serverless-appsync-simulator: Upgrading to 0.7.1 throws Error: GUID must provide "serialize" function

Describe the bug Upgrading to serverless-appsync-simulator version 0.7.1 has caused the following error to be thrown when running the local server:

Error: GUID must provide "serialize" function. If this custom Scalar is also used as an input type, ensure "parseValue" and "parseLiteral" functions are also provided.

To Reproduce Upgrade to 0.7.1. Use these dependencies as well

"serverless": "^1.60.0",
"serverless-appsync-plugin": "^1.1.2",
"serverless-appsync-simulator": "^0.7.1",
"serverless-offline": "^5.12.1",

And create a graphql schema making use of only ID, String, Int, Float types and types based off of enums. We’re also using various aws decorators like @aws_subscribe

Expected behavior The api should start successfully and not die on the error listed above

Screenshots Screenshot 2020-10-29 at 09 46 55

Additional context I apologize for not providing more info, but I’m not sure where exactly this error is coming from. I’m moreso sharing because I cannot find any information elsewhere, and am wondering if anyone else has the same issue

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 1
Comments: 19 (18 by maintainers)

Most upvoted comments

Great thanks @brno32

Closing this issue

bboure on Nov 2, 2020

I found it! It caused by graphql versions mismatch. I’ve had installed one dependency which used graphql version 0.13.2 and I can see that _scalarConfig is present in that old version: https://github.com/graphql/graphql-js/blob/5f50543f7608d52403b1440d1a617626f412a63f/src/type/definition.js#L454

So graphql-scalars was using that old version becuase in they have graphql^0.13.0 in their peerDependencies: https://github.com/Urigo/graphql-scalars/blob/master/package.json#L71

I will create an issue in graphql-scalars.

Thanks for help ❤️ and sorry for bothering you @bboure 🙈

FilipPyrek on Oct 31, 2020