loopback-graphql/src/boot.ts

Add Apollo Server or GraphQL queries on your Loopback server

import { graphqlExpress, graphiqlExpress } from 'graphql-server-express';
import { makeExecutableSchema } from 'graphql-tools';
import * as bodyParser from 'body-parser';

import { abstractTypes } from './ast';
import { resolvers } from './resolvers';
import { generateTypeDefs } from './typedefs';

export function boot(app, options) {
  const models = app.models();
  let types = abstractTypes(models);
  let schema = makeExecutableSchema({
    typeDefs: generateTypeDefs(types),
    resolvers: resolvers(models),
    resolverValidationOptions: {
      requireResolversForAllFields: false,
    },
  });

  let graphiqlPath = options.graphiqlPath || '/graphiql';
  let path = options.path || '/graphql';

  app.use(path, bodyParser.json(), graphqlExpress(req => {
    return {
      schema,
      context: req,
    };
  }));
  app.use(graphiqlPath, graphiqlExpress({
    endpointURL: path,
  }));
}