[sqlalchemy] Re: Troublesome relation
Hi,
VulnResDesc.mapper.add_property('rawvulns', sao.relation(VulnRes.mapper,
primaryjoin = sa.and_(VulnRes.targetid == VulnResDesc.targetid,
VulnMap.vulndescid == VulnResDesc.id,
VulnMap.tool == VulnRes.tool,
VulnMap.toolvulnid == VulnRes.toolvulnid),
foreign_keys = [VulnResDesc.c.targetid, VulnResDesc.c.id],
viewonly = True,
uselist = True))
ultimately all relations distill the join condition into a set of pairs,
above it would be:
[ (VulnResDesc.targetid, VulnRes.targetid) ]
I still don't quite understand this I'm afraid, I though there were more
columns involved - VulnResDesc.id, VulnRes.tool, VulnRes.toolvulnid.
So using foreign_keys which only deals with these columns should probably
work by itself:
foreign_keys = [VulnResDesc.targetid]
The remote_side argument, if needed, would be remote_side=
[VulnRes.targetid] since that is the right side of the relation.
Ok, if I set foreign_keys like that, it doesn't ask me for a remote_side,
BUT when I come to actually use the relation, the query runs for a long
time, in fact my web app times out before it completes.
Have you got any other suggestions? I am pretty damn stuck here. And the
bugger is, this used to work just fine!
Paul
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[sqlalchemy] Re: Troublesome relation
Hi, I still don't quite understand this I'm afraid, I though there were more columns involved - VulnResDesc.id, VulnRes.tool, VulnRes.toolvulnid. So you know, this isn't urgent now. I've rewritten the mapper property as a property on my class, and that works straight off, without any voodoo. But I am still interested in any thoughts you have - obviously a proper relation is the way to do if I want to use the eagerloaded in future, for example. Paul --~--~-~--~~~---~--~~ 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: Ordering null dates
Only for the record: I just noticed that another simple workaround is ordering by something like start_date is not null, start_date, end_date is null, end_date. SA could also implement nullsfirst()/ nullslast() that way if the database engine does not support nulls first/nulls last. --~--~-~--~~~---~--~~ 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: sqlalchemy in virtualenv Instructions
Lukasz Szybalski wrote: I have mysqldb installed in the system wide install how do I tell virtualenv to use it? I don't see a need to install it in virtualenv again so I guess I just have to givea right path? How, and in which file? Thanks, Lucas File /usr/local/pythonenv/BASELINE/lib/python2.4/site-packages/SQL Alchemy-0.4.6dev_r4675-py2.4.egg/sqlalchemy/databases/mysql.py, line 1430, in dbapi import MySQLdb as mysql ImportError: No module named MySQLdb When you create the virtualenv, there is a '--no-site-packages' switch which determines whether the system-wide site-packages directory will be on the search path or not. If you didn't provide this switch, then MySQLdb should be visible. (Documented at http://pypi.python.org/pypi/virtualenv#the-no-site-packages-option) From your python prompt, type import sys; print '\n'.join(sys.path) to see your search path. If the directory containing your MySQLdb installation is not in there, you have a problem. Hope that helps, Simon --~--~-~--~~~---~--~~ 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] polymorphism without extra table
Hi! I have following situation: I have 3 tables which stand as a base for other stuff: table_virtual_categories = Table(virtual_categories, meta, Column(id, Integer, primary_key = True), Column(id_parent, Integer, ForeignKey(virtual_categories.id)), Column(visible, Boolean, nullable=False, default=False), Column(kind, String(10), nullable=False), ) table_virtual_items = Table(virtual_items, meta, Column(id, Integer, primary_key = True), Column(id_category, Integer, ForeignKey(virtual_categories.id), nullable=False), Column(kind, String(10), nullable=False), ) table_virtual_proposals = Table(virtual_proposals, meta, Column(id, Integer, primary_key = True), Column(id_previous_version, Integer, ForeignKey(virtual_proposals.id)), Column(id_item, Integer, ForeignKey(virtual_items.id), nullable=False), Column(title, Unicode(100)), Column(dt_inserted, DateTime, nullable=False, default=func.now()), Column(dt_valid_from, DateTime), Column(dt_valid_to, DateTime), Column(version, LUnicode(100), nullable=False), Column(state, Integer, nullable=False) ) Now