add

2026-10-15 20:36:59 +08:00
commit 6bf949949c
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+# ext/asyncio/exc.py
+# Copyright (C) 2020-2026 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+from ... import exc
+
+
+class AsyncMethodRequired(exc.InvalidRequestError):
+    """an API can't be used because its result would not be
+    compatible with async"""
+
+
+class AsyncContextNotStarted(exc.InvalidRequestError):
+    """a startable context manager has not been started."""
+
+
+class AsyncContextAlreadyStarted(exc.InvalidRequestError):
+    """a startable context manager is already started."""
+
+
+class AsyncBindNotFound(exc.InvalidRequestError):
+    """a bind has no asyncio counterpart known to the
+    :class:`_asyncio.AsyncSession`.
+
+    .. versionadded:: 2.1
+
+    """