Adonis Find by ID - JavaScript

AdonisJS is a Node.js web application framework which runs on all major operating systems. One of the many great features of AdonisJS is the ability to search for a specific item in a database based on its unique identifier. In this tutorial, we will learn how to use AdonisJS to find an item by its ID.

Prerequisites

Before we begin, make sure that you have the following:

• Node.js and NPM installed on your computer
• AdonisJS installed

Step 1: Setup

First, we need to create a new AdonisJS application. We can do this by running the following command in our terminal:

adonis new myapp

Next, we need to create a new database and connect to it. We can do this by editing the .env file in our AdonisJS project and setting the following variables:

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_USER=root
DB_PASSWORD=
DB_DATABASE=myapp

Make sure to replace myapp with the name of your own database.

Finally, let's create a new table users in our database by running the following migration command:

adonis migration:run

Step 2: Creating the Model

Now that our database is ready, let's create a new Model for our users table. We can do this by running the following command in our terminal:

adonis make:model User

Next, let's add the following code to our User Model:

'use strict'

/** @type {typeof import('@adonisjs/lucid/src/Lucid/Model')} */
const Model = use('Model')

class User extends Model {

}

module.exports = User

Step 3: Creating the Route

Now that we have our User Model, let's create a new AdonisJS Route to handle the request for finding a user by ID. We can do this by adding the following code to our start/routes.js file:

'use strict'

const Route = use('Route')

Route.get('/users/:id', async ({ params }) => {
  const { id } = params
  const user = await User.find(id)

  return user
})

Step 4: Testing

Now that our Route is setup, let's test it out. We can do this by running the following command in our terminal:

adonis serve --dev

Next, we can navigate to http://localhost:3333/users/1 in our web browser to test if our route is correctly handling the request.

Conclusion

Now you know how to use AdonisJS to find a specific item in a database based on its unique identifier! With this knowledge, you can take your web application to the next level and provide your users with a seamless experience.