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MongoDB Aggregation Lookup Match Array

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dynamicEntity answered on June 1, 2021 Popularity 10/10 Helpfulness 5/10

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answer MongoDB Aggregation Lookup Match Array

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MongoDB Aggregation Lookup Match Array

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1

db.users.aggregate([
  {"$match":{"_id":ObjectId(..)}},
  {"$lookup":{
    "from":"groups",
    "let":{"_id":"$_id"},
    "pipeline":[
      {"$match":{"$expr":{"$in":["$$_id","$members"]}}},
      {"$unwind":"$members"},
      {"$match":{"$expr":{"$eq":["$$_id","$members"]}}}
    ],
    "as":"members"
  }}
])

Popularity 10/10 Helpfulness 5/10 Language whatever

Source: stackoverflow.com

Tags: lookup match mongodb-aggregation whatever

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dynamicEntity

Contributed on Jun 01 2021

dynamicEntity

0 Answers Avg Quality 2/10

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