resolve lazy types when converting arguments (#1350)

* resolve lazy types when converting arguments

* add test for lazy type conversion

* add release.md

RELEASE.md

@@ -0,0 +1,3 @@
+Release type: patch
+
+Add logic to convert arguments of type LazyType.

strawberry/arguments.py

@@ -8,6 +8,7 @@
 from strawberry.annotation import StrawberryAnnotation
 from strawberry.custom_scalar import ScalarDefinition, ScalarWrapper
 from strawberry.enum import EnumDefinition
+from strawberry.lazy_type import LazyType
 from strawberry.type import StrawberryList, StrawberryOptional, StrawberryType
 from strawberry.utils.mixins import GraphQLNameMixin
 
@@ -124,6 +125,11 @@ def convert_argument(
     if isinstance(type_, EnumDefinition):
         return type_.wrapped_cls(value)
 
+    if isinstance(type_, LazyType):
+        return convert_argument(
+            value, type_.resolve_type(), scalar_registry, auto_camel_case
+        )
+
     if hasattr(type_, "_type_definition"):  # TODO: Replace with StrawberryInputObject
         type_definition: TypeDefinition = type_._type_definition  # type: ignore
 

tests/utils/test_arguments_converter.py

@@ -4,6 +4,7 @@
 import strawberry
 from strawberry.annotation import StrawberryAnnotation
 from strawberry.arguments import UNSET, StrawberryArgument, convert_arguments
+from strawberry.lazy_type import LazyType
 from strawberry.schema.types.scalar import DEFAULT_SCALAR_REGISTRY
 
 
@@ -70,6 +71,31 @@ def test_list():
     }
 
 
+@strawberry.input
+class LaziestType:
+    something: bool
+
+
+def test_lazy():
+    LazierType = LazyType["LaziestType", __name__]
+
+    args = {
+        "lazyArg": {"something": True},
+    }
+
+    arguments = [
+        StrawberryArgument(
+            graphql_name="lazyArg",
+            python_name="lazy_arg",
+            type_annotation=StrawberryAnnotation(LazierType),
+        ),
+    ]
+
+    assert convert_arguments(
+        args, arguments, scalar_registry=DEFAULT_SCALAR_REGISTRY
+    ) == {"lazy_arg": LaziestType(something=True)}
+
+
 def test_input_types():
     @strawberry.input
     class MyInput: