How can i pass express Request and Response objects into graphql-yoga context using the createYoga function? - express

Question

I want to pass the express req and res object to my context because i want to use express-sessions to do session-based-auth because the default requests from the context does not know about sessions. Here is what I have tried
app.use("/graphql", (req, res) => {
return createYoga({
context: ({ params }) => {
return {
req,
params,
res,
prisma,
redis: redisClient,
};
},
graphiql: true,
landingPage: false,
cors: false,
schema,
});
});
But if i try this it seems like the request is not going through.

Answer 1

According to the docs, while running in node.js and express runtime, the context will automatically have the request and response.
Server Context
When creating the server instance, GraphQL Yoga accepts an additional
object from your base server framework or library that will be merged
with the default context. Node.js (standalone, express and Next.js
etc.)
If you are using GraphQL Yoga as a standalone server with createServer
from the http(s) module or exposing it as a middleware as we show in
the express or Next.js integration recipes.
req - Node.js IncomingMessage object
res - Node.js ServerResponse object
The req and res objects are added to the initial context object.
const serverContext = { ...defaultContext, req, res }
Thus, when using #graphql-yoga/node, it is possible to access
context.req and context.res within the GraphQL resolvers or the user
context factory function.
However, we recommend avoiding using context.req and context.res
wherever possible and instead favor context.request, as it is more
future-proof and platform independent (as Node.js HTTP servers adopt
the Fetch Response API).
I did try this out and the context does have the req and res objects.