Add Awaitable in resolver type

[patrick91]

Description

This PR adds Awaitable inside our type for resolvers passed
to strawberry.field :)

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Issues Fixed or Closed by This PR

• Closes Additional type hints for strawberry.field - so that it can be used with async reolvers #2500

[codecov]

Codecov Report

Merging #2528 (a929e3f) into main (fd26cc0) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

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  Lines        7579     7579           
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  Misses        148      148           
  Partials      102      102           

[botberry]

Thanks for adding the RELEASE.md file!

Here's a preview of the changelog:

---

This release updates the typing for the resolver argument in
strawberry.fieldi to support async resolvers.
This means that now you won't get any type
error from Pyright when using async resolver, like the following example:

import strawberry


async def get_user_age() -> int:
    return 0


@strawberry.type
class User:
    name: str
    age: int = strawberry.field(resolver=get_user_age)

---

Here's the preview release card for twitter:

Here's the tweet text:

🆕 Release (next) is out! Thanks to @patrick91 for the PR 👏

Get it here 👉 https://github.com/strawberry-graphql/strawberry/releases/tag/(next)

[skilkis]

Looks very good @patrick91 ! Good tests too

[Mark90]

Hello!

It seems that this fix for pyright has made mypy unhappy. I can reproduce with this extra testcase in tests/mypy/test_fields.yml

- case: test_field_with_async_resolver
  main: |
    import strawberry

    async def get_user_age() -> int:
        return 0


    @strawberry.type
    class User:
        name: str
        age: int = strawberry.field(resolver=get_user_age)
  out: |

This returns:

E   pytest_mypy_plugins.utils.TypecheckAssertionError: Output is not expected:
E   Actual:
E     main:10: error: Argument "resolver" to "field" has incompatible type "Callable[[], Coroutine[Any, Any, int]]"; expected "Union[StrawberryResolver[<nothing>], Callable[..., <nothing>], Callable[..., Awaitable[<nothing>]], staticmethod[<nothing>], classmethod[<nothing>]]"  [arg-type] (diff)
E   Expected:
E     (empty)
====================

When I revert the resolver type change in strawberry/fields.py then the test passes.

[patrick91]

@Mark90 sorry about that! I'll take a look at this today

[patrick91]

@Mark90 I've opened an issue on Mypy's side: python/mypy#14669

If that doesn't get solved I'll try to find a work around 😊

[Mark90]

Thanks a lot for the quick action :)