一尘不染

TypeError:db.collection不是函数

node.js

我正在尝试将数据发布到在mLab上创建的数据库中,但出现此错误,但我不知道出了什么问题。我也阅读了有关此主题的先前询问的问题,但由于无法解决错误我是新来的。因此,我在这里发布了我要实现的代码,该代码取自本教程https://medium.freecodecamp.com/building-
a-simple-node-js-api-in-under-30-minutes-
a07ea9e390d2。

server.js

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const bodyParser = require('body-parser');

const db = require('./config/db');


const app = express();

const port = 8000;

app.use(bodyParser.urlencoded({extened:true}));


MongoClient.connect(db.url,(err,database) =>{

    if (err) return console.log(err)
    require('./app/routes')(app,{});
    app.listen(port,() => {
        console.log("We are live on"+port); 
    });

})

db.js

module.exports = {
  url : "mongodb://JayTanna:Jay12345@ds147510.mlab.com:47510/testing"
};

index.js

const noteroutes = require('./note_routes');

module.exports = function(app,db)
{
    noteroutes(app,db);

};

note_routes.js

module.exports = function(app, db) {
  app.post('/notes', (req, res) => {
    const note = { text: req.body.body, title: req.body.title };
    db.collection('notes').insert(note, (err, result) => {
      if (err) { 
        res.send({ 'error': 'An error has occurred' }); 
      } else {
        res.send(result.ops[0]);
      }
    });
  });
};

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2020-07-07

共1个答案

一尘不染

在server.js中,您传递了一个空对象,您需要在其中传递数据库作为第二个参数,这是您的route / index.js导出函数所期望的。

PFB更新了server.js:

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const bodyParser = require('body-parser');

const db = require('./config/db');

const app = express();

const port = 8000;

app.use(bodyParser.urlencoded({extended:true}));

MongoClient.connect(db.url,(err,database) =>{

    if (err) return console.log(err)
    //require('./app/routes')(app,{});
    //check below line changed
     require('./app/routes')(app, database);
    app.listen(port,() => {
        console.log("We are live on"+port); 
    });

});
2020-07-07