🐛 Fix support for types with Optional[Annoated[x, f()]], e.g. id: Optional[pydantic.UUID4] (#1093)

tests/test_annotated_uuid.py

@@ -0,0 +1,26 @@
+import uuid
+from typing import Optional
+
+from sqlmodel import Field, Session, SQLModel, create_engine, select
+
+from tests.conftest import needs_pydanticv2
+
+
+@needs_pydanticv2
+def test_annotated_optional_types(clear_sqlmodel) -> None:
+    from pydantic import UUID4
+
+    class Hero(SQLModel, table=True):
+        # Pydantic UUID4 is: Annotated[UUID, UuidVersion(4)]
+        id: Optional[UUID4] = Field(default_factory=uuid.uuid4, primary_key=True)
+
+    engine = create_engine("sqlite:///:memory:")
+    SQLModel.metadata.create_all(engine)
+    with Session(engine) as db:
+        hero = Hero()
+        db.add(hero)
+        db.commit()
+        statement = select(Hero)
+        result = db.exec(statement).all()
+    assert len(result) == 1
+    assert isinstance(hero.id, uuid.UUID)