$unwind of non-array should be allowed

XMLWordPrintableJSON

    • Type: Bug
    • Resolution: Done
    • Priority: Major - P3
    • 3.1.0
    • Affects Version/s: None
    • Component/s: Aggregation Framework
    • None
    • Minor Change
    • ALL
    • None
    • 3
    • None
    • None
    • None
    • None
    • None
    • None

      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.

            Assignee:
            Eliot Horowitz (Inactive)
            Reporter:
            Scott Hernandez (Inactive)
            Votes:
            11 Vote for this issue
            Watchers:
            17 Start watching this issue

              Created:
              Updated:
              Resolved: