回调未在nodejs中获取记录

Posted 2023-03-07

【中文标题】回调未在nodejs中获取记录

【英文标题】：callback not fetching record in nodejs

【发布时间】：2018-09-01 01:17:25

【问题描述】：

我想在postman 中传递电子邮件，并想将获取的json data 打印到console。但它不是fetching any data。所以帮我解决这个问题

mongoconnect.js

var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";
var dbo=null;

exports.connection=function()
    if(dbo!=null) return 

  MongoClient.connect(url, function(err, db) 
  if (err) throw err;
   dbo = db.db("hospital_api");

);


var get = function ()
    return dbo;


exports.email=function(r)
    get().dbo.collection("doctor").find("email":r).toArray(function(err,result)
    
        if(err) throw err;
        console.log(result)
        return result;
    )

医生.js

var express = require('express');
var router = express.Router();

var bodyParser = require("body-parser");
var validator = require('validator');
var mongo= require('./mongoconnect')
var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded( extended: true ));
router.post('/',function(req,res)
    
        d=mongo.email(req.body.email)
        console.log(d);
    )

module.exports = router;

【参考方案1】：

在export.email，你有一个错字

exports.email = function(r) 
    get().collection("doctor").find("email":r)  // no ".dbo" after get()