Migration from Express GraphQL
Installation
You can start with installing graphql-yoga package.
npm i graphql-yogaReplace Express GraphQL’s middleware
You should replace Express GraphQL’s middleware with GraphQL Yoga’s;
const express = require('express');
- const { graphqlHTTP } = require('express-graphql');
+ const { createYoga } = require('graphql-yoga');
const { schema } = require('./schema');
const app = express();
-app.use('/graphql', graphqlHTTP(req => ({
- schema: schema,
- context: {
- token: req.headers.authorization
- },
- graphiql: true,
-})));
+const yoga = createYoga({
+ schema,
+ context: (req) => ({ // Context factory gets called for every request
+ myToken: req.headers.get('authorization'),
+ }),
+ graphiql: true,
+})
+
+app.use('/graphql', yoga);
app.listen(4000);
console.log('Running a GraphQL API server at http://localhost:4000/graphql');
schema,contextand other parameters can be passed dynamically per HTTP request.contextparameter of GraphQL Yoga can be a factory function butschemacannot. So you should use @envelop/use-lazy-loaded-schema for the same behavior.