DEPRECATED

This project has been renamed to graphql-resolved.

Install using npm install graphql-resolved instead.

graphql-resolvers-chain

graphql-resolvers-chain is a framework/server agnostic resolvers creation tool for GraphQL

This project provide a middleware-like approach to GraphQL servers enabling the composition of resolvers chains through a simple and expressive API.

Installing

npm

npm i graphql-resolvers-chain --save

yarn

yarn add graphql-resolvers-chain

Usage

Create your first resolver using the chain, protect or apply api

chain api

Create a new resolver chaining the ones in the supplied array. The order matters from left to right. The last resolver being the one return the final expect value. chain([1, 2, 3, 4])

import { chain } from 'graphql-resolvers-chain';
import { isAuthenticated, isAdmin, isTopContributer } from './auth/resolvers';
import * as UserResolvers from './user/resolvers';
 
const getMe = chain([isAuthenticated, UserResolvers.getMe])
 
const Query = {
  getMe
}
 
const resolvers = {
  Query,
}

apply api

Applies all the resolvers to all of those in the to object.

• resolvers (The order matters from left to right)

const allUserResolvers = apply({ resolvers: [isAuthenticated], to: UserResolvers })
const Query = {
  ...allUserResolvers
}

protect api

The protect key work take three arguments:

• it (Optional) a resolver function, if supplied protect returns a new resolver function
• all(Optional) an object with resolvers, if supplied protect returns an object with the exact same resolvers names as keys
• using a list of resolvers to apply(The order matters from left to right).

const getMe = protect({
  it: UserResolvers.getMe,
  using: [isAuthenticated]
});
 
const adminResolvers = protect({
  all: { PostResolvers.deletePost, PostResolvers.correctPost },
  using: [isAuthenticated, isAdmin]
});
 
const Query = {
  getMe
  ...adminResolvers
}