adonis-apollo

Apollo GraphQL server for AdonisJS 5.

[!WARNING] This module is unstable and in active development. Use at your own risk.

Installation

npm i adonis-apollo
node ace configure adonis-apollo

Then add the following to the "metaFiles" array in .adonisrc.json:

{
  "pattern": "app/Schemas/*",
  "reloadServer": true
}

Usage

Bind the apollo server to your AdonisJs application.
In start/routes.ts:

import ApolloServer from '@ioc:Zakodium/Apollo/Server';

ApolloServer.applyMiddleware();

// You can also call `applyMiddleware` inside a route group:
Route.group(() => {
  ApolloServer.applyMiddleware();
}).middleware('auth');

Schema

The GraphQL schema should be defined in .graphql files (by default located in app/Schemas). The schema folders are scanned recursively.

type Query {
  hello: String!
  rectangle: Rectangle!
}

type Rectangle {
  width: Int!
  height: Int!
  area: Int!
}

Resolvers

Resolvers should be exported from .ts files (by default located in app/Resolvers). Only the first level of resolver folders is scanned, so you can use sub-folders put additional code.

All resolvers are merged into a single object, so you can define them in multiple files.

There are two supported ways of defining resolvers:

Exporting classes

Multiple classes can be exported from a single file. The name of the exported binding will be used as the name of the GraphQL type.

export class Query {
  hello() {
    return 'world';
  }

  rectangle() {
    return { width: 10, height: 20 };
  }
}

export class Rectangle {
  area(rectangle) {
    return rectangle.width * rectangle.height;
  }
}

It is also possible to add the suffix Resolvers to the exported name to avoid potential conflicts:

interface Rectangle {
  width: number;
  height: number;
}

export class RectangleResolvers {
  area(rectangle: Rectangle) {
    return rectangle.width * rectangle.height;
  }
}

Exporting a single object

When a single object is exported as default, it is assumed to be a map of resolvers.

interface Rectangle {
  width: number;
  height: number;
}

export default {
  Query: {
    hello: () => 'world',
    rectangle() {
      return { width: 10, height: 20 };
    },
  },
  Rectangle: {
    area: (rectangle: Rectangle) => rectangle.width * rectangle.height,
  },
};

Troubleshooting

Error: Query root type must be provided

Apollo requires a query root type to be defined in your schema. To fix this error, create a file app/Schemas/SomeSchema.graphql with at least a Query type.

For example:

type Query {
  hello: String!
}

BadRequestError: This operation has been blocked as a potential Cross-Site Request Forgery (CSRF)

This error may happen if you try to access the GraphQL endpoint from a browser. Make sure forceContentNegotiationTo is not unconditionally set to 'application/json' in config/app.ts. You can either disable this option or set it to a function that ignores the GraphQL route.

Configuration

Landing page

To configure the default landing page, you can pass apolloProductionLandingPageOptions or apolloLocalLandingPageOptions to the config. Another possibility is to override the plugins config in config/apollo.ts.

The default configuration is:

import {
  ApolloServerPluginLandingPageLocalDefault,
  ApolloServerPluginLandingPageProductionDefault,
} from '@apollo/server/plugin/landingPage/default';

const plugins = [
  Env.get('NODE_ENV') === 'production'
    ? ApolloServerPluginLandingPageProductionDefault({
        footer: false,
        ...apolloProductionLandingPageOptions,
      })
    : ApolloServerPluginLandingPageLocalDefault({
        footer: false,
        ...apolloLocalLandingPageOptions,
      }),
];

See the Apollo Graphql documentation to learn how to customize or disable the landing page.

Scalars

All the resolvers from graphql-scalars are installed automatically.

To enable any of the scalar types documented in graphql-scalars, for example DateTime, just add a scalar line to your schema:

scalar DateTime

Uploads

To enable support for inline multipart/form-data uploads using graphql-upload:

• Set enableUploads: true in config/apollo.ts.
• Update the config of the body parser in config/bodyparser.ts by adding your GraphQL route (by default: /graphql) to the multipart.processManually array.
• Add the Upload scalar to your schema: scalar Upload.
• Make sure your GraphQL upload client sends the 'Apollo-Require-Preflight' header, otherwise Apollo will reject multipart requests to prevent CSRF attacks.

License

MIT