TypeError: db.collection is not a function

express, mongodb, node.js, rest

Solution

In your server.js, you are passing empty object where you need to pass database as second argument as its what your routes/index.js export function expects.

PFB updated 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); 
    });

});

Problem

I am trying to post data to database that I have created on mLab and I am getting this error but I don't know whats going wrong.I also have read previously asked question on this topic but I am not able to solve my error as I am new to this. So here I am posting the code which I am trying to implement and It is taken from this tutorial 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]); } }); }); }; ```

Original source