I have some situations where I need to inherit some of these tables but I want to keep the schema category-item-proposal: E.g. articles: I need special columns for categories and proposals but articles (~items) have no extra columns: table_articles_categories = Table(articles_categories, meta, Column(id, Integer, ForeignKey(virtual_categories), primary_key = True), Column(description, UnicodeText), ) table_articles = Table(articles, meta, Column(id, Integer, ForeignKey(virtual_items), primary_key = True) ) table_article_proposals = Table(article_proposals, meta, Column(id, Integer, ForeignKey(virtual_proposals), primary_key = True), Column(body, UnicodeText), ) So as you can see the table articles is quite redundant because it has only the primary key column but I didn't find any other way to select articles directly from the table virtual_items according to the column kind without joining to another specialized table. Is there any way around this to omit the articles table? Thanks for advices. David --~--~-~--~~~---~--~~ 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: polymorphism without extra table
and you mappers look like? why u need to inherit articles at all then? just use the base.. On Tuesday 10 June 2008 15:34:21 ml wrote: Hi! I have following situation: I have 3 tables which stand as a base for other stuff: table_virtual_categories = Table(virtual_categories, meta, Column(id, Integer, primary_key = True), Column(id_parent, Integer, ForeignKey(virtual_categories.id)), Column(visible, Boolean, nullable=False, default=False), Column(kind, String(10), nullable=False), ) table_virtual_items = Table(virtual_items, meta, Column(id, Integer, primary_key = True), Column(id_category, Integer, ForeignKey(virtual_categories.id), nullable=False), Column(kind, String(10), nullable=False), ) table_virtual_proposals = Table(virtual_proposals, meta, Column(id, Integer, primary_key = True), Column(id_previous_version, Integer, ForeignKey(virtual_proposals.id)), Column(id_item, Integer, ForeignKey(virtual_items.id), nullable=False), Column(title, Unicode(100)), Column(dt_inserted, DateTime, nullable=False, default=func.now()), Column(dt_valid_from, DateTime), Column(dt_valid_to, DateTime), Column(version, LUnicode(100), nullable=False), Column(state, Integer, nullable=False) ) Now I have some situations where I need to inherit some of these tables but I want to keep the schema category-item-proposal: E.g. articles: I need special columns for categories and proposals but articles (~items) have no extra columns: table_articles_categories = Table(articles_categories, meta, Column(id, Integer, ForeignKey(virtual_categories), primary_key = True), Column(description, UnicodeText), ) table_articles = Table(articles, meta, Column(id, Integer, ForeignKey(virtual_items), primary_key = True) ) table_article_proposals = Table(article_proposals, meta, Column(id, Integer, ForeignKey(virtual_proposals), primary_key = True), Column(body, UnicodeText), ) So as you can see the table articles is quite redundant because it has only the primary key column but I didn't find any other way to select articles directly from the table virtual_items according to the column kind without joining to another specialized table. Is there any way around this to omit the articles table? Thanks for advices. David --~--~-~--~~~---~--~~ 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] assocClass.linkA == A.id fails
g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen --~--~-~--~~~---~--~~ 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: Troublesome relation
On Jun 10, 2008, at 4:29 AM, Paul Johnston wrote:
Hi,
VulnResDesc.mapper.add_property('rawvulns',
sao.relation(VulnRes.mapper,
primaryjoin = sa.and_(VulnRes.targetid == VulnResDesc.targetid,
VulnMap.vulndescid == VulnResDesc.id,
VulnMap.tool == VulnRes.tool,
VulnMap.toolvulnid == VulnRes.toolvulnid),
foreign_keys = [VulnResDesc.c.targetid, VulnResDesc.c.id],
viewonly = True,
uselist = True))
ultimately all relations distill the join condition into a set of
pairs, above it would be:
[ (VulnResDesc.targetid, VulnRes.targetid) ]
I still don't quite understand this I'm afraid, I though there were
more columns involved - VulnResDesc.id, VulnRes.tool,
VulnRes.toolvulnid.
