在MongoDB中的架构和查询之间创建引用，以从相同的模式中获取数据

问：

以下是我正在使用的两个架构： UserSchema

import mongoose from "mongoose";
const UserSchema = new mongoose.Schema(
  {
    _id: {
      type: Schema.Types.ObjectId,
    },
    name: {
      type: String,
      required: true,
    },
    email: {
      type: String,
      required: true,
      // match: /.+\@.+\..+/,
      unique: true,
    },
    phoneNumber: {
      type: String,
      unique: true,
    },
    image: {
      type: String,
    },
    password: {
      type: String,
      unique: true,
      required: true,
    },
    tokens: [{ type: Object }],
    code: String,
    accountType: {
      type: String,
    },
    isAdmin: {
      type: Boolean,
      default: false,
    },
    location: {
      type: String,
    },
    coords: { type: Object },
    isEditor: {
      type: Boolean,
      default: false,
    },
    isVerified: {
      type: Boolean,
      default: false,
    },
    isSuspended: {
      type: Boolean,
      default: false,
    },
  },
  { timestamps: true }
);

export default mongoose.model("User", UserSchema);

评论架构

import mongoose from "mongoose";

const ReviewsSchema = new mongoose.Schema(
  {
    writer: {
      type: mongoose.Schema.Types.ObjectId,
      ref: "User",
    },
    body: {
      type: String,
      required: true,
    },
    rating: {
      type: Number,
      required: true,
    },
  },
  { timestamps: true }
);

export default mongoose.model("Reviews", ReviewsSchema);

如何创建控制器函数来获取与特定用户关联的评论？

以下是我用来获取单个评论的控制器函数：reviewController，.js

export const getReview = async (req, res, next) => {
  try {
      const review = await Reviews.findById(req.params.id);
      res.status(200).json({ success: true, review });
    } catch (err) {
      next(err);
    }
};

当我使用 Postman 测试 api 端点时，以下是我得到的结果：

{
"success": true,
"review": {
    "_id": "654c2568df670257734ee11c",
    "body": "MechLocator has helped me big time",
    "rating": 0.95,
    "createdAt": "2023-11-09T00:18:48.080Z",
    "updatedAt": "2023-11-09T00:18:48.080Z",
    "__v": 0
}

}

如您所见，我没有从对服务器的调用中填充 writer 字段。我希望看到此字段填充了与此评论关联的用户的 ObjectId。

我做错了什么？