I am getting some kind of error from (apparently) cx_Oracle when
attempting to connect. I am using cx_Oracle 4.2 on my dev box, on
which this error does NOT happen. On the pre-production box, we had
cx_Oracle 4.3 which gave the error and the admin then installed 4.2,
which still gave the error (incomplete uninstall was my guess but that
did not lead anywhere). Both use SQLAlchemy beta1. I used to get this
on my dev machine but upgrading to cx_Oracle 4.2 fixed it (I had some
very old version before).
Here is the error and trace:
/usr/lib/python2.4/site-packages/baasandmed/DataModel.py in
initialiseDataModel(database=<sqlalchemy.orm.session.Session object>,
databaseEngine=Engine(oracle://register/[EMAIL PROTECTED]))
544 meta = MetaData(databaseEngine)
545
546 BAASANDMED_VIEW = Table('baasandmed_view', meta,
autoload = True)
547 BAASANDMED_FIELD = Table('baasandmed_field', meta,
autoload = True)
548 BAASANDMED_MINIREF_VALUES =
Table('baasandmed_miniref_values', meta, autoload = True)
BAASANDMED_VIEW undefined, global Table = <class
'sqlalchemy.schema.Table'>, meta = MetaData(Engine(oracle://register/
[EMAIL PROTECTED])), autoload undefined, builtin True = True
/usr/lib/python2.4/site-packages/sqlalchemy/schema.py in
__call__(self=<class 'sqlalchemy.schema.Table'>,
name='baasandmed_view', metadata=MetaData(Engine(oracle://register/
[EMAIL PROTECTED])), *args=(), **kwargs={})
115 autoload_with.reflecttable(table,
include_columns=include_columns)
116 else:
117
metadata._get_bind(raiseerr=True).reflecttable(table,
include_columns=include_columns)
118 except exceptions.NoSuchTableError:
119 del metadata.tables[key]
metadata = MetaData(Engine(oracle://register/[EMAIL PROTECTED])),
metadata._get_bind = <bound method MetaData._get_bind of
MetaData(Engine(oracle://register/[EMAIL PROTECTED]))>, raiseerr
undefined, builtin True = True, ).reflecttable undefined, table =
Table('baasandmed_view', MetaData(Engine(oracle://register/
[EMAIL PROTECTED])), schema=None), include_columns = None
/usr/lib/python2.4/site-packages/sqlalchemy/engine/base.py in
reflecttable(self=Engine(oracle://register/[EMAIL PROTECTED]),
table=Table('baasandmed_view', MetaData(Engine(oracle://register/
[EMAIL PROTECTED])), schema=None), connection=None,
include_columns=None)
1085
1086 if connection is None:
1087 conn = self.contextual_connect()
1088 else:
1089 conn = connection
conn undefined, self = Engine(oracle://register/[EMAIL PROTECTED]),
self.contextual_connect = <bound method Engine.contextual_connect of
Engine(oracle://register/[EMAIL PROTECTED])>
/usr/lib/python2.4/site-packages/sqlalchemy/engine/base.py in
contextual_connect(self=Engine(oracle://register/[EMAIL PROTECTED]),
close_with_result=False, **kwargs={})
1053 """
1054
1055 return Connection(self,
close_with_result=close_with_result, **kwargs)
1056
1057 def table_names(self, schema=None, connection=None):
global Connection = <class 'sqlalchemy.engine.base.Connection'>, self
= Engine(oracle://register/[EMAIL PROTECTED]), close_with_result =
False, kwargs = {}
/usr/lib/python2.4/site-packages/sqlalchemy/engine/base.py in
__init__(self=<sqlalchemy.engine.base.Connection object>,
engine=Engine(oracle://register/[EMAIL PROTECTED]), connection=None,
close_with_result=False, _branch=False)
537 def __init__(self, engine, connection=None,
close_with_result=False, _branch=False):
538 self.__engine = engine
539 self.__connection = connection or
engine.raw_connection()
540 self.__transaction = None
541 self.__close_with_result = close_with_result
self = <sqlalchemy.engine.base.Connection object>, self.__connection
undefined, connection = None, engine = Engine(oracle://register/
[EMAIL PROTECTED]), engine.raw_connection = <bound method
Engine.raw_connection of Engine(oracle://register/
[EMAIL PROTECTED])>
/usr/lib/python2.4/site-packages/sqlalchemy/engine/base.py in
raw_connection(self=Engine(oracle://register/[EMAIL PROTECTED]))
1100 """Return a DBAPI connection."""
