From f4f122f97e7bd10d51250bdcca67f55cb8a76e4a Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 7 Feb 2025 03:36:13 +0000
Subject: [PATCH] chore(internal): minor type handling changes (#92)

---
 src/runwayml/_models.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/runwayml/_models.py b/src/runwayml/_models.py
index 12c34b7..c4401ff 100644
--- a/src/runwayml/_models.py
+++ b/src/runwayml/_models.py
@@ -426,10 +426,16 @@ def construct_type(*, value: object, type_: object) -> object:
 
     If the given value does not match the expected type then it is returned as-is.
     """
+
+    # store a reference to the original type we were given before we extract any inner
+    # types so that we can properly resolve forward references in `TypeAliasType` annotations
+    original_type = None
+
     # we allow `object` as the input type because otherwise, passing things like
     # `Literal['value']` will be reported as a type error by type checkers
     type_ = cast("type[object]", type_)
     if is_type_alias_type(type_):
+        original_type = type_  # type: ignore[unreachable]
         type_ = type_.__value__  # type: ignore[unreachable]
 
     # unwrap `Annotated[T, ...]` -> `T`
@@ -446,7 +452,7 @@ def construct_type(*, value: object, type_: object) -> object:
 
     if is_union(origin):
         try:
-            return validate_type(type_=cast("type[object]", type_), value=value)
+            return validate_type(type_=cast("type[object]", original_type or type_), value=value)
         except Exception:
             pass