Issue with graphql-jit

[numToStr]

Describe the bug
So, I am using type-graphql with fastify-gql with has support for graphql-jit.
When I enable jit in fastify-gql, first-time everything works fine, but second time I use a mutation with returns a Union. I get the error below.

Abstract type <Name>Union must resolve to an Object type at runtime for field Mutation.<Mutation_Name>. Either the <Name>Union type should provide a \"resolveType\" function or each possible types should provide an \"isTypeOf\" function.

This error only comes when a mutation returns a Union. Other than that every mutation works fine.
But when I disable the jit, everything works fine. I don't know if this is type-graphql specific error or graphql-jit error.

BTW, thanks for this awesomee lib ❤️

Enviorment (please complete the following information):

• OS: Linux 5.5
• Node: ^12.16.0
• Package version: ^0.18.0-beta.10
• TypeScript version: ^3.8.2
• fastify: ^2.12.0
• fastify-gql: ^3.0.6

[MichalLytek]

I don't know if this is type-graphql specific error or graphql-jit error.

If something works without JIT, it's a problem with graphql-jit. To achieve high speed they make some shortcuts and some contstructs that are legal in graphql-js execution might not work in graphql-jit.

Please open an issue on their repo and then try to find a cause of this issue - maybe we can make some workaround for that case.

[numToStr]

Thanks for the explanation. I will open an issue on their repo.

[MichalLytek]

Closing for a housekeeping purposes 🔒

[rfgamaral]

I'm interested in this as well. Have you opened an issued already @numToStr? Can you please link it here? I can't find it.

[StarpTech]

Hi, we run into the same limitation it would great to find out what's wrong to open a detailed error report in graphql-jit.

[StarpTech]

Can we address this zalando-incubator/graphql-jit#69?