Question

我有类似的架构：

const UserSchema = new mongoose.Schema({
    skills: [{
        _id: false,
        name: String,
        level: Number,
        exp: Number
    }]
});

示例文档如下：

{
    "_id": {
        "$oid": "5b0941419703f80a121c44df"
    },
    "skills": [
        {
            "name": "woodcutting",
            "exp": 1110,
            "level": 1
        },
        {
            "name": "smithing",
            "level": 0,
            "exp": 0
        },
        {
            "name": "reading",
            "level": 0,
            "exp": 0
        },
        {
            "name": "writing",
            "level": 0,
            "exp": 0
        }
    ]
}

因此，我只需要在一个查询中更新exp和木刻与锻造的水平，如果可能的话，怎么可能？还是我需要更改所有数组并设置（替换）技能值？

Answer 1

您可以在mongodb 3.6中使用arrayFilters

db.collection.update(
  { }, 
  { "$set": {
    "skills.$[skill1].exp": "your_value",
    "skills.$[skill2].level": "your_value",
    "skills.$[skill2].exp": "your_value",
    "skills.$[skill1].level": "your_value"
  }},
  { "arrayFilters": [{ "skill1.name": "woodcutting", "skill2.name": "smithing" }] }
)

更新对象数组猫鼬中的几个对象

1 个答案: