javascript - JSON 更新对象内部的数组

Question

这是我的 JSON 响应:

"_id" : 537,
    "quizzes" : [
        {
            "wk" : 1,
            "score" : [
                10
            ]
        },
        {
            "wk" : 2,
            "score" : [
                8
            ]
        },
        {
            "wk" : 3,
            "score" : [
                5
            ]
        },
        {
            "wk" : 4,
            "score" : [
                6
            ]
        }
    ]
}

我正在尝试更新其中一个对象内的分数数组，这是我的尝试:

db.collection('connect').update({_id: id}, {$push: { quizzes[0]: { score: 89  }  }});

Answer 1

尝试以下更新:

db.collection("connect").update(
    {
        "_id": id            
    }, 
    {
        "$set": { 
            "quizzes.0.score.0": 89    
        }
    }
);

它使用 dot notation 访问数组的元素以及访问嵌入文档的字段。

To access an element of an array by the zero-based index position, concatenate the array name with the dot (.) and zero-based index position, and enclose in quotes:

'<array>.<index>'