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April 15, 2022 06:42 am GMT

Setup MongoDB in Node.js with Mongoose

Setting up database connection

npm install mongoose --save

First let import the dependency;

const mongoose = require("mongoose");

Then lets store the path of the database in a variable. The path should look like the following, with and being replaced with a user you have created for the database.

const dbPath = "mongodb://<dbuser>:<dbpassword>@ds250607.mlab.com:38485/test-db";

connect to the database.

mongoose.connect(dbPath, {    useNewUrlParser: true,});

module.exports = mongoose;

Once the application is started, it would be better if there was an indicator showing whether the application successfully connected to the database or not. So lets add some more code to fix that.

const db = mongoose.connection;db.on("error", () => {    console.log("> error occurred from the database");});db.once("open", () => {    console.log("> successfully opened the database");});

In the end the database.js should look like this.

// database.jsconst mongoose = require("mongoose");const dbPath = "mongodb://<dbuser>:<dbpassword>@ds250607.mlab.com:38485/test-db";mongoose.connect(dbPath, {    useNewUrlParser: true,});const db = mongoose.connection;db.on("error", () => {    console.log("> error occurred from the database");});db.once("open", () => {    console.log("> successfully opened the database");});module.exports = mongoose;

Setting up models/schema

// models/userModel.jsconst mongoose = require("../database");const schema = {    name: { type: mongoose.SchemaTypes.String, required: true },    email: { type: mongoose.SchemaTypes.String, required: true },    password: {         type: mongoose.SchemaTypes.String,         required: true,         select: false    }};const collectionName = "user"; // Name of the collection of documentsconst userSchema = mongoose.Schema(schema);const User = mongoose.model(collectionName, userSchema);module.exports = User;

// Create userUser.create({    name: name,    email: email,    password: password});// Find user by emailUser.findOne({    email: email});// Find user by email with the password field includedUser.findOne({    email: email}).select("+password");

Original Link: https://dev.to/sujon554/setup-mongodb-in-nodejs-with-mongoose-4229

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