Missing arguments annotation Error

Description

This error is thrown when an argument is missing an annotation, for example the following code will throw this error:

import strawberry


@strawberry.type
class Query:
    @strawberry.field
    def hello(self, name) -> str:  #  <-- note name here is missing an annotation
        return f"hello {name}"


schema = strawberry.Schema(query=Query)  

This happens because Strawberry needs to know the type of every argument to be able to generate the correct GraphQL type.

How to fix this error

You can fix this error by adding an annotation to the argument, for example, the following code will fix this error:

import strawberry


@strawberry.type
class Query:
    @strawberry.field
    def hello(self, name: str) -> str:
        return f"hello {name}"


schema = strawberry.Schema(query=Query)