GraphQL-Ruby Defer Example

This app demonstrates how to use @defer with Rails, GraphQL-Ruby, Apollo Client and React.

The app is a deck builder for Magic the Gathering:

• Decks are persisted in the app's local database (::Deck and ::Slot)
• Cards are fetched from Scryfall's REST API (::Scryfall::Card)

@defer is used to reduce time-to-first-byte: local data is returned immediately, but external calls are deferred.

Development

• Clone the repo
• bundle install
• bundle exec db:create db:migrate
• Install & compile the local apollo-client fork (https://github.com/rmosolgo/apollo-client/):
  • cd app/javascript/apollo-client
  • npm install
• yarn install
• bundle exec rails server