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Type:
Bug
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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: 2.1.0
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Component/s: MapReduce
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ALL
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When using the "scope" option with a function that has formed a closure, the map function will break this closure and throw a ReferenceError when the supplied function is invoked.
This may be done intentionally... the docs are a bit sparse with regards to the "scope" option.
See the following:
test.js
> db.collection.save({})
> fn = function(){ var x = 1; return function(){ return x; }}()
function () {
return x;
}
> fn()
1
> db.collection.mapReduce(function(){fn()}, function(){}, {out:'inline', scope:{fn:fn}})
Fri Mar 23 12:52:59 uncaught exception: map reduce failed:{
"assertion" : "map invoke failed: JS Error: ReferenceError: x is not defined nofile_b:1",
"assertionCode" : 9014,
"errmsg" : "db assertion failure",
"ok" : 0
}
>