I have a problem with SQL Alchemy 0.8.1 on Python 2.7 running on linux box
via mod_wsgi. From time to time it produces the InvalidRequestError: This
session is in 'prepared' state; no further SQL can be emitted within this
transaction. I use mod_wsgi with multiple processes of 1 thread per
prepared state is an internal state in the Session which occurs within the
transaction commit process. This error can occur in one of the following ways:
1. you have an after_commit() event handler which raised an exception, leaving
the Session in the prepared state without being able to
engine.execute(some string) doesn't know anything about what you are querying
or what kind of data is in the result, it is a pure pass-through to the DBAPI,
which is MySQL-Python by default here. So your issue is with mysql-python.
Either upgrade it, report a bug to them, or use a different
Hi all,
I had an arror in my code and i think i have reconstructed it as follows:
---
from sqlalchemy import Column, Integer, String
from sqlalchemy import create_engine
from
We've never supported del obj.attrname as a means of setting an attribute to
None (which translates to NULL in SQL). Setting the value to None explicitly
is preferred.
On Jul 12, 2013, at 12:16 PM, lars van gemerden l...@rational-it.com wrote:
Hi all,
I had an arror in my code and i
Hi,
I have the following concrete inheritance structure (simplified in fact...)
A -- B -- L1
A -- C -- L2
Where L1 and L2 have tables (T1, T2).
using declarative, I could define classes A,B and C as
AbstractConcreteBase, and therefore issue polymorphic queries including
L1,L2 (and any other
On Jul 12, 2013, at 12:49 PM, Alexandre Torres alexandre.tor...@gmail.com
wrote:
Hi,
I have the following concrete inheritance structure (simplified in fact...)
A -- B -- L1
A -- C -- L2
Where L1 and L2 have tables (T1, T2).
using declarative, I could define classes A,B and C as
You nailed it down damn straight! For some reason mod_wsgi was indead
configured to use threads instead of processes. Thanks a lot for the heads
up!
пятница, 12 июля 2013 г., 17:40:37 UTC+3 пользователь Michael Bayer написал:
2. you have concurrent access to the session such that one thread
Thank you Michael! It works very well!
It just looks like the classical thing is going to be aborted.
What gives you that impression? The entire ORM is built upon mapper(),
that's the most fundamental feature of the whole library. Declarative is
just an extension on top of it (hence its
Hello,
I am attempting to implement a relationship accross two MSSQL databases
that may or may not be on the samer server. The catch is that MSSQL does
not support cross database forgien key contraints (the tables must be in
the same db).
I am trying to to implement the relationship with a
Can i just override __delattr__ in a subclass of a declarative base to achieve
this anyway?
Cheers, Lars
Lars van Gemerden
l...@rational-it.com
+31 6 26 88 55 39
On 12 jul. 2013, at 18:28, Michael Bayer
Hi,
I've been struggling for a while trying to create a mapping that works with
both PostGIS and SQLite databases when dealing with DateTime.
Background: Production PostGIS database has been reduced and converted to a
spatialite database with the same schema for offline testing purposes.
After thinking on it some more, should InstrumentedAttribute.__delete__ even
exist then, or maybe raise a NotImplementedError?
CL
Lars van Gemerden
l...@rational-it.com
+31 6 26 88 55 39
On 12 jul. 2013, at 18:28,
I thought this could be of interest ot the mailing list:
def select(self, table, index=None, *args, **kwargs):
'''
Helper function which eases generation of SELECT statements
using indexes.
Arguments
-
table -- an instance of
I'd like a way to avoid the cost of repeatedly compiling the same query,
especially in the context of relationship caching.
Specifically now that I have object caching in place, I have created my own
keys where it is possible. However there are still some cases where I
cannot. In these cases
On Jul 12, 2013, at 5:35 PM, Victor Reichert vfr...@gmail.com wrote:
Simulated_Events.sim =
ServerName.Temp_DB.dbo.Simulation_Catalog_Table.Sims and
Simulated_Events.event_id =
ServerName.Temp_DB.dbo.Simulation_Catalog_Table.EventID
^
SyntaxError: invalid
On Jul 12, 2013, at 5:53 PM, Basil Veerman bveer...@uvic.ca wrote:
Hi,
I've been struggling for a while trying to create a mapping that works with
both PostGIS
what's a PostGIS database? do you mean a Postgresql database with spatial
extensions installed?
Background: Production
There's all kinds of things that __delete__ should possibly do, most likely
just do what you expect, i.e. set the value to NULL, but this would be changing
its behavior in a very backwards-incompatible way; such a change could only be
considered for 0.9.
Whats not clear is how exactly an
On Jul 12, 2013, at 7:03 PM, Amir Elaguizy aelag...@gmail.com wrote:
I'd like a way to avoid the cost of repeatedly compiling the same query,
especially in the context of relationship caching.
Specifically now that I have object caching in place, I have created my own
keys where it is
Here is a short example that illustrates the original error:
*Create Test Database:*
$ sqlite3 testing.sqlite
SQLite version 3.7.13 2012-06-11 02:05:22
Enter .help for instructions
Enter SQL statements terminated with a ;
sqlite BEGIN TRANSACTION;
sqlite CREATE TABLE 'obs_raw' ('obs_raw_id'
Right, DateTime + with_variant() + sqlite.DATETIME with a custom storage format
and regexp. *However*. There's an unfortunate case that the storage
format/regexp arguments, introduced in 0.8.0, are not actually working fully,
and I've just committed the fix. So you'll have to use 0.8.3 for
Hello all,
I have the following scenario:
I have 5 or 6 related sqlalchemy declarative models sitting in a pyramid
app. This occurs in the context of extending a pyramid application, where I
import/config.scan() these selected models from another pyramid app into a
new app. The thing is that
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