CODEWITHSUNDEEP
node.jsexpressgraphqlapollo-server
balafi
balafi

Reputation: 2153

How to update session from within a graphql resolver using apollo-server-epxress

I have a graphql server based on apollo-server-express.

My resolvers typically do REST requests on a legacy API. One of the resolvers performs user authentication by sending the username and password to the backend server. The response includes a token that is used for the authentication of subsequent requests.

At the moment I pass the token to my client application includes it in the subsequent requests.

I would now like to save this token in the epxress-session so that it can be then be passed in the context of subsequent resolvers implicitly,

but I don't see how I can update request.session after a response is received in the resolver.

Upvotes: 2

Views: 2567

Answers (1)

Daniel Rearden
Daniel Rearden

Reputation: 84687

First, expose the session object to the resolvers by including it in your context. express-graphql includes the request object as your context by default, but I don't think Apollo server's middleware shares that behavior -- instead we need to explicitly define the context.

app.use('/graphql', bodyParser.json(), (req, res, next) => {
  const context = { session:req.session }
  graphqlExpress({ schema })(req, res, next)
})

Then, inside your resolver, just add the returned token to the session object:

const loginResolver = (obj, {username, password}, context) => {
  return apiAuthCall(username, password)
    .then(token => {
      context.session.token = token
      return // whatever other data, could just be a boolean indicated whether the login was successful
    })
}

Upvotes: 3

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