Create Rails Application<\/h2>\n
To begin with, let\u2019s create a Rails app by using the below command<\/p>\n
$ rails new jwt_demo --api<\/pre>\nAdd Gems<\/h2>\n
Now add gems to your project. Here we will need two gems:<\/p>\n
- \n
- JWT
\n \u2022 Open industry standard (RFC 7519)
\n \u2022 Used to represent claims securely between two parties<\/li>\n - bcrypt
\n \u2022 An algorithm used for password hashing<\/li>\n<\/ul>\n# Use JWT gem for token-based authentication\r\ngem 'jwt'\r\n# Use ActiveModel has_secure_password\r\ngem 'bcrypt', '~> 3.1.7'<\/pre>\n
Now, install all dependencies by running bundle install.<\/p>\n
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\nBacancy is a one-stop solution for custom app development. Contact us today and hire Ruby on Rails developer<\/a> from us for your dream project.<\/i><\/strong><\/p>\nCreate User Model<\/h2>\n
The next step in our tutorial is to create a user model. For that use the below command.<\/p>\n
rails g model user name:string user_name:string email:string Password_digest:string<\/pre>\n
Run migration using rails db:migrate<\/strong><\/p>\n
Add the below code to your User Model.<\/p>\n
![\"Create](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Create-User-Model-min.png\")
Create User Model<\/p><\/div>\n
Create User Controller<\/h2>\n
Now, moving on to creating a controller with the below command.<\/p>\n
rails g controller users<\/pre>\n
Add CRUD Operations<\/h2>\n
We will be implementing CRUD operations in our application. So, for that refer to the below code.<\/p>\n
![\"Add](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Add-CRUD-Operations-min.png\")
<\/p>\nCreate JwtToken Concern<\/h2>\n
Now, in this section, we will implement JWT. As shown below we will use these two functions for creating Rails API Authentication using JWT<\/i>.<\/p>\n
![\"Create](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Create-JwtToken-Concern-min.png\")
<\/p>\nAdd the authenticate_user<\/mark> method inside your application_controller<\/mark><\/p>\n
![\"application_controller\"](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/application_controller-min.png\")
<\/p>\nCreating Authentication Controller<\/h2>\n
Use the below command to create an authentication controller.<\/p>\n
rails g controller authentication<\/pre>\n
Implementing the Login Function<\/h2>\n
Now, we will implement the login function in authentication_controller as shown in the below code.<\/p>\n
![\"Implementing](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Implementing-the-Login-Function-min.png\")
<\/p>\nUpdate routes.rb<\/h2>\n
Use the code to update the route.<\/p>\n
![\"Update](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Update-routes.rb-min.png\")
Update routes.rb<\/p><\/div>\n
Test the API using Postman<\/h2>\n
So, we are done with building our demo application. It\u2019s time to test now!<\/p>\n
Create Users<\/h3>\n
![\"Create](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Create-Users-min.png\")
<\/p>\nLogin<\/h3>\n
![\"Login\"](\"https:\/\/www.bacancytechnology.com\/blog\/wp-content\/uploads\/2022\/09\/Login-min.png\")
<\/p>\nConclusion<\/h2>\n