Update types

Author: patrick91

RELEASE.md

@@ -0,0 +1,20 @@
+Release type: patch
+
+This release updates the typing for the resolver argument in
+`strawberry.field`i 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:
+
+```python
+import strawberry
+
+
+async def get_user_age() -> int:
+    return 0
+
+
+@strawberry.type
+class User:
+    name: str
+    age: int = strawberry.field(resolver=get_user_age)
+```

strawberry/field.py

@@ -39,6 +39,7 @@
 _RESOLVER_TYPE = Union[
     StrawberryResolver[T],
     Callable[..., T],
+    Callable[..., Awaitable[T]],
     "staticmethod[T]",
     "classmethod[T]",
 ]

tests/pyright/test_fields_resolver_async.py

@@ -0,0 +1,54 @@
+from .utils import Result, requires_pyright, run_pyright, skip_on_windows
+
+pytestmark = [skip_on_windows, requires_pyright]
+
+CODE = """
+import strawberry
+
+async def get_user_age() -> int:
+    return 0
+
+
+@strawberry.type
+class User:
+    name: str
+    age: int = strawberry.field(resolver=get_user_age)
+
+
+User(name="Patrick")
+User(n="Patrick")
+
+reveal_type(User)
+reveal_type(User.__init__)
+"""
+
+
+def test_pyright():
+    results = run_pyright(CODE)
+
+    assert results == [
+        Result(
+            type="error",
+            message='No parameter named "n" (reportGeneralTypeIssues)',
+            line=15,
+            column=6,
+        ),
+        Result(
+            type="error",
+            message='Argument missing for parameter "name" (reportGeneralTypeIssues)',
+            line=15,
+            column=1,
+        ),
+        Result(
+            type="information",
+            message='Type of "User" is "Type[User]"',
+            line=17,
+            column=13,
+        ),
+        Result(
+            type="information",
+            message='Type of "User.__init__" is "(self: User, *, name: str) -> None"',
+            line=18,
+            column=13,
+        ),
+    ]