So using foreign_keys which only deals with these columns should
probably work by itself:
foreign_keys = [VulnResDesc.targetid]
The remote_side argument, if needed, would be remote_side=
[VulnRes.targetid] since that is the right side of the relation.
Ok, if I set foreign_keys like that, it doesn't ask me for a
remote_side, BUT when I come to actually use the relation, the query
runs for a long time, in fact my web app times out before it
completes.
in that case you'd probably want to set remote_side as well. the
query running forever implies that the lazyload isnt actually putting
a bind parameter in anywhere.
To see how these settings translate in the propertyloader, you can
turn on
logging
..logging
.getLogger('sqlalchemy.orm.properties').setLevel(logging.INFO) .
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[sqlalchemy] Re: assocClass.linkA == A.id fails
manytoone should be fine. try making a simplified test case (just any old many to one). On Jun 10, 2008, at 9:39 AM, [EMAIL PROTECTED] wrote: g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen --~--~-~--~~~---~--~~ 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: polymorphism without extra table
On Jun 10, 2008, at 8:34 AM, ml wrote: So as you can see the table articles is quite redundant because it has only the primary key column but I didn't find any other way to select articles directly from the table virtual_items according to the column kind without joining to another specialized table. Is there any way around this to omit the articles table? dont put any table in the Article mapper. It will inherit from the base using single table inheritance. --~--~-~--~~~---~--~~ 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: polymorphism without extra table
that's it! great, thanks! Michael Bayer napsal(a): On Jun 10, 2008, at 8:34 AM, ml wrote: So as you can see the table articles is quite redundant because it has only the primary key column but I didn't find any other way to select articles directly from the table virtual_items according to the column kind without joining to another specialized table. Is there any way around this to omit the articles table? dont put any table in the Article mapper. It will inherit from the base using single table inheritance. --~--~-~--~~~---~--~~ 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: sqlalchemy in virtualenv Instructions
On Tue, Jun 10, 2008 at 6:12 AM, King Simon-NFHD78 [EMAIL PROTECTED] wrote: Lukasz Szybalski wrote: I have mysqldb installed in the system wide install how do I tell virtualenv to use it? I don't see a need to install it in virtualenv again so I guess I just have to givea right path? How, and in which file? Thanks, Lucas File /usr/local/pythonenv/BASELINE/lib/python2.4/site-packages/SQL Alchemy-0.4.6dev_r4675-py2.4.egg/sqlalchemy/databases/mysql.py, line 1430, in dbapi import MySQLdb as mysql ImportError: No module named MySQLdb When you create the virtualenv, there is a '--no-site-packages' switch which determines whether the system-wide site-packages directory will be on the search path or not. If you didn't provide this switch, then MySQLdb should be visible. (Documented at http://pypi.python.org/pypi/virtualenv#the-no-site-packages-option) From your python prompt, type import sys; print '\n'.join(sys.path) Your command actually doesn't show the virtualenv? Is that how it suppossed to be? :~$ source /usr/local/pythonenv/BASELINE/bin/activate (BASELINE)[EMAIL PROTECTED]:~$ python Python 2.4.4 (#2, Apr 5 2007, 20:11:18) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2 Type help, copyright, credits or license for more information. import sys; print '\n'.join(sys.path) /usr/lib/python2.4/site-packages/Dabo-0.8.3-py2.4.egg /usr/lib/python2.4/site-packages/pyodbc-0.0.0-py2.4-linux-i686.egg /usr/lib/python2.4/site-packages/Sphinx-0.1.61950-py2.4.egg /usr/lib/python2.4/site-packages/Pygments-0.9-py2.4.egg /usr/lib/python24.zip /usr/lib/python2.4 /usr/lib/python2.4/plat-linux2 /usr/lib/python2.4/lib-tk /usr/lib/python2.4/lib-dynload /usr/local/lib/python2.4/site-packages /usr/lib/python2.4/site-packages /usr/lib/python2.4/site-packages/Numeric /usr/lib/python2.4/site-packages/cairo /var/lib/python-support/python2.4 /usr/lib/python2.4/site-packages/gtk-2.0 /var/lib/python-support/python2.4/gtk-2.0 /usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode What I did is I regenerated the virtual env without the no-site-package part, (leaving everything the way it was, just rerunning the command) which added the system packages. I hope now when I do easy_install -U somesystempackage it will install the upgrade into the virtualenv location. Lucas --~--~-~--~~~---~--~~ 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: Insertion order not respecting FK relation
On Jun 10, 10:34 am, Malthe Borch [EMAIL PROTECTED] wrote:
I have an issue with SQLAlchemy planning to execute insertion tasks in
the wrong order.
