![]() Make sure to add the following to your Gemfile gem 'bcrypt', '~> 3.1.7' The -database=postgresql flag will make our database.yml and gemfile setup for postgres and the -api flag will build a minimal build for building api so we don’t have all the bulk neccessary for rendering views. So this will create a new project in a notesapi folder. Starting Up Our Project rails new notesapi -database=postgresql -api If this is not the case just do this basic hello world tutorial to get a basic introduction before this tutorial. I’m assuming some basic knowledge of Ruby on Rails and that you have it installed. Our goal is to make an API where users can login and creates notes under their account. ![]() Also, check out RapidAPI’s documentation on publishing APIs so you get a better understanding of all the options.Certain parts of this tutorial were adapted from this tutorial, Our Mission We recommend you read up on how to set up a database on Heroku so you can add that capability to your APIs. You also learned how to deploy it to Heroku and publish it on RapidAPI. ![]() In this article, you learned how to create an API using Ruby on Rails. After a few seconds, you should get a response back. Now go ahead and click the “Save & Test Endpoint” button. Here you can just specify a name (“Payload” will suffice in this case), and a sample body. Further down, next to “Payload”, click on “Add Model”. Here, define a name for the endpoint (something like “Say”, for instance), then set the method to POST and the path to /say. Over at the top again, click on “Endpoints”, then click on “+ Create Endpoint”. These are headers that are sent by RapidAPI to our API, so it knows how to read the parameters clients send to it. Now add another header, but this time set the name to Accept and the value to application/json as well. For the name, set it to Content-Type and for the value, set it to application/json. Down below, click “+ Add Secret Header or Parameter”. ![]() Next, we’ll need to configure some Transformations. Click on “Settings” at the top, then set the “Base URL” to your Heroku app root endpoint (the one you got just before). Enter a name and a description for your API, and select a category. Head on to RapidAPI and click on “ Add your API” on the top right. Now that your API is online, we can add it to RapidAPI. Your API is now on Heroku! You can try the same curl commands we tried before, just replace the URL of your Heroku app. Now we need to create our controller and method: # app/controllers/cow_controller.rb What this is saying is, take a POST to /say and route it to the method say in CowController. Let’s add this endpoint to our routes file: # config/routes.rb Clients will POST to this endpoint with a set of parameters, and get a response back from us. Adding the Controller and Routeįor now, our API will only have one endpoint: /say. Make sure you run bundle install to get the gems. The jbuilder gem simplifies serving JSON in our API, by allowing us to build payloads using plain ruby. It’s a ruby implementation of the famous program. The first gem is what will allow us to serve Cowsay to our API clients. rails new cow_say -api -skip-active-recordĪfter this command is done, we’ll need to add two more gems to our Gemfile: In our case, we’ll generate a new API project, and also skip ActiveRecord, since we won’t be needing to store anything in a database. This can be further customized depending on your needs. Fortunately, Rails’ application generator offers an option to create a more “lean” version of a Rails app, where only the necessary modules for an API are installed. We won’t be rendering HTML views, for example. Since we’re going to be building an API, we don’t exactly need everything Rails offers. I personally prefer Visual Studio Code, but feel free to use the editor you’re most comfortable with. Other than that, you’ll need your favorite code editor. Installing Rails is also pretty simple: you can use their official installation guide. To install Ruby, refer to the official website for instructions. Both are relatively easy to install, but the procedure depends on the platform you’re on. What we will needįor this tutorial, you will need Ruby (preferably 2.6) and Ruby on Rails. We’ll later deploy this API to Heroku and publish it to RapidAPI so it’s easier for other developers to find it. Users of the API will be able to send a text and customize it using different parameters accepted by the Cowsay program. In this article, we’ll be building an API as an interface to Cowsay. If you’re planning on building an app, adding an API should definitely be in your roadmap. There are different types of APIs, but most boil down to RESTful, JSON APIs. Shorthand for Application Programming Interface, it provides developers programmatic access to the service. Every major online service nowadays offers an API.
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