Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-8088

$unwind of non-array should be allowed

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.1.0
    • Component/s: Aggregation Framework
    • Labels:
      None
    • Backwards Compatibility:
      Minor Change
    • Operating System:
      ALL

      Description

      This would effectively just output the existing field.

      > db.reg.find()
      { "_id" : 1, "text" : "foo" }
      { "_id" : 2, "text" : "bar" }
      { "_id" : 3, "text" : "Bar" }
      { "_id" : 4, "text" : [ "bar", "foo" ] }
      >db.reg.aggregate({$match:{text:/ba/i}}, {$unwind:"$text"})
      ...
      	"errmsg" : "exception: $unwind:  value at end of field path must be an array",
      	"code" : 15978,
      	"ok" : 0

      This will be important for collections where some document fields may be arrays, but some may not.

        Attachments

          Issue Links

            Activity

              People

              • Votes:
                11 Vote for this issue
                Watchers:
                18 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: