On 4/29/15 11:00 AM, Bill Schindler wrote:
Here's the contents of session.dirty just prior to the commit. It
looks like what I expected, with no unexpected additional objects. Is
there anything in there that looks like it could cause the exception?
session.dirty = IdentitySet([
LiveSession(id=49, prodid=u'folio', userid=u'josh_saesan',
sessionid=u'7c8a0b87-0c13-455f-8d0f-9cd90f4eff38', courseid=None,
endpoint=u'tcp://192.168.5.32:21992',
isconnected=<sqlalchemy.sql.elements.False_ object at
0x6aed050>, connected=datetime.datetime(2015, 4, 28, 16, 18, 9,
391405, tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=-300,
name=None)), disconnected=<sqlalchemy.sql.functions.now at 0x6aed1d0;
now>),
LiveSession(id=45, prodid=u'pmp1', userid=u'josh_saesan',
sessionid=u'57047c05-26b1-4f46-b017-0be242c3fd11', courseid=20789,
endpoint=u'tcp://192.168.5.32:21992',
isconnected=<sqlalchemy.sql.elements.False_ object at 0x6a95d50>,
connected=datetime.datetime(2015, 4, 28, 14, 45, 18, 974124,
tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=-300, name=None)),
disconnected=<sqlalchemy.sql.functions.now at 0x6a95dd0; now>),
LiveSession(id=48, prodid=u'pmp1', userid=u'josh_saesan',
sessionid=u'd5ced200-58b4-41c1-9142-876ac1b83f70', courseid=20789,
endpoint=u'tcp://192.168.5.32:21992',
isconnected=<sqlalchemy.sql.elements.False_ object at 0x6a95ed0>,
connected=datetime.datetime(2015, 4, 28, 15, 1, 47, 528904,
tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=-300, name=None)),
disconnected=<sqlalchemy.sql.functions.now at 0x6aed090; now>),
LiveSession(id=47, prodid=u'pmp1', userid=u'steve_drees',
sessionid=u'be63ba27-4c50-47b4-bdae-6ccd0c7ec3df', courseid=None,
endpoint=u'tcp://192.168.5.32:21992',
isconnected=<sqlalchemy.sql.elements.False_ object at 0x6a95d90>,
connected=datetime.datetime(2015, 4, 28, 14, 46, 4, 879577,
tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=-300, name=None)),
disconnected=<sqlalchemy.sql.functions.now at 0x6a95f10; now>),
LiveSession(id=46, prodid=u'folio', userid=u'bills',
sessionid=u'15947462-0c01-4aa3-8ea2-3f05e095a80a', courseid=None,
endpoint=u'tcp://192.168.5.32:21992',
isconnected=<sqlalchemy.sql.elements.False_ object at 0x6aed190>,
connected=datetime.datetime(2015, 4, 28, 16, 18, 47, 999584,
tzinfo=psycopg2.tz.FixedOffsetTimezone(offset=-300, name=None)),
disconnected=<sqlalchemy.sql.functions.now at 0x6aed310; now>)])
yup, its the boolean + the SQL false expression
from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
class A(Base):
__tablename__ = 'a'
id = Column(Integer, primary_key=True)
data = Column(Boolean)
e = create_engine("sqlite://", echo=True)
Base.metadata.create_all(e)
s = Session(e)
s.add(A(data=None))
s.commit()
a1 = s.query(A).first()
a1.data = false()
s.commit()
i will commit the patch in the next few hours.
On Wednesday, April 29, 2015 at 6:39:12 AM UTC-7, Michael Bayer wrote:
On 4/29/15 9:25 AM, Bill Schindler wrote:
This error is being thrown on code that worked with 0.9.8. It
seems to be checking a comparison on something, but I can't
figure out which "this clause" the exception is referring to.
Here's the stripped-down code leading up to the commit:
ancient = utcnow() - timedelta(hours=8)
ancient_conn = (
(LiveSession.isconnected) &
(LiveSession.connected < ancient))
for conn in session.query(LiveSession).filter(ancient_conn):
conn.isconnected = False
conn.disconnected = func.now()
session.commit()
I've tried it without the loop and it fails about 75% of the time
with the same traceback. I'm also getting this exception on
another ORM object that has a string column and four timestamp
columns (and isn't updated in a loop). Test updating that object
also gives me the same exception about 75% of the time on flush.
Neither ORM object has any relationships or anything other than
straight column definitions.
File
"/opt/certwise-lcs/eggs/lcs.web.events-1.0.0-py2.7.egg/lcs/web/events/utility.py",
line 296, in _dead
session.commit()
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 790, in commit
self.transaction.commit()
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 392, in commit
self._prepare_impl()
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 372, in _prepare_impl
self.session.flush()
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 2004, in flush
self._flush(objects)
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 2122, in _flush
transaction.rollback(_capture_exception=True)
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/util/langhelpers.py",
line 60, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/session.py",
line 2086, in _flush
flush_context.execute()
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/unitofwork.py",
line 373, in execute
rec.execute(self)
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/unitofwork.py",
line 532, in execute
uow
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/persistence.py",
line 170, in save_obj
mapper, table, update)
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/persistence.py",
line 613, in _emit_update_statements
lambda rec: (
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/orm/persistence.py",
line 456, in _collect_update_commands
value, state.committed_state[propkey]):
File
"/opt/certwise-lcs/eggs/SQLAlchemy-1.0.2-py2.7-linux-x86_64.egg/sqlalchemy/sql/elements.py",
line 2726, in __bool__
raise TypeError("Boolean value of this clause is not defined")
exceptions.TypeError: Boolean value of this clause is not defined
this error is not related to the code illustrated above; it has to
do with an object that is present in session.dirty which has some
kind of SQL expression clause inside of its state, but also seems
related to using an odd kind of comparison function within a
custom type, likely a PickleType that is using a custom
"comparator" function.
I can create this stack trace exactly. But I have to do something
really weird to make it happen. It doesn't provide the failure
in 0.9.9 so is a regression. But super curious if you have
something in your mapping that looks like this:
from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
def comparator(a, b):
return a > b
class A(Base):
__tablename__ = 'a'
id = Column(Integer, primary_key=True)
data = Column(PickleType(comparator=comparator))
e = create_engine("sqlite://", echo=True)
Base.metadata.create_all(e)
s = Session(e)
s.add(A(data='some data'))
s.commit()
a1 = s.query(A).first()
a1.data = func.foo("im a SQL expression")
s.commit()
are you using PickleType, with a custom comparator that doesn't
come down to using "==", and are using a SQL expression as the
value to be persisted?
--
Bill
--
You received this message because you are subscribed to the
Google Groups "sqlalchemy" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to sqlalchemy+...@googlegroups.com <javascript:>.
To post to this group, send email to sqlal...@googlegroups.com
<javascript:>.
Visit this group at http://groups.google.com/group/sqlalchemy
<http://groups.google.com/group/sqlalchemy>.
For more options, visit https://groups.google.com/d/optout
<https://groups.google.com/d/optout>.
--
You received this message because you are subscribed to the Google
Groups "sqlalchemy" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to sqlalchemy+unsubscr...@googlegroups.com
<mailto:sqlalchemy+unsubscr...@googlegroups.com>.
To post to this group, send email to sqlalchemy@googlegroups.com
<mailto:sqlalchemy@googlegroups.com>.
Visit this group at http://groups.google.com/group/sqlalchemy.
For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sqlalchemy+unsubscr...@googlegroups.com.
To post to this group, send email to sqlalchemy@googlegroups.com.
Visit this group at http://groups.google.com/group/sqlalchemy.
For more options, visit https://groups.google.com/d/optout.
