express_graphql_persisted_queries_with_json_query_map.ts

1import express from 'express';
2import { graphqlHTTP } from 'express-graphql';
3import { buildSchema } from 'graphql';
4import { persistedQueries } from 'graphql-express-persisted-query';
5
6// 1. Define your GraphQL schema
7const schema = buildSchema(`
8  type Query {
9    hello: String
10  }
11`);
12
13// 2. Define your root resolver
14const rootValue = {
15  hello: () => 'Hello world!',
16};
17
18// 3. Define your persisted query map
19// In a real app, this would likely be imported from a generated JSON file
20const queryMap = {
21  "1": "{ hello }",
22};
23
24const app = express();
25
26// 4. Apply the persistedQueries middleware before express-graphql
27app.use(
28  '/graphql',
29  persistedQueries(queryMap),
30  graphqlHTTP({
31    schema: schema,
32    rootValue: rootValue,
33    graphiql: true,
34  })
35);
36
37app.listen(4000, () => {
38  console.log('Running a GraphQL API server at http://localhost:4000/graphql');
39});