mongoose populate 似乎不起作用。困惑我已經(jīng)兩天了

問題描述

mongoose populate 似乎不起作用, 另人疑惑的是, 我在項目另一個地方使用，它是正常的

問題出現(xiàn)的環(huán)境背景及自己嘗試過哪些方法

mongodb: 4.0.1
mongoose: 5.2.9

相關代碼

// dinner.model.js
const mongoose = require('mongoose')
const Schema = mongoose.Schema

const DinnerSchema = new Schema({
  name: {
    type: String
  },
  content: {
    type: [{
      type: Schema.Types.ObjectId,
      ref: 'Food'
    }]
  }
})

const Dinner = mongoose.model('Dinner', DinnerSchema, 'dinners')

module.exports = Dinner

// food.model.js

const mongoose = require('mongoose')
const Schema = mongoose.Schema

const FoodSchema = new Schema({
  name: {
    type: String
  }
})

const Food = mongoose.model('Food', FoodSchema, 'foods')

module.exports = Food

router.get('/test', async (ctx, next) => {
  const result = await DinnerModel.find().populate({
    path: "foods"
  })
  ctx.result = {
    code: 200,
    data: {
      list: result,
      msg: 'success'
    }
  }
  await next()
})

你期待的結(jié)果是什么？實際看到的錯誤信息又是什么？

是什么原因?qū)е碌模?/p>