From 28796ac7deb9ffb303cb6792b3bbd20138742d9b Mon Sep 17 00:00:00 2001
From: John Ewart <john@unixninjas.org>
Date: Wed, 14 Dec 2011 17:49:08 -0800
Subject: [PATCH] Support :db key for :out in map_reduce

References RUBY-389
---
 lib/mongo/collection.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/mongo/collection.rb b/lib/mongo/collection.rb
index b5b98a5..7cd0b36 100644
--- a/lib/mongo/collection.rb
+++ b/lib/mongo/collection.rb
@@ -624,7 +624,12 @@ module Mongo
       if raw
         result
       elsif result["result"]
-        @db[result["result"]]
+        if result['result'].is_a? BSON::OrderedHash and result['result'].has_key? 'db' and result['result'].has_key? 'collection'
+          otherdb = @db.connection[result['result']['db']]
+          otherdb[result['result']['collection']]
+        else
+          @db[result["result"]]
+        end
       else
         raise ArgumentError, "Could not instantiate collection from result. If you specified " +
           "{:out => {:inline => true}}, then you must also specify :raw => true to get the results."