Craft GraphQL APIs in Elixir with Absinthe

Chapter 7Resolution Middleware

Absinthe is built to be highly flexible. Even months prior to our first-class support for subscriptions, for example, people had put together their own implementations based on the tooling and support for extensions built into the framework. In this chapter, we’re going to look at one of the most important of these mechanisms: middleware.

Even within the small API we’ve written over the last few chapters, we’ve seen some common patterns emerge within some of our resolvers. As you look forward toward error handling, authorization, and other concerns a real API would have, you’ll want to become familiar with some tools that Absinthe provides for encapsulating these ideas into easier-to-use patterns.

We’re ...