graphql-tools merged Subscription schema

merged-schema.ts

import {
	makeExecutableSchema,
	mergeSchemas,
} from 'graphql-tools';
import { PubSub } from 'graphql-subscriptions';

const simpleSchema = makeExecutableSchema({
	typeDefs: `
	  type Query {
		_blank: String
	  }
	`,
	resolvers: {
		Query: {
			_blank: () => 'helloWorld',
		},
	},
});

const pubsub = new PubSub();

const subscriptionSchema = makeExecutableSchema({
	typeDefs: `
	type Query {
		_blank2: String
	}

	type TimeQuery {
		time: String
		throwError: Boolean
	}

	  type Subscription {
		tellMeTime: TimeQuery
	  }
	`,
	resolvers: {
		Subscription: {
			tellMeTime: {
				subscribe: () => pubsub.asyncIterator('time'),
			},
		},
		TimeQuery: {
			throwError: () => { throw new Error(); },
		},
	},
});

setInterval(() => {
	pubsub.publish('time', {
		tellMeTime: {
			time: new Date().toLocaleTimeString(),
		},
	});
}, 1000);

export const schema = mergeSchemas({
	schemas: [
		simpleSchema,
		subscriptionSchema,
	],
});