Migration from Express GraphQL
Installation
You can start by installing graphql-yoga package.
Replace 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 { createServer } = require('@graphql-yoga/node')
const { schema } = require('./schema')
const app = express()
- app.use('/graphql', graphqlHTTP(req => ({
- schema: schema,
- context: {
- token: req.headers.authorization
- },
- graphiql: true
- })))
+ const yoga = createServer({
+ 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, context and other parameters can be passed dynamically per HTTP
request. context parameter of GraphQL Yoga can be a factory function but
schema cannot. So you should use
@envelop/use-lazy-loaded-schema
for the same behavior.