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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})
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WriteResult({ "nInserted" : 1 })
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> db.foo.update({x:1}, {$set: {y:2}})
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WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 0 })
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> db.runCommand( { getLastError: 1, w: 1 } )
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{
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"connectionId" : 22,
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"updatedExisting" : true,
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"n" : 1,
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"syncMillis" : 0,
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"writtenTo" : null,
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"err" : null,
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"ok" : 1
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}
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> db.foo.update({x:3}, {$set:{y:3}}, {upsert:true})
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WriteResult({
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"nMatched" : 0,
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"nUpserted" : 1,
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"nModified" : 0,
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"_id" : ObjectId("555f835e3bd3ad1bd7a14b9f")
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})
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> db.runCommand( { getLastError: 1, w: 1 } )
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{
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"connectionId" : 22,
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"n" : 0,
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"syncMillis" : 0,
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"writtenTo" : null,
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"err" : null,
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"ok" : 1
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}
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Can the number of modified documents be added to the output of getLastError?
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