linecode/tql

A GraphQL query builder for TypeScript. Avoid the pain of codegen.

TQL

🚧 We are getting close to 1.0 but this is still pre-production software at this point, see the current limitations.

tql is a TypeScript GraphQL query builder.

• 🔒 Fully Type-safe - Operation results and variables are fully type-safe thanks to TypeScript's advanced type-system.
• 🔌 Backendless: - Integrate with any GraphQL client to execute queries.
• 🔮 Automatic Variables: - Variable definitions are automatically derived based on usage.
• 📝 Inline Documentation: JSDoc comments provide descriptions and deprecation warnings for fields directly in your editor.
• ⚡ Single Dependency: graphql-js is our single runtime (peer) dependency.

Try it Out

Try out our pre-compiled Star Wars GraphQL SDK on CodeSandbox!

Installation

1. npm install @timkendall/tql@beta

   • TypeScript 4.1+ is required for Recursive Conditional Type support

2. Generate an SDK with npx @timkendall/tql-gen <schema> > sdk.ts

Usage

Import selector functions to start defining queries 🎉

import { useQuery } from '@apollo/client'

// SDK generated in previous setup
import { character, query, $ } from './starwars'

// define reusable selections
const CHARECTER = character(t => [
  t.id(),
  t.name(),
  t.appearsIn(),
])

const QUERY = query((t) => [
  t.reviews({ episode: Episode.EMPIRE }, (t) => [
    t.stars(),
    t.commentary(),
  ]),

  t.human({ id: $('id') }, (t) => [
    t.__typename(),
    t.id(),
    t.name(),
    t.appearsIn(),
    t.homePlanet(),

    // deprecated field should be properly picked-up by your editor
    t.mass(),

    t.friends((t) => <const>[
      t.__typename(),
      
      ...CHARECTER,
      // or
      CHARECTER.toInlineFragment(),

      t.on("Human", (t) => [t.homePlanet()]),
      t.on("Droid", (t) => [t.primaryFunction()]),
    ]),

    t.starships((t) => [t.id(), t.name()]),
  ]),
]).toQuery({ name: 'Example' })

// type-safe result and variables 👍
const { data } = useQuery(QUERY, { variables: { id: '1011' }})

Inspiration

I was inspired by the features and DSL's of graphql-nexus, graphql_ppx, gqless, and caliban.

License

MIT