Hey!

I've implemented and currently trialing this rubygem https://rubygems.org/gems/activeadmin-graphql in production, this gems provides basic integration with graphql-ruby gem and does all injections to produce useful schema. Resolves needs for codegen capabilites as schema comes out-of-box in secure and safe manner.

ActiveAdmin has very nice out-of-box REST API for each resource, although REST in core does not have any mention about strict schema or validations, which are fully solved in GraphQL as described standard. Although, definitely graphql is not the easiest concept with lot's of things to acknowledge and experience.

Possibly could be nice addition to have openapi.json out-of-box, but for me graphql solves this and much more other problems (and sure introduces even more).

Looking forward for feedback and any comments!