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Type: Improvement
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Resolution: Done
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Priority: Minor - P4
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None
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Affects Version/s: None
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Component/s: Write Ops
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None
This came up in DOCS-5491: getLastError.n represents the number of matched documents, but it doesn't return the number of modified documents. For example:
> db.foo.insert({x:1, y:2}) WriteResult({ "nInserted" : 1 }) > db.foo.update({x:1}, {$set: {y:2}}) WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 0 }) > db.runCommand( { getLastError: 1, w: 1 } ) { "connectionId" : 22, "updatedExisting" : true, "n" : 1, "syncMillis" : 0, "writtenTo" : null, "err" : null, "ok" : 1 }
> db.foo.update({x:3}, {$set:{y:3}}, {upsert:true}) WriteResult({ "nMatched" : 0, "nUpserted" : 1, "nModified" : 0, "_id" : ObjectId("555f835e3bd3ad1bd7a14b9f") }) > db.runCommand( { getLastError: 1, w: 1 } ) { "connectionId" : 22, "n" : 0, "syncMillis" : 0, "writtenTo" : null, "err" : null, "ok" : 1 }
Can the number of modified documents be added to the output of getLastError?
- depends on
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SERVER-3409 WriteResult should indicate number of docs modified (no-ops excluded)
- Closed