怎样删除mongodb数组里面重复的数据

[mmkkuoi]

db.test.insert(｛
    "confData":[
     {
        "name":"blkIcon",
       "value":""
     },{
        "name":"111111",
       "value":""
     },{
        "name":"blkIcon",
       "value":""
     }
   ]
｝)
db.test.insert(｛
    "confData":[
     {
        "name":"blkIcon",
       "value":""
     },{
        "name":"2222222",
       "value":""
     },{
        "name":"blkIcon",
       "value":""
     }
   ]
｝)
db.test.insert(｛
    "confData":[
     {
        "name":"3333333333",
       "value":""
     },{
        "name":"blkIcon",
       "value":""
     }
   ]
｝)

db.test.insert(｛
    "confData":[
    {
        "name":"blkIcon",
       "value":""
     }
   ]
｝)

怎样去掉confData.name存在blkIcon重复的数据，第一条和第二条就需要去掉一个name=blkIcon的

[mmkkuoi]

请大神协助下

[rucypli]

db.test.find().forEach( function(row) { var disarr = db.test.distinct( 'confData', { _id: row._id } ) db.test.update( { _id: row._id }, {$set: {confData: disarr}}) } )