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  1. Core Server
  2. SERVER-14160

Cannot project subfield of _id

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Details

    • Improvement
    • Status: Closed
    • Minor - P4
    • Resolution: Duplicate
    • 2.4.10, 2.6.1
    • None
    • Querying
    • None
    • Query

    Description

      if _id is an object you cannot project out on of it's members in a normal projection, you can using $project in aggregation

      > db.foo.insert({_id:{a:1,b:1}})
      WriteResult({ "nInserted" : 1 })
      > db.foo.find({},{_id:0,"_id.a":1})
      {  }

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              backlog-server-query Backlog - Query Team (Inactive)
              john.page@mongodb.com John Page
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                Created:
                Updated:
                Resolved: