如何查找和更新文档数组中的对象

Question

我已经绝望了几天，因为我正在寻找一种方法来更新数组中的对象这是我的代码的一小段摘录

{
  "_id": {
    "$oid": "62684e70e89eca781cc4f384"
  },
  "user": "ronen",
  "roles": {
    "User": 2001,
    "Editor": 1984,
    "Admin": 5150
  },
  "password": "b$pO52RJD0zgFHDW6BBCo5iu3A5Lx0TCbCbzgjvc3FxxQZGUjblSPaK",
  "Stock": [
    {
      "sku": "777",
      "productname": "rone4n",
      "sendout": 5,
      "recived": 3,
      "totalinstock": 55,
      "location": "A770770",
      "_id": {
        "$oid": "626a9bb384cd350c6e784794"
      }
    },
    {
      "sku": "ex77xee",
      "productname": "ron",
      "sendout": 43,
      "recived": 34,
      "totalinstock": 444,
      "location": "fff",
      "_id": {
        "$oid": "626adab728fcc6005453a481"
      }
    }
  ],
 
}

我想 return 唯一 where "sku": "ex77xee" 不知道如何在数组中搜索对象

{
      "sku": "ex77xee",
      "productname": "ron",
      "sendout": 43,
      "recived": 34,
      "totalinstock": 444,
      "location": "fff",
      "_id": {
        "$oid": "626adab728fcc6005453a481"
      }

我更喜欢在 MongoDB 方面这样做，我尝试使用 findONe 但我没有成功

Answer 1

您可以运行这个查询，您可以阅读更多关于 $elemMatch here

db.collection.find({
  stock: {
    $elemMatch: {
      sku: "ex77xee"
    }
  }
},
{
  "stock.$": 1,
  "user": 1, //<-- You can remove this, if you don't want these values
  "roles": 1, //<-- You can remove this, if you don't want these values
  "password": 1 //<-- You can remove this, if you don't want these values
})

你可以查看mongo playground here

$elemMatch 非常通用，如果需要，您可以稍后添加更多条件进行过滤

如何查找和更新文档数组中的对象

How do you fin and update objects in a document's array

node.js

mongoose