DuplicatedTypeName exception raised for nested generics

[bikeshedder]

Using nested generics causes an invalid DuplicatedTypeName exception to be raised when using the same type twice.

Minimal reproducible example

from typing import Generic, TypeVar

import strawberry

T = TypeVar("T")

@strawberry.type
class Wrapper(Generic[T]):
    value: T

@strawberry.type
class Query:
    a: Wrapper[Wrapper[int]]
    b: Wrapper[Wrapper[int]]

schema = strawberry.Schema(query=Query)

Exception

strawberry.exceptions.duplicated_type_name.DuplicatedTypeName:
Type IntWrapperWrapper is defined multiple times in the schema

System Information

• Operating system: Ubuntu 22.04.1 LTS
• Strawberry version: The check was first introduced in 0.144 and up until 0.159 it fails.

Upvote & Fund

• We're using Polar.sh so you can upvote and help fund this issue.
• We receive the funding once the issue is completed & confirmed by you.
• Thank you in advance for helping prioritize & fund our backlog.

[yallxe]

Any updates on this?

[Skeen]

I'm also encountering this, is there any known workaround?

[alidin000]

Any update on this?

[bellini666]

For that example, do specializing the wrapper works? e.g.

from typing import Generic, TypeVar

import strawberry

T = TypeVar("T")

@strawberry.type
class Wrapper(Generic[T]):
    value: T

@strawberry.type
class IntWrapper(Wrapper[int]):
    ...

@strawberry.type
class Query:
    a: Wrapper[IntWrapper]
    b: Wrapper[IntWrapper]

schema = strawberry.Schema(query=Query)

This still a bug, but maybe that's a possible workaround for now?