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  1. Core Server
  2. SERVER-28896

$lookup should work right with array dot notation in localField

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Duplicate
    • 3.4.3
    • None
    • Aggregation Framework
    • None
    • ALL
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      db.test.drop()
       
      db.test.insert({ "_id" : 1, "aa" : [ "bb" : { "id" : "1611e293-61c4-4028-b6fd-c5909247b020", "type": "form_charger" } ] })
       
      db.form_charger.insert({ "_id" : 1, "id" : "1611e293-61c4-4028-b6fd-c5909247b020" })
       
      db.test.aggregate([{ '$lookup': { from: 'form_charger', localField: 'aa.0.bb.id', foreignField: 'id', as: 'data_bb' } }])
      
      

      The result of *data_bb* always empty.

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      db.test.drop()   db.test.insert({ "_id" : 1, "aa" : [ "bb" : { "id" : "1611e293-61c4-4028-b6fd-c5909247b020", "type": "form_charger" } ] })   db.form_charger.insert({ "_id" : 1, "id" : "1611e293-61c4-4028-b6fd-c5909247b020" })   db.test.aggregate([{ '$lookup': { from: 'form_charger', localField: 'aa.0.bb.id', foreignField: 'id', as: 'data_bb' } }]) The result of * data_bb * always empty.

    Description

      The $lookup stages now not work with dot notation when the path point into an embedded array.

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              david.storch@mongodb.com David Storch
              futurist Jame Yang
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                Created:
                Updated:
                Resolved: