openlayer-ai · stainless-app · Jul 10, 2025 · Jul 10, 2025 · Jul 10, 2025
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.2.0-alpha.66"
+  ".": "0.2.0-alpha.67"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 0.2.0-alpha.67 (2025-07-10)
+
+Full Changelog: [v0.2.0-alpha.66...v0.2.0-alpha.67](https://github.com/openlayer-ai/openlayer-python/compare/v0.2.0-alpha.66...v0.2.0-alpha.67)
+
+### Features
+
+* **tracer:** enhance OpenlayerTracerProcessor with dynamic base class and type hinting ([1ea28d7](https://github.com/openlayer-ai/openlayer-python/commit/1ea28d7b3d55ed44625e633f1a9f088c94bfd069))
+
+
+### Bug Fixes
+
+* **parsing:** correctly handle nested discriminated unions ([a0cc200](https://github.com/openlayer-ai/openlayer-python/commit/a0cc2009bb376e85fd655468922c69f1288598ba))
+* **tracer:** update dictionary type annotation in OpenlayerTracerProcessor ([376ab2d](https://github.com/openlayer-ai/openlayer-python/commit/376ab2d1e8d4d96e8d7c1974056921a3f38ff685))
+
 ## 0.2.0-alpha.66 (2025-07-09)
 
 Full Changelog: [v0.2.0-alpha.65...v0.2.0-alpha.66](https://github.com/openlayer-ai/openlayer-python/compare/v0.2.0-alpha.65...v0.2.0-alpha.66)

diff --git a/pyproject.toml b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openlayer"
-version = "0.2.0-alpha.66"
+version = "0.2.0-alpha.67"
 description = "The official Python library for the openlayer API"
 dynamic = ["readme"]
 license = "Apache-2.0"

diff --git a/src/openlayer/_models.py b/src/openlayer/_models.py
@@ -2,9 +2,10 @@
 
 import os
 import inspect
-from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, cast
+from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, Optional, cast
 from datetime import date, datetime
 from typing_extensions import (
+    List,
     Unpack,
     Literal,
     ClassVar,
@@ -366,7 +367,7 @@ def _construct_field(value: object, field: FieldInfo, key: str) -> object:
     if type_ is None:
         raise RuntimeError(f"Unexpected field type is None for {key}")
 
-    return construct_type(value=value, type_=type_)
+    return construct_type(value=value, type_=type_, metadata=getattr(field, "metadata", None))
 
 
 def is_basemodel(type_: type) -> bool:
@@ -420,7 +421,7 @@ def construct_type_unchecked(*, value: object, type_: type[_T]) -> _T:
     return cast(_T, construct_type(value=value, type_=type_))
 
 
-def construct_type(*, value: object, type_: object) -> object:
+def construct_type(*, value: object, type_: object, metadata: Optional[List[Any]] = None) -> object:
     """Loose coercion to the expected type with construction of nested values.
 
     If the given value does not match the expected type then it is returned as-is.
@@ -438,8 +439,10 @@ def construct_type(*, value: object, type_: object) -> object:
         type_ = type_.__value__  # type: ignore[unreachable]
 
     # unwrap `Annotated[T, ...]` -> `T`
-    if is_annotated_type(type_):
-        meta: tuple[Any, ...] = get_args(type_)[1:]
+    if metadata is not None:
+        meta: tuple[Any, ...] = tuple(metadata)
+    elif is_annotated_type(type_):
+        meta = get_args(type_)[1:]
         type_ = extract_type_arg(type_, 0)
     else:
         meta = tuple()

diff --git a/src/openlayer/_version.py b/src/openlayer/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "openlayer"
-__version__ = "0.2.0-alpha.66"  # x-release-please-version
+__version__ = "0.2.0-alpha.67"  # x-release-please-version
diff --git a/tests/test_models.py b/tests/test_models.py
@@ -889,3 +889,48 @@ class ModelB(BaseModel):
     )
 
     assert isinstance(m, ModelB)
+
+
+def test_nested_discriminated_union() -> None:
+    class InnerType1(BaseModel):
+        type: Literal["type_1"]
+
+    class InnerModel(BaseModel):
+        inner_value: str
+
+    class InnerType2(BaseModel):
+        type: Literal["type_2"]
+        some_inner_model: InnerModel
+
+    class Type1(BaseModel):
+        base_type: Literal["base_type_1"]
+        value: Annotated[
+            Union[
+                InnerType1,
+                InnerType2,
+            ],
+            PropertyInfo(discriminator="type"),
+        ]
+
+    class Type2(BaseModel):
+        base_type: Literal["base_type_2"]
+
+    T = Annotated[
+        Union[
+            Type1,
+            Type2,
+        ],
+        PropertyInfo(discriminator="base_type"),
+    ]
+
+    model = construct_type(
+        type_=T,
+        value={
+            "base_type": "base_type_1",
+            "value": {
+                "type": "type_2",
+            },
+        },
+    )
+    assert isinstance(model, Type1)
+    assert isinstance(model.value, InnerType2)