graphql-add-middleware
GraphQL middleware for schema resolvers
Last updated a year ago by alekbe .
MIT · Repository · Bugs · Original npm · Tarball · package.json
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graphql-add-middleware Build Status

Easily add middleware to GraphQL schema resolvers

Installation

$ npm install --save graphql-add-middleware

Features

  • Add middleware to all schema resolvers
  • Add middleware to resolvers of given type
  • Add middleware to resolver of given field of given type

Usage

type User {
  name: String!
}

type Post {
  title: String!
  author: User
}

type Query {
  posts: [Post!]!
  user: User
}

type Mutation {
  createUser: User!
}

schema {
  query: Query
  mutation: Mutation
}
import { addMiddleware } from 'graphql-add-middleware';

// add middleware to ALL resolvers (also to nested resolver if they are defined in schema like Post.author)
addMiddleware(schema, async function (root, args, context, info, next) {
  // you can modify root, args, context, info
  const result = await next();
  // you can modify result
  return result; // you must return value
});

// add middleware only to given type
addMiddleware(schema, 'Query', async function (root, args, context, info, next) { ... }); // will add middleware to Query.posts and Query.user
addMiddleware(schema, 'Mutation', async function (root, args, context, info, next) { ... }); // will add middleware to Mutation.createUser
addMiddleware(schema, 'Post', async function (root, args, context, info, next) { ... }); // will add middleware to Post.author (Post.*)

// add middleware only to given type/field
addMiddleware(schema, 'Query.posts', async function (root, args, context, info, next) { ... }); // will add middleware to Query.posts
addMiddleware(schema, 'Post.author', async function (root, args, context, info, next) { ... }); // will add middleware to Post.author

License

License

Current Tags

  • 0.3.7                                ...           latest (a year ago)

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