使用 mongoose 和 Express/Node Js 获取数据

Question

i am trying to fetch data from a MongoDB database using mongoose and express in Node js , i created the Model and successfully connected to database but the problem is i am getting an empty response while there already documents in the database collection .

Model class :

const mongoose = require("mongoose");
const RendezvousSchema = mongoose.Schema({
    idpatient: {
        type: String,
        required: true
    },
    idmedecin: {
        type: String,
        required: true
    },
});

module.exports = mongoose.model("Rendezvous", RendezvousSchema);

index.js :

const express = require("express");
const router = express.Router();
const Rendezvous = require("../model/RendezVous");
/* Get Rendez Vous By id */
/**
 * @method - GET
 * @description - Get Rendez vous Medecin
 * @param - /user/GetRdvMedecin
 */
router.get("/GetRdvMedecin", async (req, res) => {
  try {
    const rdv = await Rendezvous.find();
    res.json(rdv);
    console.log('Fetched');
  } catch (e) {
    res.send({ message: "Error in Fetching rendez vous" });
  }
});
/* Get Rendez Vous By id*/
module.exports = router;

this is the console.log :

Server Started at PORT 4000
Connected to DB !!
Fetched

Postman GET request on : ' http://localhost:4000/user/GetRdvMedecin '

Postman Response : ' [] '

document sample :

{
  "_id":{
    "$oid":"5e7396787b32a12e38a7aa7d"
  },
  "idpatient":"5e6ce11bc31de6132ca454a1",
  "idmedecin":"5e5aa519190d8c2818a66a0a"
}

Hint : when i used another model ('user') it works fine and returns a response .

Answer 1

Your request .find() could return more than one object, I always return something like this:

router.get("/GetRdvMedecin", async (req, res) => {
 let results;
 try {
    results = await Rendezvous.find();
  } catch (e) {
    res.send({ message: "Error in Fetching rendez vous" });
  }
  res.json({rendezvous: results.map(result => result.toObject({getters: true}) )});
});

Answer 2

Solved by adding the name of collection in the model

const mongoose = require("mongoose");

const RendezvousSchema = mongoose.Schema({
    idpatient: {
        type: String
    },
    idmedecin: {
        type: String
    }
},{
    collection: 'Rendezvous'
});

// export model user with UserSchema
module.exports = mongoose.model("Rendezvous", RendezvousSchema);