Invalid Superclass Interface Error

Description

This error is thrown when you define a class that has the strawberry.input decorator but also inherits from one or more classes with the strawberry.interface decorator. The underlying reason for this is that in GraphQL, input types cannot implement interfaces. For example, the following code will throw this error:

import strawberry


@strawberry.interface
class SomeInterface:
    some_field: str


@strawberry.input
class SomeInput(SomeInterface):
    another_field: int