#36646: oracledb 3.4.0 TypeError: isinstance() arg 2 must be a type, a tuple of
types, or a union
-------------------------------------+-------------------------------------
Reporter: John Wagenleitner | Type:
| Uncategorized
Status: new | Component: Database
| layer (models, ORM)
Version: 5.2 | Severity: Normal
Keywords: Oracle | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
When running Django v5.2.7 with oracledb 3.4.0, the following traceback is
generated. In the 3.4.0 release they changed the definition of
{{{Binary}}} from an alias to {{{bytes}}} to a function
(https://github.com/oracle/python-
oracledb/blob/a71468238ea98f38a331afe0a0664b2fa707a294/src/oracledb/constructors.py#L37-L41).
The issue does not occur with oracledb 3.3.0.
{{{
Traceback (most recent call last):
File "C:\Users\johnwa\AppData\Roaming\uv\python\cpython-3.13.7-windows-
x86_64-none\Lib\threading.py", line 1043, in _bootstrap_inner
self.run()
~~~~~~~~^^
File "C:\Users\johnwa\AppData\Roaming\uv\python\cpython-3.13.7-windows-
x86_64-none\Lib\threading.py", line 994, in run
self._target(*self._args, **self._kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
~~^^^^^^^^^^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\core\management\commands\runserver.py", line 137, in
inner_run
self.check_migrations()
~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\core\management\base.py", line 587, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\migrations\executor.py", line 18, in __init__
self.loader = MigrationLoader(self.connection)
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\migrations\loader.py", line 58, in __init__
self.build_graph()
~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\migrations\loader.py", line 235, in build_graph
self.applied_migrations = recorder.applied_migrations()
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\migrations\recorder.py", line 89, in applied_migrations
if self.has_table():
~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\migrations\recorder.py", line 63, in has_table
with self.connection.cursor() as cursor:
~~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-packages\django\utils\asyncio.py",
line 26, in inner
return func(*args, **kwargs)
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\base\base.py", line 320, in cursor
return self._cursor()
~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\base\base.py", line 296, in _cursor
self.ensure_connection()
~~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-packages\django\utils\asyncio.py",
line 26, in inner
return func(*args, **kwargs)
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\base\base.py", line 279, in ensure_connection
self.connect()
~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-packages\django\utils\asyncio.py",
line 26, in inner
return func(*args, **kwargs)
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\base\base.py", line 258, in connect
self.init_connection_state()
~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\oracle\base.py", line 336, in
init_connection_state
cursor.execute(
~~~~~~~~~~~~~~^
"SELECT 1 FROM DUAL WHERE DUMMY %s"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
% self._standard_operators["contains"],
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
["X"],
^^^^^^
)
^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\oracle\base.py", line 630, in execute
query, params = self._fix_for_params(query, params,
unify_by_values=True)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\oracle\base.py", line 627, in _fix_for_params
return query, self._format_params(params)
~~~~~~~~~~~~~~~~~~~^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\oracle\base.py", line 555, in _format_params
return {k: OracleParam(v, self, True) for k, v in params.items()}
~~~~~~~~~~~^^^^^^^^^^^^^^^
File "C:\Projects\rsvp\.venv\Lib\site-
packages\django\db\backends\oracle\base.py", line 441, in __init__
elif isinstance(param, (Database.Binary, datetime.timedelta)):
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: isinstance() arg 2 must be a type, a tuple of types, or a union
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/36646>
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