Basically, I have a utility table Relations which is used to maintain
ordered list relations:
table = rdb.Table(
'relation',
metadata,
rdb.Column('id', rdb.Integer, primary_key=True, autoincrement=True),
rdb.Column('left', rdb.String(length=32),
rdb.ForeignKey(soup.uuid), index=True),
rdb.Column('right', rdb.String(length=32),
rdb.ForeignKey(soup.uuid)),
rdb.Column('order', rdb.Integer, nullable=False))
Now, I append a new, transient object to such an ordered list. That
means that SQLAlchemy would make two inserts. The problem is that the
tasks are ordered such that the *relation* is inserted before the object
that is the target of the relation!
This obviously raises an IntegrityError, since the foreign key
constraint is not satisfied.
My question is then: How do I tell SQLAlchemy to order them correctly?
\malthe
A self-referential relationship, when configured as many-to-one,
requires the remote_side argument to indicate this, as described in
http://www.sqlalchemy.org/docs/04/mappers.html#advdatamapping_relation_selfreferential
. Otherwise it defaults to one-to-many.
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[sqlalchemy] Re: Insertion order not respecting FK relation
Michael Bayer wrote: A self-referential relationship, when configured as many-to-one, requires the remote_side argument to indicate this, as described in http://www.sqlalchemy.org/docs/04/mappers.html#advdatamapping_relation_selfreferential . Otherwise it defaults to one-to-many. That sounds correct, but this was not about a self-referential relationship. The Relations table maps a one-to-many relationship from some object to a number of objects (ordered). Or am I missing something? \malthe --~--~-~--~~~---~--~~ 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] select + is not
this should be straightforward, I think... I'm trying to do select email_address from user where is_verified is not true ( or is not null or is not false ) This part is simple : Session.execute( sqlalchemy.select( [ User.c.email ] ) ) This part is not: Session.execute( sqlalchemy.select( [ User.c.email ] , .User.c.is_verified.# ) ) I can't figure that last bit out. There's nothing in ColumnOperators , and the is not , is stuff seems to be tucked away in literals. can anyone give me a suggestion? thanks! --~--~-~--~~~---~--~~ 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: assocClass.linkA == A.id fails
funny... just a plain relation, i've removed all the assoc stuff... what i am missing??? here the case, attached. no matter what, i doesnot work; older sa versions give different error... On Tuesday 10 June 2008 16:59:01 Michael Bayer wrote: manytoone should be fine. try making a simplified test case (just any old many to one). On Jun 10, 2008, at 9:39 AM, [EMAIL PROTECTED] wrote: g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~--- aa.py Description: application/python
[sqlalchemy] Re: sqlalchemy + IBM DB2 + OS X 10.5
Hi Binglmar I have replied to your post on IBM_DB Forum. Please Check out if you have missed it on http://groups.google.com/group/ibm_db/browse_thread/thread/4095e6ecfde7e63/535519afa04bf5db?hl=en#535519afa04bf5db Kindly let us know your thoughts. Thanks and Regards Tarun Pasrija On Jun 8, 6:32 pm, Bingimar [EMAIL PROTECTED] wrote: Hi, I'm new to this group, but I was wondering... I've been reading about the sqlalchemy and the db2, but according to the IBM tutorial, you need to install the db2 on the machine that you are developing for. So my questin is, is it possible to use sqlalchemy, db2 and a mac? kind regards Bjarni I. --~--~-~--~~~---~--~~ 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] Performance problem with Psyco
Hi.
