Resolvers Composition Transform

The resolversComposition transform allow you add middleware to your existing resolvers.

yarn add @graphql-mesh/transform-resolvers-composition

How to use?#

Add the following configuration to your Mesh config file:

transforms:
  - resolversComposition:
        - resolver: 'Query.me'
          composer: is-auth#isAuth
        - resolver: 'Mutation.*'
          composer: is-admin#isAdmin

module.exports = {
  isAuth: next => (root, args, context, info) => {
      // Check if Authorization header is present
      if(!context.headers.authorization) {
          throw new Error('Unauthorized');
      }
      return next(root, args, context, info);
  }
};

Config API Reference#

resolver (type: String, required) - The GraphQL Resolver path Example: Query.users
composer (type: Any, required) - Path to the composer function Example: ./src/auth.js#authComposer