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is there a way to create a separate file for mongodb operation functions and use those functions in index file?

i have main code in index.js file with express server, and i want to create another file just to handle database CRUD operations. How can i do the following?

index.js
import functions from mongo.js

getUsers()


mongo.js

using MongoClient.connect to connect to db
function getUser()
// get users from mongo db



2 Answers
2

You can achieve this creating helper function:

I will explain on example from my project:

First you need to create your helper function file

helper.js

module.exports =
userAuthenticated: function(req, res, next)
if(req.isAuthenticated())
return next();

res.redirect('/login')

;


As you can see I exported this function.

Then we are able to reach the code from it like this in other .js files:

other.js

const userAuthenticated = require('../../helpers/authentication.js');

router.all('/*', userAuthenticated, (req, res, next)=>
req.app.locals.layout = 'admin';
next();
);


Do you use mongoose? I strictly recommend to use this lib instead of native connection driver.

You could achieve your goal by creating mongoose connection in a separate file, then import connection instance to the file with db schema. For example:

const mongoose = require("./mongo");
const Schema = mongoose.Schema;

const User = new Schema({
name: type: String ,
password: type: String )

const UserModel = mongoose.model("User",User);
module.exports =
model: UserModel,
getById: id => UserModel.find(_id:id)



And then just import those file in the place where you want to use it:

const UserModel = require("./User");
...
UserModel.getById("someid").then(handler);


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