Lambda GraphiQL errors when event.queryStringParameters is null

[thevtm]

I'm running a Lambda GraphQL Server using AWS Lambda and API Gateway.
The GraphiQL is configured as a Lambda Proxy integration.

Intended outcome
Get the regular GraphiQL interface when I access https://myapi.com/graphiql.

Actual outcome
Cannot read property 'query' of null

How to reproduce the issue

import { graphiqlLambda } from "apollo-server-lambda";

export default graphiqlLambda({
  endpointURL: "/beta",
});

GraphiQL method configured as a Lambda Proxy integration.

Workaround
https://myapi.com/graphiql?foo=42 works just fine.

[alanhoff]

I was able to reproduce it and the workaround worked.

[nenti]

Is there a workaround to fix this on the server rather than by sending the client a different url?

[harshabonthu]

If I downgrade graphql-server-lambda to 0.8.5, then it works and any version above that its broken.

[diit]

Ran into this as well, a good solution would be to change this:

https://github.com/apollographql/apollo-server/blob/master/packages/apollo-server-lambda/src/lambdaApollo.ts#L87

to:

const query = event.queryStringParameters || {};

[stubailo]

I think #512 fixes this issue!

[abernix]

Closing as I suspect this is fixed, but please do ping back or open a new issue if this is still occurring on the latest versions of Apollo Server 2.x!

Thanks for reporting this originally!