Hi,
Sorry for the delay. Marking the DBsession dirty after a non ORM operation
works for now.
Zope.sqlalchemy.mark_changed(DBSession())
Thanks for the info Simon
Srikanth Bemineni
On Tuesday, November 29, 2016 at 9:10:32 AM UTC-6, Mike Bayer wrote:
>
> Hi Srikanth, answers inline.
>
> On
Hi Srikanth, answers inline.
On 11/28/2016 10:04 PM, Srikanth Bemineni wrote:
Hi Mike,
I am using pyramid_tm as transaction manager which is part of the
pyramid framework. Is this the third party transaction manager that you
are mentioning about ?.
That, as well as zope.transaction, yes.
The "transaction" package is a system for coordinating transactions
between multiple systems:
https://pypi.python.org/pypi/transaction
For example, it could coordinate transactions between multiple SQL
databases, using 2-phase commit to ensure that either all are
committed or none are
Hi Mike,
I am using pyramid_tm as transaction manager which is part of the pyramid
framework. Is this the third party transaction manager that you are
mentioning about ?. Can you please tell us how pyramid_tm,
ZopeTransacationExtension and sqlachemy come together. Why are they so many
layers
I don't know if this is part of your problem, but:
1. metadata.create_all(Session.connection()) will not mark the session as dirty
2. Session.flush() is a no-op if the session is clean - it won't even
fire the "after_flush" event
3. ZopeTransactionExtension uses the after_flush event (or
On 11/27/2016 09:24 AM, Srikanth Bemineni wrote:
Hi Mike,
I even tried flushing and committing the transaction. But still the same
issue. I was trying to figure out why is getting rolled back. Please see
the below stack trace
that rollback is normal when the connection is returned to the
Hi Mike,
I even tried flushing and committing the transaction. But still the same
issue. I was trying to figure out why is getting rolled back. Please see
the below stack trace
DBSession = scoped_session(sessionmaker(extension=ZopeTransactionExtension
()))
with
you need to call commit() on a Session in order for the transaction to
be committed.
Also you should be able to attach session events to the scoped_session
object directly, the session event structure will extract the underlying
sessionmaker class as the target.
On 11/26/2016 01:56 PM,
Hi,
May be I celebrated little bit too early. It looks like for no obvious
reason the scoped_session rolls back the transaction right at the last
moment. Any idea on how to debug this ?
View.py
with session_shardid(DBSession(),table_hash):
Base.metadata.create_all(DBSession().connection())
Hi,
Hope this helps others
1. DBSession is scoped_session. Use DBSession() to get the actual session
https://pypi.python.org/pypi/zope.sqlalchemy
with session_shardid(DBSession(),table_hash):
Base.metadata.create_all(DBSession().connection())
2. AttributeError: 'SessionTransaction'
Hi,
Sorry some of the debug trace was missing from the previous post
WSGI app 0 (mountpoint='') ready in 2 seconds on interpreter 0x15dc190 pid:
10256 (default app)
Inside session_shardid
**
2016-11-25 21:34:50,808 INFO [sqlalchemy.engine.base.Engine:1140][b
'uWSGIWorker2Core0'] select
Hi,
I was not using the DBSession.connection() while creating the tables when
invoking the create_all function on the metadata. After fixing that issue I
end with an another issue. It looks like the session(scoped_session), where
I set the shard id, and the session that I receive, when the
Hi,
Just trying to integrate the recipe into my pyramid application. Sqlalchemy
1.1.4
How do we put an event on a sessionmaker() managed by scope_session in a
pyramid application. This doesn't seem to work. Is the connection already
established ?
engine = engine_from_config(settings,
On 11/25/2016 03:55 PM, Srikanth Bemineni wrote:
Hi Mike,
The more "high scale" way here if you're really doing
hundreds/thousands
of different sets of tables is to modify the SQL statements on
the way
out. That example is here:
Hi Mike,
The more "high scale" way here if you're really doing hundreds/thousands
> of different sets of tables is to modify the SQL statements on the way
> out. That example is here:
>
> https://bitbucket.org/zzzeek/sqlalchemy/wiki/UsageRecipes/SessionModifiedSQL
> . This does exactly the
On 11/24/2016 11:04 PM, Srikanth Bemineni wrote:
Hi,
I am using sqlalchemy in my pyramid application. I have situation here,
where I need to map a table on the fly in the application during run
time. I also dont want to re-map all tables, there are some table which
are defined using a
Hi,
I am using sqlalchemy in my pyramid application. I have situation here,
where I need to map a table on the fly in the application during run time.
I also dont want to re-map all tables, there are some table which are
defined using a declarative base. I need those mapping to remain as is.
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