[sqlalchemy] Re: Emptying out the session of new objects
On Jan 4, 2008, at 9:46 PM, Dave Harrison wrote: Hey Mike, Below is a minimal test case that always produces the below failure for me under 0.4.2 but not under 0.4.1, OK, its actually something that was buggy in 0.4.1 but didnt produce a symptom, give r4003 a try which fixes this issue...0.4.2a is today --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: Emptying out the session of new objects
On Sunday 06 January 2008 05:30:04 Michael Bayer wrote: On Jan 4, 2008, at 9:46 PM, Dave Harrison wrote: Hey Mike, Below is a minimal test case that always produces the below failure for me under 0.4.2 but not under 0.4.1, OK, its actually something that was buggy in 0.4.1 but didnt produce a symptom, give r4003 a try which fixes this issue...0.4.2a is today Hi Mike, That seems to have solved it for me. Thanks for the quick turn around, SQLAlchemy and the team continue to amaze ! :-) Cheers Dave --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: Emptying out the session of new objects
Is there an easy way of flushing all objects that are categorised as new in the session ?? I think you can use session.clear(), it will remove objects from session, and persistent objects will stay on database. Att Alexandre --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: Emptying out the session of new objects
On Friday 04 January 2008 23:32:21 Alexandre da Silva wrote: Is there an easy way of flushing all objects that are categorised as new in the session ?? I think you can use session.clear(), it will remove objects from session, and persistent objects will stay on database. Att Alexandre I had been using session.clear up until now, but as of 0.4.2 I've found that I get this error for alot of my tests, object has no attribute '_sa_session_id' As background, the tests I have use a sqlite memory database, and on setUp do a meta.create_all and on tearDown do a meta.drop_all I've assumed that this error is due to me leaving objects around in the session, so my current theory is that I need to manually expunge the objects I create at the end of the test. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: Emptying out the session of new objects
On Friday 04 January 2008 14:44:32 Dave Harrison wrote: On Friday 04 January 2008 23:32:21 Alexandre da Silva wrote: Is there an easy way of flushing all objects that are categorised as new in the session ?? I think you can use session.clear(), it will remove objects from session, and persistent objects will stay on database. Att Alexandre I had been using session.clear up until now, but as of 0.4.2 I've found that I get this error for alot of my tests, object has no attribute '_sa_session_id' As background, the tests I have use a sqlite memory database, and on setUp do a meta.create_all and on tearDown do a meta.drop_all I've assumed that this error is due to me leaving objects around in the session, so my current theory is that I need to manually expunge the objects I create at the end of the test. the above means that the object has been removed from the session (which is what clear() does) BUT later someone (inside it) needs that session for something, e.g. to read some lazy-attribute or whatever. u may try to do clear_mappers() too - just a suggestion. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: Emptying out the session of new objects
On Saturday 05 January 2008 03:08:54 Michael Bayer wrote:
On Jan 4, 2008, at 7:44 AM, Dave Harrison wrote:
On Friday 04 January 2008 23:32:21 Alexandre da Silva wrote:
Is there an easy way of flushing all objects that are categorised
as new in the session ??
I think you can use session.clear(), it will remove objects from
session, and persistent objects will stay on database.
Att
Alexandre
I had been using session.clear up until now, but as of 0.4.2 I've
found that I get this error for alot of my tests,
object has no attribute '_sa_session_id'
thats a bug. can you please provide a reproducing test case ?
this is actually pretty serious and a new release will be available
the moment we fix this.
Hey Mike,
Below is a minimal test case that always produces the below failure
for me under 0.4.2 but not under 0.4.1,
Cheers
Dave
==
ERROR: test_repr (__main__.uScheduledEvent)
--
Traceback (most recent call last):
File ./test_db_minimal.py, line 19, in tearDown
db.session.clear()
File
/usr/local/lib/python2.5/site-packages/SQLAlchemy-0.4.2-py2.5.egg/sqlalchemy/orm/scoping.py,
line 74, in do
return getattr(self.registry(), name)(*args, **kwargs)
File
/usr/local/lib/python2.5/site-packages/SQLAlchemy-0.4.2-py2.5.egg/sqlalchemy/orm/session.py,
line 577, in clear
self._unattach(instance)
File
/usr/local/lib/python2.5/site-packages/SQLAlchemy-0.4.2-py2.5.egg/sqlalchemy/orm/session.py,
line 1039, in _unattach
if instance._sa_session_id == self.hash_key:
AttributeError: 'MonthlyEvent' object has no attribute '_sa_session_id'
--
dbapi_minimal.py --
import datetime, uuid
from sqlalchemy import *
from sqlalchemy.orm import *
session = scoped_session(sessionmaker(autoflush=False,
transactional=True))
mapper = session.mapper
metadata = MetaData()
## Static variables and mappings
EventType_Daily = 0
EventType_Weekly = 1
EventType_Monthly = 2
EventType_Yearly = 3
eventTable = Table(
'event',
metadata,
Column('id', Integer, primary_key=True),
Column('name', String(100), nullable=False, unique=True),
Column('type', Integer, nullable=False),
Column('action', BLOB), # Pickled arguments for running an
action
Column('step', Integer, nullable=False, default=1),
Column('fromDate', DateTime), # None indicates now
Column('untilDate', DateTime), # None indicates forever
Column('monthly_dayofweek', Boolean),
)
scheduledEventTable = Table(
'scheduledevent',
metadata,
Column('id', Integer, primary_key=True),
Column('event_id', Integer, ForeignKey('event.id')),
Column('runtime', DateTime),
)
class Event(object):
def __init__(self, name, action, step=1, fromDate=None,
untilDate=None):
action: Pickled ActionArgument object for running the
event
fromDate : First time to run this event
untilDate : Time at which this event is no longer valid
self.name = name
self.action = action
self.step = step
self.fromDate = fromDate
self.untilDate = untilDate
def next(self, last):
last: most recent timestamp when this event was executed
raise NotImplementedError(Events must provide a next())
def __repr__(self):
return Event type:%s id:%s % (self.typeName, self.id)
class MonthlyEvent(Event):
MonthlyEvent has an additional init arg of dayofweek.
E.G if (dayofweek == True) then do every first Monday
E.G if (dayofweek == False) then do every nth day of the month
[beware choosing a day 28 lest some months skip it]
def __init__(self, name, action, step=1, fromDate=None,
untilDate=None, dayofweek=True):
Event.__init__(self, name, action, step, fromDate, untilDate)
self.dayofweek = dayofweek
def next(self, last):
monthQuot,monthRem = divmod((last.month + self.step), 12)
# Div cycles to 0, so we need to handle this differently
# 0 indicates December in the current year
if monthRem == 0:
monthRem = 12
monthQuot = 0
incMonth = monthRem
incYear = last.year + monthQuot
newTS = datetime.datetime(
year = incYear,
month = incMonth,
day = last.day,
hour = self.fromDate.hour,
minute = self.fromDate.minute,
)
if newTS self.untilDate:
return None
return newTS
class ScheduledEvent(object):
This is an event that is waiting for its runtime to arrive
def __init__(self, event, runtime):
self.event = event
