db.test1.group({key:{id:1},cond:{user:"gjx"},reduce: function ( curr, result ) { result.user=curr.user },initial: {}})
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db.test1.group({key:{id:1},cond:{user:"gjx"},reduce: function ( curr, result ) { result.user=curr.user },initial: {}})
转载于:https://my.oschina.net/comguo/blog/270345