🐛 Update type annotations for compatibility with Python 3.6

Author: tiangolo

sqlmodel/main.py

@@ -152,7 +152,7 @@ def Field(
     foreign_key: Optional[Any] = None,
     nullable: Union[bool, UndefinedType] = Undefined,
     index: Union[bool, UndefinedType] = Undefined,
-    sa_column: Union[Column[Any], UndefinedType] = Undefined,
+    sa_column: Union[Column, UndefinedType] = Undefined,  # type: ignore
     sa_column_args: Union[Sequence[Any], UndefinedType] = Undefined,
     sa_column_kwargs: Union[Mapping[str, Any], UndefinedType] = Undefined,
     schema_extra: Optional[Dict[str, Any]] = None,

sqlmodel/sql/sqltypes.py

@@ -8,7 +8,7 @@
 from sqlalchemy.types import CHAR, TypeDecorator
 
 
-class AutoString(types.TypeDecorator[types.String]):
+class AutoString(types.TypeDecorator):  # type: ignore
 
     impl = types.String
     cache_ok = True
@@ -23,7 +23,7 @@ def load_dialect_impl(self, dialect: Dialect) -> "types.TypeEngine[Any]":
 
 # Reference form SQLAlchemy docs: https://docs.sqlalchemy.org/en/14/core/custom_types.html#backend-agnostic-guid-type
 # with small modifications
-class GUID(TypeDecorator[Any]):
+class GUID(TypeDecorator):  # type: ignore
     """Platform-independent GUID type.
 
     Uses PostgreSQL's UUID type, otherwise uses
@@ -34,7 +34,7 @@ class GUID(TypeDecorator[Any]):
     impl = CHAR
     cache_ok = True
 
-    def load_dialect_impl(self, dialect: Dialect) -> TypeEngine[Any]:
+    def load_dialect_impl(self, dialect: Dialect) -> TypeEngine:  # type: ignore
         if dialect.name == "postgresql":
             return dialect.type_descriptor(UUID())  # type: ignore
         else: