无法使用Mongodb Java驱动程序更新内部Arraylist对象 [英] Unable to update Inner Arraylist object using Mongodb Java Driver

问题描述

我在mongodb数据库中具有以下文档结构:

I have below document structure in mongodb database:

{
    "_id" : ObjectId("52ec7b43e4b048cd48499b35"),
    "eidlist" : [
        {
            "eid" : "64286",
            "dst" : NumberLong(21044),
            "score" : 0
        },
        {
            "eid" : "65077",
            "dst" : NumberLong(21044),
            "score" : 0
        }
    ],
    "src" : NumberLong(21047)
}

我想使用Java-mongodb驱动程序更新第一个对象的得分字段: 我尝试了以下代码，但它不起作用:(:

I would like to update score field of first object using Java-mongodb driver: I tried following code but it is not working :( :

  DBObject update_query=new BasicDBObject("src", key).append("eidlist.eid", e.getEdgeid());
  DBObject data=new BasicDBObject("$set",new BasicDBObject("eidlist.score",100));
 coll.update(update_query, data);

请帮助我解决这个问题..我已经检查了传递给更新函数的所有参数.我认为更新逻辑有问题:(

Please help me to solve this problem..I have checked all the parameter which I have passed to update function.I think something wrong with the update logic :(

推荐答案

您已经关闭.您从更新中省略了位置运算符.如图所示编辑代码.

You were close. You omiited the positional operator from the update. Edit your code as shown.

DBObject data=new BasicDBObject("$set",new BasicDBObject("eidlist.$.score",100));

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