[{
    "_id" : ObjectId("55f181e43fdda0be857daaf4"),
    "form_info" : [ 
        {
            "val" : "王思聪",
            "id" : "1"
        }, 
        {
            "val" : "13800138000",
            "id" : "2"
        }
    ],
    "tags" : [],
    "__v" : 0
},
{
    "_id" : ObjectId("55f181e43fdda0f48578acf4"),
    "form_info" : [ 
        {
            "val" : "李丽珍",
            "id" : "1"
        }, 
        {
            "val" : "13934438010",
            "id" : "2"
        }
    ],
    "tags" : [],
    "__v" : 0
}]

如果我想筛选form_info数组内符合 成员对象内id为1,val为王思聪且id为2,val为13800138000 的记录。

即结果是：

[{
    "_id" : ObjectId("55f181e43fdda0be857daaf4"),
    "form_info" : [ 
        {
            "val" : "王思聪",
            "id" : "1"
        }, 
        {
            "val" : "13800138000",
            "id" : "2"
        }
    ],
    "tags" : [],
    "__v" : 0
}]

该怎么写好？ 谢谢大大们