使用MongoDB Java将新对象推入现有文档的数组中

2024-05-21 • 问答

我正在尝试学习MongoDB，并且想知道如何将POJO插入现有集合中。我的收藏如下。

{
        "_id" : ObjectId("5e930d68618c45b052492407"),"game" : {
                "team1" : [ 
                    { "player" : "john","age" : 25 },{ "player" : "mick","age" : 25 }
                ],"team2" : [ 
                    { "player" : "john",{ "player" : "john","age" : 25 }
                ]
            }
}

现在，我希望能够在“ team1”中插入一个新的播放器，并且预期的输出应如下所示，

{
        "_id" : ObjectId("5e930d68618c45b052492407"),"age" : 23 },{ "player" : "tom","age" : 22 }   //newly inserted
                ],"team2" : [ 
                    { "player" : "tony","age" : 26 },{ "player" : "bruce","age" : 24 }
                ]
            }
}

我在Java中使用过POJO，下面是我的代码，

Player object= new Player();
newPlayer.setPlayer("tom");
newPlayer.setage(22);

BasicDBObject setQuery = new BasicDBObject();
setQuery.append("$push",object);

collection.updateone(Filters.and(Filters.eq("_id","5e930d68618c45b052492407"),Filters.eq("game.team1")),setQuery);

但是以上方法似乎无效，因此请求我提供帮助。如果您发现我的问题有任何错误，请原谅。谢谢。

BasicDBObject query = new BasicDBObject(); query.put("_id",valueofId); BasicDBObject push_data = new BasicDBObject("$push",new BasicDBObject("game.team1",object)); collection.findOneAndUpdate(query,push_data);

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使用MongoDB Java将新对象推入现有文档的数组中

fdsafdsaga 回答：使用MongoDB Java将新对象推入现有文档的数组中

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