Object is not an Class Error

Description

This error is thrown when applying @strawberry.type/interface/input to a non-class object, for example the following code will throw this error:

import strawberry


@strawberry.type
def a_function(): ...


@strawberry.type
class Query:
    field: a_function


schema = strawberry.Schema(query=Query)

This happens because Strawberry expects all enums to be subclasses of Enum.

How to fix this error

You can fix this error by making sure the class you're applying @strawberry.type/interface/input to is a class. For example, the following code will fix this error:

import strawberry


@strawberry.type
class AFunction:
    field: int


@strawberry.type
class Query:
    field: AFunction


schema = strawberry.Schema(query=Query)