我试图通过使用populate来获取嵌套数据（一个大模式有许多属性，其中一个属性就像另一个模式的id数组）。我想通过使用id来查找嵌套模式。
第一个模式-扇区：

const mongoose = require("mongoose");

const Schema = mongoose.Schema;

const sectorsSchema = new Schema({
  title: { type: String, required: true },
  description: { type: String, required: true },
  img: { type: String, required: true },
  poc: { type: String, required: true },
  PhoneNum: { type: String, required: true },
  EmailPOC: { type: String, required: true },
  subSectors: [
    { type: mongoose.Types.ObjectId, required: true, ref: "subSectors" },
  ], //store all objectId of Place as an array
  file_gallery: [
    { type: mongoose.Types.ObjectId, required: true, ref: "Files" },
  ], //store all objectId of Place as an array
  web_id: { type: mongoose.Types.ObjectId, required: true, ref: "MainContent" },
});

module.exports = mongoose.model("sectors", sectorsSchema);

字符串
文档示例：x1c 0d1x的数据
和分部门：

const mongoose = require("mongoose");

const Schema = mongoose.Schema;

const subSectorsSchema = new Schema({
  title: { type: String, required: true },
  desc: { type: String, required: true },
  img: { type: String, required: true },
  poc: { type: String, required: true },
  PhoneNum: { type: String, required: true },
  EmailPOC: { type: String, required: true },
  QnA: [{ type: mongoose.Types.ObjectId, required: true, ref: "QnA" }], //store all objectId of QnA as an array
  file_gallery: [
    { type: mongoose.Types.ObjectId, required: true, ref: "Files" },
  ], //store all objectId of Files as an array
  sector_id: { type: mongoose.Types.ObjectId, required: true, ref: "sectors" },
  web_id: { type: mongoose.Types.ObjectId, required: true, ref: "MainContent" },
});

module.exports = mongoose.model("subSectors", subSectorsSchema);

型
文档示例：

的
正如你所看到的，这两个文档之间有一个连接（每个扇区可以有许多子扇区）。
我试图通过使用mongoose的populate方法来获取subSector。这是我的代码，但它不工作…

const subSectorId = req.params.subSectorid;
  const sectorId = req.params.sectorid;
  let sector;
  try {
    sector = await Sectors.findById(sectorId)
      .findOne({ _id: subSectorId })
      .populate("subSectors");
  } catch (err) {
    const error = new HttpError(
      "Something went wrong, could not delete sector.",
      500
    );
    return next(error);
  }

  if (!sector) {
    const error = new HttpError("Could not find sector for this id.", 404);
    return next(error);
  }

型
我得到的回应：“message”：“找不到此ID的扇区。”
我发送的参数是（你可以在图像中看到，它们属于我附上的文档照片）：

const subSectorId = 62dd1c9f720d07f2488c65a3
const sectorId = 62dd21a82bf3289ef6f08219

型
谢谢你的好意