Fix deprecation_reason not being copied in InputMutationExtension (#4353)

Author: youngjaekwon

RELEASE.md

@@ -0,0 +1,3 @@
+Release type: patch
+
+Fix `deprecation_reason` not being copied from arguments to auto-generated input type fields in `InputMutationExtension`.

strawberry/field_extensions/input_mutation.py

@@ -31,6 +31,7 @@ def apply(self, field: StrawberryField) -> None:
                 python_name=arg.python_name,
                 graphql_name=arg.graphql_name,
                 description=arg.description,
+                deprecation_reason=arg.deprecation_reason,
                 default=arg.default,
                 type_annotation=arg.type_annotation,
                 directives=tuple(arg.directives),

tests/schema/extensions/test_input_mutation.py

@@ -41,6 +41,12 @@ def create_fruit(
                 directives=[SomeDirective(some="foo", directive="bar")],
             ),
         ],
+        variety: Annotated[
+            str | None,
+            strawberry.argument(
+                deprecation_reason="Use `color` instead",
+            ),
+        ] = None,
     ) -> Fruit:
         return Fruit(
             name=name,
@@ -76,6 +82,7 @@ def test_schema():
 
       """The color of the fruit"""
       color: String! @some_directive(some: "foo", directive: "bar")
+      variety: String = null @deprecated(reason: "Use `color` instead")
     }
 
     type Fruit {