Apollo-server: Not able to access response object from context in apollo-server-fastify

Created on 14 Aug 2019 · 9Comments · Source: apollographql/apollo-server

Previously I was using apollo-server-express and I wanted to migrate to fastify so I change it to apollo-server-fastify. But it started giving lots of issues.

One of such issue is - Not able to access res object from context function.
Below code was working perfectly but res object itself was not available with apollo-server-fastify

context: async ({ req, res, connection }) => {
// res <--------- undefined
    if (connection) {
      return {
        models,
      }
    }
    if (req) {
      const me = await getMe(req, res)
      return {
        models,
        me,
        secret: process.env.SECRET,
      }
    }
  },

🖇️ fastify

Source

techyrajeev

👍2

Most helpful comment

Yeah, the same issue but you can pass reply instance manually.

File plugins/fastify-apollo-server/index.js

const fp = require('fastify-plugin');
const {ApolloServer} = require('apollo-server-fastify');

// **** Plugin: plugins/fastify-apollo-server/index.js
module.exports = fp(async ( fastify, opts, next ) => {
  const server = new ApolloServer({
    /* ... */
    context: async request => {
      const {reply} = request;
      return {
        request,
        reply, // res: reply,
        app: fastify,
      };
    },
  });

  fastify.addHook('preHandler', async ( request, reply ) => {
    if ( String(request.req.url).startsWith('/graphql') ) {
      request.reply = reply;
    }
  });

  fastify.register(server.createHandler());

  next();
}, {
  name: 'fastify-apollo-server',
});

File: init-server.js

const app = require('fastify')();

// Plugins
app.register(require('plugins/fastify-apollo-server'));

(async function () {
  await app.listen(3000);
})();

blacksmoke26 on 14 Aug 2019

👍4

All 9 comments

Yeah, the same issue but you can pass reply instance manually.

File plugins/fastify-apollo-server/index.js

const fp = require('fastify-plugin');
const {ApolloServer} = require('apollo-server-fastify');

// **** Plugin: plugins/fastify-apollo-server/index.js
module.exports = fp(async ( fastify, opts, next ) => {
  const server = new ApolloServer({
    /* ... */
    context: async request => {
      const {reply} = request;
      return {
        request,
        reply, // res: reply,
        app: fastify,
      };
    },
  });

  fastify.addHook('preHandler', async ( request, reply ) => {
    if ( String(request.req.url).startsWith('/graphql') ) {
      request.reply = reply;
    }
  });

  fastify.register(server.createHandler());

  next();
}, {
  name: 'fastify-apollo-server',
});

File: init-server.js

const app = require('fastify')();

// Plugins
app.register(require('plugins/fastify-apollo-server'));

(async function () {
  await app.listen(3000);
})();

blacksmoke26 on 14 Aug 2019

👍4

@blacksmoke26 seems like kind of hack, but thats simplest solution as well.

techyrajeev on 16 Aug 2019

Seems at least somewhat related to https://github.com/apollographql/apollo-server/issues/2476.

abernix on 26 Aug 2019

@abernix unfortunately, they're unrelated. If you look at the context param then it's documented that fastify receives nothing in the context... (which is inaccurate, it actually receives the req as context.

The linked issue is about express and what its context consists of.

devin-fee-ah on 2 Mar 2020

I've been having the same issue and was able to track down the cause. Should have a bug-fix PR up shortly, I'll be sure to link this issue. Meanwhile, if you'd like to check out the fix here it is -> https://github.com/autotelic/apollo-server/pull/1