some fixes

docs/reference/integrations.rst

@@ -46,10 +46,12 @@ Known limitations:
   - Only mapping to ``Table`` is supported,
     implementations for ``FromClause`` instances such as ``Subquery`` and ``Join`` are not provided.
 
+  - Mapping to ``dataclass`` and ``attrs`` are not supported.
+
   - It does not support registering order of mapped fields by design,
     so you should use manual mapping to list instead automatic ``as_list=True``.
 
-  - Relationships with custom ``collection_class`` is not supported.
+  - Relationships with custom ``collection_class`` are not supported.
 
   - All input fields of foreign keys and relationships are considered as optional
     due to user can pass only relationship instance or only foreign key value.

src/adaptix/_internal/model_tools/introspection/sqlalchemy.py

@@ -121,13 +121,13 @@ def _get_autoincrement_column(table: 'sqlalchemy.Table'):
 
 def _get_input_shape(
     tp: TypeHint,
-    table: 'FromClause',
+    table: 'Table',
     columns: 'ColumnCollection',
     relationships: 'ReadOnlyProperties[RelationshipProperty[Any]]',
     type_hints: Mapping[str, TypeHint],
 ) -> InputShape:
     # FromClause has no autoincrement_column
-    autoincrement_column = _get_autoincrement_column(table) if isinstance(table, sqlalchemy.Table) else None
+    autoincrement_column = _get_autoincrement_column(table)
     fields = []
     params = []
     for column in columns: