apollo-resolvers

library1.4.2jsnpmunverified

A library for building expressive and composable GraphQL resolvers with a reactive middleware-like pattern. Version 1.4.2 (latest) — last published in 2018, no recent updates, low maintenance cadence. It wraps Apollo resolver chains with authorization checks, error handling, and context cleanup, reducing duplicate logic across resolvers. Ships TypeScript types. Unlike raw Apollo resolvers, it enforces a layered resolver composition pattern via createResolver, allowing parent-child resolver chains with error masking and access control.

testing

npm install apollo-resolvers

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · APOLLO-RESOLVERS

apollo-resolvers

testingjavascriptv1.4.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

createResolver

✓ import { createResolver } from 'apollo-resolvers'

✗ const createResolver = require('apollo-resolvers')

Library provides ESM imports via the main entry point. CJS require works but TypeScript may need esModuleInterop.

default

✓ import apolloResolvers from 'apollo-resolvers'

✗ const apolloResolvers = require('apollo-resolvers').default

Default export is available; use named exports for individual functions like createResolver.

type CreateResolverOptions

✓ import type { CreateResolverOptions } from 'apollo-resolvers'

✗ import { CreateResolverOptions } from 'apollo-resolvers'

Type imports require explicit 'type' keyword when using isolatedModules or similar TypeScript settings.

ResolverMiddleware

✓ import { ResolverMiddleware } from 'apollo-resolvers'

✗ import { ResolverMiddleware } from 'apollo-resolvers/types'

Types are exported from main entry; no separate types file needed.

Creates a base resolver with error masking and an authenticated child resolver using createResolver.

import { createResolver } from 'apollo-resolvers'; import { createError, isInstance } from 'apollo-errors'; const UnknownError = createError('UnknownError', { message: 'An unknown error has occurred!' }); export const baseResolver = createResolver( null, (root, args, context, error) => isInstance(error) ? error : new UnknownError() ); const AuthenticationRequiredError = createError('AuthenticationRequiredError', { message: 'You must be logged in' }); export const isAuthenticatedResolver = baseResolver.createResolver( (root, args, { user }) => { if (!user) throw new AuthenticationRequiredError(); } ); import { makeExecutableSchema } from 'graphql-tools'; import { typeDefs, resolvers } from './schema'; // Your schema definition const schema = makeExecutableSchema({ typeDefs, resolvers });

Debug

Known issues

deprecatedThis library has not been updated since 2018. It relies on apollo-errors and graphql-tools which are also in maintenance mode.

fix

Consider using modern Apollo Server (v4+) with built-in error masking and custom resolvers without this library.

affects: >=1.0.0

gotchaThe library assumes you are using apollo-errors for custom errors. Without it, error masking via createResolver's handler may not work correctly.

fix

Install apollo-errors as a peer dependency: npm install apollo-errors

affects: >=1.0.0

breakingIn version 1.0.0, the API changed from resolve() to createResolver(). Old code using resolve() will break.

fix

Replace resolve() with createResolver() and update resolver chaining syntax.

affects: <1.0.0

gotchaTypeScript types shipped with the package may be incomplete or outdated. Some generics might be missing.

fix

Set strict TypeScript checking or manually augment types as needed.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'apollo-resolvers'

Package not installed or missing from dependencies.

fix

Run npm install apollo-resolvers

TypeError: createResolver is not a function

Incorrect import (e.g., default import instead of named import).

fix

Use import { createResolver } from 'apollo-resolvers'

TypeError: Cannot read property 'createResolver' of undefined

Attempting chain on createResolver result but baseResolver is undefined.

fix

Ensure createResolver returns a resolver object. Verify that null is passed as first argument if no parent resolver.

Upgrade

Version history

1.4.2latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

38 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/thebigredgeek/apollo-resolvers ↗

packageapollo-resolvers ↗

homepagehttps://github.com/thebigredgeek/apollo-resolvers#readme ↗