I'm using Python 2.5.1 + SQLAlchemy + Psyco 1.6 for accelerating
Python computations. Everything works ok for SQLAchemy 0.4.4 (50%
performance boost), but for SQLAlchemy 0.4.5, 0.4.6 and latest SVN
version (0_4 branch) there is a huge slowdown and profiling shows that
SA's code takes much time:
ncalls tottime percall cumtime percall
filename:lineno(function)
10.0000.000 98.840 98.840 string:1(module)
10.0010.001 98.840 98.840 {execfile}
10.0520.052 98.837 98.837 model/bin/run_dbwork.py:
4(module)
14791.9440.001 88.7240.060 /home/users/artur/md/
system/trunk/model/... (_yieldData)
4202 84.1820.020 85.1260.020 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/util.py:
7(sort_tables)
21062.4460.001 46.5550.022 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
979(_save_obj)
20960.1330.000 42.6900.020 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
1226(_delete_obj)
16470.3030.0009.7670.006 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/scoping.py:
97(do)
1606371.3310.0003.0480.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
605(collection)
171720.7420.0002.5010.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
859(preexecute)
1450720.9920.0001.4710.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
521(polymorphic_tasks)
14780.0120.0001.1570.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/session.py:
944(_cascade_save_or_update)
14780.0270.0001.1450.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/session.py:
1236(_cascade_iterator)
14780.3190.0001.1230.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/compiler.py:
625(_get_colparams)
14780.4970.0001.1150.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
1309(cascade_iterator)
133020.5880.0000.6890.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/compiler.py:
631(create_bind_param)
88680.3600.0000.4940.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/properties.py:
438(cascade_iterator)
15080.0830.0000.4870.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/query.py:
945(iterate_instances)
For comparison here is profile stats dump for the same data processed
using SA 0.4.4:
ncalls tottime percall cumtime percall
filename:lineno(function)
10.0000.000 15.430 15.430 string:1(module)
10.0010.001 15.430 15.430 {execfile}
10.0500.050 15.427 15.427 model/bin/run_dbwork.py:
4(module)
14691.8270.001 13.0580.009 /home/users/artur/md/
system/trunk/model/... (_yieldData)
20802.4380.0015.3510.003 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/mapper.py:
914(_save_obj)
1590411.2530.0002.9380.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/unitofwork.py:
620(collection)
41470.4120.0002.7790.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/sql/util.py:
7(sort_tables)
169600.7260.0002.4280.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/unitofwork.py:
874(preexecute)
42881.4180.0002.3470.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/sql/visitors.py:
50(traverse)
16350.2920.0001.9960.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/scoping.py:
97(do)
20670.0970.0001.4780.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/mapper.py:
1152(_delete_obj)
1432620.9710.0001.4420.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/unitofwork.py:
531(polymorphic_tasks)
14680.3090.0001.0900.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/sql/compiler.py:
653(_get_colparams)
14680.0150.0000.6970.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/session.py:
922(_cascade_save_or_update)
14680.0230.0000.6820.000 /usr/share/python2.5/
[sqlalchemy] Re: Insertion order not respecting FK relation
would need to see mappings. On Jun 10, 2008, at 11:06 AM, Malthe Borch wrote: Michael Bayer wrote: A self-referential relationship, when configured as many-to-one, requires the remote_side argument to indicate this, as described in http://www.sqlalchemy.org/docs/04/mappers.html#advdatamapping_relation_selfreferential . Otherwise it defaults to one-to-many. That sounds correct, but this was not about a self-referential relationship. The Relations table maps a one-to-many relationship from some object to a number of objects (ordered). Or am I missing something? \malthe --~--~-~--~~~---~--~~ 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: How to calculate the size of the Oracle and PostgreSQL schema !!!!!
