Add compatibility layer for legacy SQLA versions

Author: fayazkhan

sqlalchemy_mptt/sqlalchemy_compat.py

@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+# vim:fenc=utf-8
+#
+# Copyright (c) 2025 Fayaz Yusuf Khan <fayaz.yusuf.khan@gmail.com>
+# Distributed under terms of the MIT license.
+"""Compatibility layer for SQLAlchemy versions."""
+import sqlalchemy as sa
+
+
+if sa.__version__ < '1.4':
+    from sqlalchemy.ext.declarative import declarative_base
+else:
+    from sqlalchemy.orm import declarative_base
+
+
+def select(*args, **kwargs):
+    """Compatibility function for select."""
+    if sa.__version__ < '1.4':
+        return sa.select(args, **kwargs)
+    else:
+        return sa.select(*args, **kwargs)
+
+
+def case(*args, **kwargs):
+    """Compatibility function for case."""
+    if sa.__version__ < '1.4':
+        return sa.case(args, **kwargs)
+    else:
+        return sa.case(*args, **kwargs)
+
+
+def get(session, model, id):
+    """Compatibility function for getting an object by ID."""
+    if sa.__version__ < '1.4':
+        return session.query(model).get(id)
+    else:
+        return session.get(model, id)
+
+
+__all__ = ["case", "declarative_base", "select"]