mongdb之mapreduce操作

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统计sn,mac地址在栏目下的点播时长和点播次数

db.getCollection('collectcontents').mapReduce( 
   function() { emit(
  {'sn':this.sn,'mac':this.mac,'columnID':this.actionInfo.columnID},
   {'sn':this.sn,'mac':this.mac,'cpId':this.actionInfo.columnID,playcount:1,'consumeTime':this.actionInfo.consumeTime}); }, 
   function(key, values) {
       var playtime = 0;
        for(var i = 0; i < values.length; i++){
           playtime=playtime+values[i].consumeTime;
         }
         
        key.consumeTime=playtime;
        key.playcount =  values.length;
        
       return key;
       }, 
      {  
         query:{action:"011",'actionInfo.status':7,time: {$gte: '2028-10-10 20:26:43', $lt: '2028-11-28 20:26:43'}},  
         out:"post_total" 
      }
);