Hi, My development team and me are working in a application to migrate Oracle databases to PostgreSQL databases, and we need this information to do this. I've done successful migrations using autocode, http://code.google.com/p/sqlautocode/ The procedure, roughly is: 1) Use autocode to generate sqlalchemy definitions from your existing database 2) Create the tables in a new database - which can be a different kind of database 3) Use a sqlalchemy program to copy the table data As for the program to use for (3), I've used a throwaway script, but I think there's something in dbcook (http://pypi.python.org/pypi/dbcook/0.2) you could use. Paul --~--~-~--~~~---~--~~ 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: select db engine with create_session
-Original Message- From: sqlalchemy@googlegroups.com [mailto:[EMAIL PROTECTED] On Behalf Of lilo Sent: 10 June 2008 17:23 To: sqlalchemy Subject: [sqlalchemy] select db engine with create_session can someone tell me how session chooses the right db engine to insert records in this example: http://www.sqlalchemy.org/trac/browser/sqlalchemy/trunk/exampl es/sharding/attribute_shard.py#L184? (I've never used the sharding support before, so this is a guess) On line 150, the create_session factory function gets configured with the shard_chooser, id_chooser and query_chooser functions. The shard_chooser function is defined on line 111 and looks like this: 111 def shard_chooser(mapper, instance, clause=None): 112 if isinstance(instance, WeatherLocation): 113 return shard_lookup[instance.continent] 114 else: 115 return shard_chooser(mapper, instance.location) So if the instance being saved is a WeatherLocation object, then the shard_lookup dictionary is used to return the appropriate db engine. Otherwise, the instance is assumed to be a Report object, and so it calls itself recursively with the Report's location. I hope that helps - I'm sure someone will correct me if I'm wrong. Simon --~--~-~--~~~---~--~~ 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: How to calculate the size of the Oracle and PostgreSQL schema !!!!!
On Tuesday 10 June 2008 20:22:08 Paul Johnston wrote: Hi, My development team and me are working in a application to migrate Oracle databases to PostgreSQL databases, and we need this information to do this. I've done successful migrations using autocode, http://code.google.com/p/sqlautocode/ The procedure, roughly is: 1) Use autocode to generate sqlalchemy definitions from your existing database 2) Create the tables in a new database - which can be a different kind of database 3) Use a sqlalchemy program to copy the table data As for the program to use for (3), I've used a throwaway script, but I think there's something in dbcook (http://pypi.python.org/pypi/dbcook/0.2) you could use. it also has autocode-like script called autoload (will need touching for back-mapping oracle types), a schema and data copiers, and a metadata-diff; see dbcook/misc/metadata/; these are all using plain sqlalchemy. e.g. $ python copyall.py srcurl desturl will (eventualy) autoload and copy everything --~--~-~--~~~---~--~~ 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: select + is not
what DB backend ? often you can just compare to 1 or 0. On Jun 10, 2008, at 12:03 PM, Jonathan Vanasco wrote: this should be straightforward, I think... I'm trying to do select email_address from user where is_verified is not true ( or is not null or is not false ) This part is simple : Session.execute( sqlalchemy.select( [ User.c.email ] ) ) This part is not: Session .execute ( sqlalchemy .select( [ User.c.email ] , .User.c.is_verified.# ) ) I can't figure that last bit out. There's nothing in ColumnOperators , and the is not , is stuff seems to be tucked away in literals. can anyone give me a suggestion? thanks! --~--~-~--~~~---~--~~ 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: Performance problem with Psyco
these two stack traces appear to show completely different operations
proceeding (in one its a flush with a delete occuring, the other its
performing an INSERT or UPDATE).
my vague understanding of psyco is that it can be quite arbitrary as
to what kind of code it can improve and what kinds it cannot.
Therefore SA can never really make any guarantee of psyco working
exactly the same way across releases.
There has been very little changed as far as the flush() procedure
across 0.4.4 and 0.4.5, except for some cascade fixes regarding
orphans (detailed in CHANGES). I would first take a look at the SQL
being issued as the first source of speed differences; if in 0.4.5
there's suddenly a whole series of deletes occuring which do not
within 0.4.4, then that's the source of the difference.
On Jun 10, 2008, at 1:09 PM, Artur Siekielski wrote:
Hi.
