GraphQL is a query language for your API. In this episode, we will look at adding GraphQL to our Ruby on Rails application and seeing how we can pull down data and create records.

We look at consistency in a Rails API structure and handling errors.

Using the URI or Accept Headers, we can version our API to prevent breaking changes to our end users. In this episode, we look at versioning our RESTful API.

In this episode, we take a look at our GraphQL API that we created from Episode 119 and refactor the mutations and queries so that we keep the structure and API manageable.

In this episode, we look at creating an iOS Application which will communicate with the Rails API application from the previous episode.