cleanup

Author: svlandeg

sqlmodel/main.py

@@ -40,7 +40,6 @@
     inspect,
 )
 from sqlalchemy import Enum as sa_Enum
-from sqlalchemy import types as sa_types
 from sqlalchemy.orm import (
     Mapped,
     RelationshipProperty,
@@ -656,16 +655,12 @@ def get_sqlalchemy_type(field: Any) -> Any:
     type_ = get_sa_type_from_field(field)
     metadata = get_field_metadata(field)
 
-    # If it's already an SQLAlchemy type (eg. AutoString), use it directly
-    if isinstance(type_, type) and issubclass(type_, sa_types.TypeEngine):
-        return type_
-
     # Checks for `Literal` type annotation
     if type_ is Literal:
         return AutoString
     # Check enums first as an enum can also be a str, needed by Pydantic/FastAPI
     if issubclass(type_, Enum):
-        return sa_Enum(cast(Type[Enum], type_))
+        return sa_Enum(type_)
     if issubclass(
         type_,
         (