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  1. Documentation
  2. DOCS-1631

Comment on: "manual/reference/aggregation/group.txt"

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    • Resolution: Done
    • Icon: Major - P3 Major - P3
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    Description

      Any expression (things usable in $project) are also valid as the _id field and as input to the accumulators. FieldPaths, Objects, and Constants are just particular types of expressions, there is nothing special about them.

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            kay.kim@mongodb.com Kay Kim (Inactive)
            mathias@mongodb.com Mathias Stearn
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              Created:
              Updated:
              Resolved:
              10 years, 22 weeks, 1 day ago