Allow to use Enums in custom DB schema

Author: Christian Hattemer

Diff for: sqlmodel/main.py

@@ -645,6 +645,11 @@ def __init__(
             ModelMetaclass.__init__(cls, classname, bases, dict_, **kw)
 
 
+class SchemaEnum(sa_Enum):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, inherit_schema=True, **kwargs)
+
+
 def get_sqlalchemy_type(field: Any) -> Any:
     if IS_PYDANTIC_V2:
         field_info = field
@@ -659,7 +664,7 @@ def get_sqlalchemy_type(field: Any) -> Any:
 
     # Check enums first as an enum can also be a str, needed by Pydantic/FastAPI
     if issubclass(type_, Enum):
-        return sa_Enum(type_)
+        return SchemaEnum(type_)
     if issubclass(
         type_,
         (