Showing 'db.get is not a function' NodeJs, MongoDB

Question

Making a voting app that consists of following 2 models users and polls and database consisting of two collections users and polls.

User.js

'use strict';

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var User = new Schema({
    github: {
        id: String,
        displayName: String,
        username: String,
        publicRepos: Number
    },
    nbrClicks: {
        clicks: Number
    }
});
module.exports = mongoose.model('User', User);

Poll.js

'use strict';

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var Poll = new mongoose.Schema({
    title: { type: String, required: true },
    creator: String,
    choices: [String],
    votes: [Number]
});
module.exports = mongoose.model('Poll', Poll);

and this is the route part

'use strict';
require('dotenv').load();
var path = process.cwd();
var ClickHandler = require(path + '/app/controllers/clickHandler.server.js');
var mongo = require('mongodb');
var mongoose = require('mongoose');
var db = mongoose.createConnection(process.env.MONGO_URI);

module.exports = function (app, passport) {
    function isLoggedIn (req, res, next) {
        if (req.isAuthenticated()) {
            return next();
        } else {
            res.redirect('/login');
        }
    }

    var clickHandler = new ClickHandler();
    app.route('/').get(isLoggedIn, function (req, res) {
        //console.log(display-name.profile-value);
        res.render(path + '/public/index.jade');
    });
    app.route('/polls').get(function(req, res) { 
        var polls = db.get('polls');
        console.log(polls);
        res.render(path + '/public/polls.jade');
    })

This is the error being thrown

TypeError: db.get is not a function
at /home/ubuntu/workspace/app/routes/index.js:39:22
at Layer.handle [as handle_request] (/home/ubuntu/workspace/node_modules/express/lib/router/layer.js:95:5)
at next (/home/ubuntu/workspace/node_modules/express/lib/router/route.js:131:13)
at Route.dispatch (/home/ubuntu/workspace/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/home/ubuntu/workspace/node_modules/express/lib/router/layer.js:95:5)
at /home/ubuntu/workspace/node_modules/express/lib/router/index.js:277:22
at Function.process_params (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:330:12)
at next (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:271:10)
at SessionStrategy.strategy.pass (/home/ubuntu/workspace/node_modules/passport/lib/middleware/authenticate.js:325:9)
at SessionStrategy.authenticate (/home/ubuntu/workspace/node_modules/passport/lib/strategies/session.js:71:10)
at attempt (/home/ubuntu/workspace/node_modules/passport/lib/middleware/authenticate.js:348:16)
at authenticate (/home/ubuntu/workspace/node_modules/passport/lib/middleware/authenticate.js:349:7)
at Layer.handle [as handle_request] (/home/ubuntu/workspace/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:312:13)
at /home/ubuntu/workspace/node_modules/express/lib/router/index.js:280:7
at Function.process_params (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:330:12)
at next (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:271:10)
at initialize (/home/ubuntu/workspace/node_modules/passport/lib/middleware/initialize.js:53:5)
at Layer.handle [as handle_request] (/home/ubuntu/workspace/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:312:13)
at /home/ubuntu/workspace/node_modules/express/lib/router/index.js:280:7
at Function.process_params (/home/ubuntu/workspace/node_modules/express/lib/router/index.js:330:12)

I'm gonna guess the problem is that db.get isn't a function. You're going to want to do something with Poll.find the mongoose docs — numbers1311407
– numbers1311407, Commented Aug 1, 2016 at 14:18

Community · Accepted Answer · 2017-05-23 10:29:46Z

2

First you need to import Poll into your route file.

var Poll = require('./PATH_TO_POLL/Poll');

Then as @numbers1311407 has described, if you want to return all the saved Poll documents try:

Poll.find(function (err, polls) {
  if (err) return console.error(err);
  console.log(polls);
})

edit:

More information on module.exports can be found here

edited May 23, 2017 at 10:29

CommunityBot

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answered Aug 1, 2016 at 14:47

alex

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2 Comments

Diwakar Moturu Over a year ago

but, actually I have exported the Poll model using module.exports, so cant it be called simply without using require method elsewhere in the directory..?

alex Over a year ago

Your welcome, happy to help. You have to require 'Poll', what you call it here module.exports = mongoose.model('Poll', Poll); indicates by convention you should call it with the same name, but you could call it anything. Stick to the naming convention though, it makes your code easier to read.

nazimameer · Accepted Answer · 2022-11-06 09:31:17Z

-1

this error is comes when using mongodb community server. so you need to use mongoose or another one.

answered Nov 6, 2022 at 9:31

nazimameer

11 bronze badge

1 Comment

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

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