How to create a new Rails API application with a PostgreSQL database

Rails is a popular web application framework written in the Ruby programming language. It is known for its convention over configuration approach, which allows developers to quickly and easily create web applications with minimal setup. One of the most powerful features of Rails is its ability to easily connect to a variety of databases. In this article, we will discuss how to create a new Rails API application with a PostgreSQL database.

To create a new Rails API application with a PostgreSQL database, we will use the rails new command with the --api and --database=postgresql flags. The rails new command is used to create a new Rails application with the specified project name. The --api flag is used to generate a new Rails API application, which is a version of Rails optimized for building API’s. The --database=postgresql flag is used to specify that the new application should be configured to use a PostgreSQL database.

Here is an example of how to create a new Rails API application with a PostgreSQL database:

rails new project-name-here --api --database=postgresql

In this example, project-name-here is the name of the new application that you want to create.

When you run this command, Rails will create a new directory with the specified project name, and it will generate all the necessary files and directories for a new Rails application. The --api flag will also remove middleware and generators that are not necessary for API-only applications, making your API faster and light-weight. The --database=postgresql flag will create the necessary configuration files and set the adapter to use the PostgreSQL adapter.

It is important to note that this command assumes that you have postgresql installed and configured on your machine, you also need to have the pg gem installed in your machine, if not you can install it by running gem install pg.

Once the new application has been created, you can navigate to the new application directory and start the server using the rails s command. If you want to check that your application is working properly, you can visit http://localhost:3000 in your web browser.

Conclusion:

In conclusion, creating a new Rails API application with a PostgreSQL database is a simple and straightforward process. The rails new command with the --api and --database=postgresql flags makes it easy to create a new Rails API application and configure it to use a PostgreSQL database. This allows developers to quickly and easily create web applications with minimal setup and a focus on building API.