I'm using Python 2.5.1 + SQLAlchemy + Psyco 1.6 for accelerating
Python computations. Everything works ok for SQLAchemy 0.4.4 (50%
performance boost), but for SQLAlchemy 0.4.5, 0.4.6 and latest SVN
version (0_4 branch) there is a huge slowdown and profiling shows that
SA's code takes much time:
ncalls tottime percall cumtime percall
filename:lineno(function)
10.0000.000 98.840 98.840 string:1(module)
10.0010.001 98.840 98.840 {execfile}
10.0520.052 98.837 98.837 model/bin/run_dbwork.py:
4(module)
14791.9440.001 88.7240.060 /home/users/artur/md/
system/trunk/model/... (_yieldData)
4202 84.1820.020 85.1260.020 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/util.py:
7(sort_tables)
21062.4460.001 46.5550.022 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
979(_save_obj)
20960.1330.000 42.6900.020 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
1226(_delete_obj)
16470.3030.0009.7670.006 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/scoping.py:
97(do)
1606371.3310.0003.0480.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
605(collection)
171720.7420.0002.5010.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
859(preexecute)
1450720.9920.0001.4710.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/unitofwork.py:
521(polymorphic_tasks)
14780.0120.0001.1570.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/session.py:
944(_cascade_save_or_update)
14780.0270.0001.1450.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/session.py:
1236(_cascade_iterator)
14780.3190.0001.1230.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/compiler.py:
625(_get_colparams)
14780.4970.0001.1150.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/mapper.py:
1309(cascade_iterator)
133020.5880.0000.6890.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/sql/compiler.py:
631(create_bind_param)
88680.3600.0000.4940.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/properties.py:
438(cascade_iterator)
15080.0830.0000.4870.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.6-py2.5.egg/sqlalchemy/orm/query.py:
945(iterate_instances)
For comparison here is profile stats dump for the same data processed
using SA 0.4.4:
ncalls tottime percall cumtime percall
filename:lineno(function)
10.0000.000 15.430 15.430 string:1(module)
10.0010.001 15.430 15.430 {execfile}
10.0500.050 15.427 15.427 model/bin/run_dbwork.py:
4(module)
14691.8270.001 13.0580.009 /home/users/artur/md/
system/trunk/model/... (_yieldData)
20802.4380.0015.3510.003 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/mapper.py:
914(_save_obj)
1590411.2530.0002.9380.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/unitofwork.py:
620(collection)
41470.4120.0002.7790.001 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/sql/util.py:
7(sort_tables)
169600.7260.0002.4280.000 /usr/share/python2.5/
site-packages/SQLAlchemy-0.4.4-py2.5.egg/sqlalchemy/orm/unitofwork.py:
874(preexecute)
42881.4180.0002.3470.001 /usr/share/python2.5/
[sqlalchemy] Re: assocClass.linkA == A.id fails
these are the valid comparisons: print AB.this == A() print AB.this_id == A.name On Jun 10, 2008, at 8:32 AM, [EMAIL PROTECTED] wrote: funny... just a plain relation, i've removed all the assoc stuff... what i am missing??? here the case, attached. no matter what, i doesnot work; older sa versions give different error... On Tuesday 10 June 2008 16:59:01 Michael Bayer wrote: manytoone should be fine. try making a simplified test case (just any old many to one). On Jun 10, 2008, at 9:39 AM, [EMAIL PROTECTED] wrote: g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen aa.py --~--~-~--~~~---~--~~ 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: Performance problem with Psyco
On Jun 10, 8:11 pm, Michael Bayer [EMAIL PROTECTED] wrote: I would first take a look at the SQL being issued as the first source of speed differences; if in 0.4.5 there's suddenly a whole series of deletes occuring which do not within 0.4.4, then that's the source of the difference. SQL is the same. These differences are also when I don't flush the Session. Also performance when not using Psyco is the same in 0.4.4 and 0.4.5. But switching Psyco on in 0.4.4 causes 50% performance increase and in 0.4.5 about 1000% decrease. --~--~-~--~~~---~--~~ 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: assocClass.linkA == A.id fails
