317aa3ef9ab8ab207"), "Name" : "Chris" }, { "_id" : ObjectId("5e5e782317aa3ef9ab8ab208"), "Name" : "David" } ] }Copyright © 2021 Codeinu
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