Craft GraphQL APIs in Elixir with Absinthe

Using Built-in Plugins

As we noted at the start, a plugin in Absinthe is any module that implements the Absinthe.Plugin behaviour. It is not uncommon for a plugin module to also implement the Absinthe.Middleware behaviour, because the two behaviours work together. The middleware callbacks handle changes that need to happen to each individual field, and the plugin callbacks operate at the document level.

We’ll start by looking at two simple plugins built into Absinthe itself. These will help us get the hang of how plugins work, and each has use cases where they’re the perfect tool for the job.

Async

A step in the direction of efficient execution would be to run each field concurrently. It doesn’t get rid of the N+1 query, but it does mean that ...