UnlyEd/ra-data-graphql-prisma

import { IntrospectionListTypeRef, IntrospectionNamedTypeRef, IntrospectionNonNullTypeRef, IntrospectionTypeRef, TypeKind } from 'graphql';

/**
 * Ensure we get the real type even if the root type is NON_NULL or LIST
 * @param {GraphQLType} type
 */
const getFinalType = (
  type: IntrospectionTypeRef,
): IntrospectionNamedTypeRef => {
  if (type.kind === TypeKind.NON_NULL || type.kind === TypeKind.LIST) {
    return getFinalType(
      (type as IntrospectionListTypeRef | IntrospectionNonNullTypeRef).ofType!,
    );
  }

  return type as IntrospectionNamedTypeRef;
};

export default getFinalType;