graphqlError.toJSON is not a function - need to upgrade graphql package

[cemsusal]

Describe the Bug
I am using Apollo Server with expressMiddleware in combined with Type GraphQL. Following issue is happening in my environment.

I have tried following versions of graphql npm package resulting the same behavior:

• 15.8.0
• 15.7.0
• 15.7.2

Seems like a bug in graphql package and resolved in later versions.
TypeGraphQL is not allowing me to use this version of graphql package: 16.6.0

To Reproduce
Any query with Apollo Server 4 returns following error message:

TypeError: graphqlError.toJSON is not a function at enrichError (file:///C:/Sources/seat-graph/node_modules/@apollo/server/src/errorNormalize.ts:84:30) at file:///C:/Sources/seat-graph/node_modules/@apollo/server/src/errorNormalize.ts:46:18 at Array.map (<anonymous>) at normalizeAndFormatErrors (file:///C:/Sources/seat-graph/node_modules/@apollo/server/src/errorNormalize.ts:39:29) at ApolloServer.errorResponse (file:///C:/Sources/seat-graph/node_modules/@apollo/server/src/ApolloServer.ts:1067:49) at ApolloServer.executeHTTPGraphQLRequest (file:///C:/Sources/seat-graph/node_modules/@apollo/server/src/ApolloServer.ts:1059:19) Unexpected error processing request: TypeError: graphqlError.toJSON is not a function

Expected Behavior
Queries should return the json data from resolvers.

Environment (please complete the following information):

• OS: Windows 11
• Node: v18.12.1
• Package version: 1.1.1
• TypeScript version: 4.9.3

[MichalLytek]

Apollo Server V4.0 has "Dropped support for versions of the graphql library prior to v16.6.0".
You need to use previous version or install type-graphql@2.0.0-beta.1.

[cemsusal]

Thanks, @MichalLytek for the explanation.

I resolved my issue by upgrading type-graphql package to ^2.0.0-beta.1. Both Apollo Server and Type GraphQL are working fine now with higher versions of graphql package.