arrays - Javaドライバーを使用してmongodbの埋め込みドキュメントにコメントをプッシュする方法

Question

私は以下の文書を持っています：

enter code here

{ "_id" : ObjectId("56c49b52a5b24ba2a979a964"),

"FirstName" : "satvik",
"LastName" : "ponakala",
"Major" : "Information Assurance",
"RoomPost" : [
    {
        "postId" : 1,
        "title" : "I have a room to share at Garden Square",
        "comments" : [
            {
                "comment1" : " i want to join",
                "author" : "ashish"
            },
            {
                "comment2" : " already booked",
                "author" : "puneeth"
            }
        ]
    },
    {
        "postId" : 2,
        "title" : "I have a room to share at Ansley Falls",
        "comments" : [
            {
                "comment1" : " How many can stay",
                "author" : "sandeep"
            },
            {
                "comment2" : "can i come there next sunday??",
                "author" : "sandeep"
            }
        ]
    }
]

}

投稿 ID の下のコメント セクションに新しいコメント { "comment3":"push comment from java", "author":"Java" } を追加する方法: 1 from java