1101
1102 return self.pool.connect()
1103
1104 def log(self, msg):
self = Engine(oracle://register/[EMAIL PROTECTED]), self.pool =
<sqlalchemy.pool.QueuePool object>, self.pool.connect = <bound method
QueuePool.connect of <sqlalchemy.pool.QueuePool object>>
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
connect(self=<sqlalchemy.pool.QueuePool object>)
157 def connect(self):
158 if not self._use_threadlocal:
159 return _ConnectionFairy(self).checkout()
160
161 try:
global _ConnectionFairy = <class 'sqlalchemy.pool._ConnectionFairy'>,
self = <sqlalchemy.pool.QueuePool object>, ).checkout undefined
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
__init__(self=<sqlalchemy.pool._ConnectionFairy object>,
pool=<sqlalchemy.pool.QueuePool object>)
262 self.__counter = 0
263 try:
264 self._connection_record = pool.get()
265 self.connection =
self._connection_record.get_connection()
266 except:
self = <sqlalchemy.pool._ConnectionFairy object>,
self._connection_record = None, pool = <sqlalchemy.pool.QueuePool
object>, pool.get = <bound method QueuePool.get of
<sqlalchemy.pool.QueuePool object>>
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
get(self=<sqlalchemy.pool.QueuePool object>)
172
173 def get(self):
174 return self.do_get()
175
176 def do_get(self):
self = <sqlalchemy.pool.QueuePool object>, self.do_get = <bound method
QueuePool.do_get of <sqlalchemy.pool.QueuePool object>>
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
do_get(self=<sqlalchemy.pool.QueuePool object>)
554
555 try:
556 con = self.create_connection()
557 self._overflow += 1
558 finally:
con undefined, self = <sqlalchemy.pool.QueuePool object>,
self.create_connection = <bound method QueuePool.create_connection of
<sqlalchemy.pool.QueuePool object>>
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
create_connection(self=<sqlalchemy.pool.QueuePool object>)
140
141 def create_connection(self):
142 return _ConnectionRecord(self)
143
144 def recreate(self):
global _ConnectionRecord = <class
'sqlalchemy.pool._ConnectionRecord'>, self =
<sqlalchemy.pool.QueuePool object>
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
__init__(self=<sqlalchemy.pool._ConnectionRecord object>,
pool=<sqlalchemy.pool.QueuePool object>)
200 def __init__(self, pool):
201 self.__pool = pool
202 self.connection = self.__connect()
203 self.properties = {}
204 if pool._on_connect:
self = <sqlalchemy.pool._ConnectionRecord object>, self.connection
undefined, self.__connect undefined
/usr/lib/python2.4/site-packages/sqlalchemy/pool.py in
__connect(self=<sqlalchemy.pool._ConnectionRecord object>)
248 try:
249 self.starttime = time.time()
250 connection = self.__pool._creator()
251 self.__pool.log("Created new connection %s" %
repr(connection))
252 return connection
connection undefined, self = <sqlalchemy.pool._ConnectionRecord
object>, self.__pool undefined
/usr/lib/python2.4/site-packages/sqlalchemy/engine/strategies.py in
connect()
72 return dbapi.connect(*cargs, **cparams)
73 except Exception, e:
74 raise exceptions.DBAPIError(None, None, e)
75 creator = kwargs.pop('creator', connect)
76
global exceptions = <module 'sqlalchemy.exceptions' from '/usr/lib/
python2.4/site-packages/sqlalchemy/exceptions.pyc'>,
exceptions.DBAPIError = <class sqlalchemy.exceptions.DBAPIError>,
builtin None = None, e = <exceptions.TypeError instance>
DBAPIError: (TypeError) argument 1 must be string or read-only buffer,
not None None None
args = ('(TypeError) argument 1 must be string or read-only
buffer, not None',)
orig = <exceptions.TypeError instance>
params = None
statement = None
Any ideas/suggestions? I don't know anything of the internals of
either SQLAlchemy or cx_Oracle so I am quite stumped.
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