使用猫鼬检索数组中的对象信息答案

【问题标题】：Retrieve object information within an array with mongoose使用猫鼬检索数组中的对象信息
【发布时间】：2021-10-28 11:04:59
【问题描述】：

我正在使用 node、express、typescript 和 mongoose 制作 API Rest。我有一个方法 GET 可以返回这个结果：

{
"success": true,
"status": 200,
"message": "categories listed",
"data": [
    {
        "_id": "612650e55fe1ce0de138e2af",
        "products": [
            {
                "_id": "612650e55fe1ce0de138e2b0",
                "productID": {
                    "reviews": [
                        "611e61ba8cb43f7454787ebb",
                        "611e62008cb43f7454787ebc"
                    ],
                    "_id": "610b18f3e2244a187b36f2d7",
                    "title": "PS4",
                    "description": "La mejor consola del mercado del mundo, mundial",
                    "photo": "https://amazon-clone-jparrot.s3.amazonaws.com/1628123519052",
                    "price": 400,
                    "stockQuantity": 23,
                    "__v": 0,
                    "category": "60fc6454b68717acc239cc6a",
                    "owner": "610b9ed8763da4308223aae0",
                    "averageRating": null,
                    "id": "610b18f3e2244a187b36f2d7"
                },
                "quantity": 1,
                "price": 400
            }
        ],
        "owner": {
            "_id": "611d2d39dfcc705972c1ccb8",
            "name": "Jaume",
            "email": "jaumeparrot2@gmail.com",
            "password": "$2a$10$Rv9Rzrff6578feCdDjyeKuarKCSHYRqKp5n5wTi2IWtcLBOupvPgu",
            "__v": 0,
            "address": "611e9ccdf47c7a7a9cb1d5d9"
        },
        "estimatedDelivery": "Wednesday September 1st",
        "__v": 0
    }
]

}

问题是我需要检索对象“owner”，也就是我需要恢复这个json：

{
"success": true,
"status": 200,
"message": "categories listed",
"data": [
    {
        "_id": "612650e55fe1ce0de138e2af",
        "products": [
            {
                "_id": "612650e55fe1ce0de138e2b0",
                "productID": {
                    "reviews": [
                        "611e61ba8cb43f7454787ebb",
                        "611e62008cb43f7454787ebc"
                    ],
                    "_id": "610b18f3e2244a187b36f2d7",
                    "title": "PS4",
                    "description": "La mejor consola del mercado del mundo, mundial",
                    "photo": "https://amazon-clone-jparrot.s3.amazonaws.com/1628123519052",
                    "price": 400,
                    "stockQuantity": 23,
                    "__v": 0,
                    "category": "60fc6454b68717acc239cc6a",
                    "owner": {
                      "_id": "611d2d39dfcc705972c1ccb8",
                      "name": "Jaume",
                      "about": "My na is Jaume",
                      "__v": 0
                    },
                    "averageRating": null,
                    "id": "610b18f3e2244a187b36f2d7"
                },
                "quantity": 1,
                "price": 400
            }
        ],
        "owner": {
            "_id": "611d2d39dfcc705972c1ccb8",
            "name": "Jaume",
            "email": "jaumeparrot2@gmail.com",
            "password": "$2a$10$Rv9Rzrff6578feCdDjyeKuarKCSHYRqKp5n5wTi2IWtcLBOupvPgu",
            "__v": 0,
            "address": "611e9ccdf47c7a7a9cb1d5d9"
        },
        "estimatedDelivery": "Wednesday September 1st",
        "__v": 0
    }
]

}

为了生成这个 JSON，我使用了这个方法： https://github.com/jparrot92/amazon-clone-back/blob/master/src/controllers/order.ts

【问题讨论】：

你期望的输出是什么？
你能展示你的代码吗？
我的代码在这里：github.com/jparrot92/amazon-clone-back/blob/master/src/…

标签： node.js typescript express mongoose mongoose-populate

【解决方案1】：

这是解决方案：

    const products = await Order.find({ owner: req.user._id })
  .populate('owner')
  .populate({
    path: 'products.productID',
    populate: {
      path: 'owner',
      model: 'Owner',
    },
  })
  .exec();

【讨论】：

【解决方案2】：

要检索您应该使用data.owner。这会将owner 详细信息作为对象。

【讨论】：