更新子文档节点多记录 - Mongodb

Question

我正在尝试更新mongodb集合文档，我需要将最新值更新为“0”，只有其值为“1”

{ 
    "_id" : ObjectId("56411fda7f8b9a4503adeb1e"), 
    "campaigns" : [
        {

            "latest" : NumberInt (0),            
            "timestamp" : "2015-11-10 00:16:10",
          "name" : "camp1",
        }, 
        {
            "latest" : NumberInt(1), 
        "timestamp" : "2015-11-11 00:16:10",
            "name" : "camp2",
        },
      {
            "latest" : NumberInt(1), 
        "timestamp" : "2015-11-12 00:16:10",
            "name" : "camp3",
        }

    ]
}

查询：

db.test.update({"_id" : ObjectId("56411fda7f8b9a4503adeb1e"),'campaigns.latest' : 1},{'$set':{"campaigns.$.latest":0}},{'multi':true});

它只更新第一场比赛而不是全部，请任何人帮助我们解决。