darrellwarde / graphql-sdl-validation-demo

GraphQL validation demo

Setup

npm i

Running

npm start

Background

This project demonstrates a few simple custom GraphQL SDL validation rules:

• DirectiveArgumentOfCorrectTypeRule - fetches the definition for the directive from the schema, and validates that the directive arguments are of the correct type.
• FooInterfaceFieldDefinitionDirectiveRule - a business logic rule that validates that the @foo directive is only used on interface field definitions.
• BarRequiresFooDirectiveRule - a business logic rule that validates that any applications of the @bar directive are accompanied by a @foo directive.