these are the valid comparisons: print AB.this == A() mmh. i want these to be clauses, not plain comparisons i.e. AB.this==A.dbid --- same as tableAB.c.this==tableA.c.dbid instead it produces something like :param_1 = AB.this_id print AB.this_id == A.name and.. why this way works and the other way not? and same thing as above, this is not the clause i expect. On Jun 10, 2008, at 8:32 AM, [EMAIL PROTECTED] wrote: funny... just a plain relation, i've removed all the assoc stuff... what i am missing??? here the case, attached. no matter what, i doesnot work; older sa versions give different error... On Tuesday 10 June 2008 16:59:01 Michael Bayer wrote: manytoone should be fine. try making a simplified test case (just any old many to one). On Jun 10, 2008, at 9:39 AM, [EMAIL PROTECTED] wrote: g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen aa.py --~--~-~--~~~---~--~~ 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: Performance problem with Psyco
On Tuesday 10 June 2008 22:13:04 Artur Siekielski wrote: On Jun 10, 8:11 pm, Michael Bayer [EMAIL PROTECTED] wrote: I would first take a look at the SQL being issued as the first source of speed differences; if in 0.4.5 there's suddenly a whole series of deletes occuring which do not within 0.4.4, then that's the source of the difference. SQL is the same. These differences are also when I don't flush the Session. Also performance when not using Psyco is the same in 0.4.4 and 0.4.5. But switching Psyco on in 0.4.4 causes 50% performance increase and in 0.4.5 about 1000% decrease. well.. see the difference, the function that eats the time is sql.sort_tables. all else is nearly same. compare the two sources and see for yourself. the sort_tables() itself seems same, but traversing (recursive) has changed a lot. from depth first into breadth first or similar. something is going on there. AFAIremember psyco can optimize loops and arithmetics but is very bad with func-calls. profile both versions of that function without psyco and see what's difference in funccalls etc. ciao svilen --~--~-~--~~~---~--~~ 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: Insertion order not respecting FK relation
Michael Bayer wrote:
would need to see mappings.
First, let me mention that this issue only occurs on Postgres; I can't
replicate it on SQLite.
This is the many-to-many relation table (posted previously):
table = rdb.Table(
'relation',
metadata,
rdb.Column('id', rdb.Integer, primary_key=True, autoincrement=True),
rdb.Column('left', rdb.String(length=32),
rdb.ForeignKey(soup.uuid), index=True),
rdb.Column('right', rdb.String(length=32),
rdb.ForeignKey(soup.uuid)),
rdb.Column('order', rdb.Integer, nullable=False))
The soup table:
table = rdb.Table(
'soup',
metadata,
rdb.Column('id', rdb.Integer, primary_key=True, autoincrement=True),
rdb.Column('uuid', rdb.String(length=32), unique=True, index=True),
rdb.Column('spec', rdb.String, index=True),
)
The relation property that should behave like an ordered list:
-
orm.relation(
bootstrap.Relation,
primaryjoin=soup_table.c.uuid==relation_table.c.left,
collection_class=RelationList,
enable_typechecks=False)
I reproduce the problem like so:
1) Append some new item to the list, save and commit.
2) Repeat (1); an ``IntegrityError`` is raised:
IntegrityError: (IntegrityError) insert or update on table relation
violates foreign key constraint relation_right_fkey
DETAIL: Key (right)=(tcbb53226374211dd8a730017f2d1db9) is not
present in table soup.
'INSERT INTO relation (id, left, right, order) VALUES
(%(id)s, %(left)s, %(right)s, %(order)s)' {'left':
'tcbb31e28374211dd8a730017f2d1db9', 'right':
'tcbb53226374211dd8a730017f2d1db9', 'order': 1, 'id': 2L}
Any clues are greatly appreciated.
\malthe
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[sqlalchemy] Latest updates in SQL server 2008 tools and techniques
Find the latest updates in SQL server 2008 tools and techniques. A site for all your IT related needs such as data management, software testing and many more http://www.sqlserversoftware.blogspot.com --~--~-~--~~~---~--~~ 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: Latest updates in SQL server 2008 tools and techniques
sorry, bad mod. --~--~-~--~~~---~--~~ 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: assocClass.linkA == A.id fails
ok, so as i get it, descriptors of PropertyLoaders cannot be used in clauses. any idea then how to map something like this then without going down to tables: (pseudocode) Doc.ver == ver and ( Doc.dbid == Doc2Place.nazn and Doc2Place.rabmesto == ParamValueOwnership._rabotno_miasto or Doc.dbid == Doc2Position.nazn and ( Doc2Position.pozicia == ParamValueOwnership._pozicia or Doc2Position.pozicia == Position2Dept.pozicia and ( Position2Dept.otdel == ParamValueOwnership._otdel or Position2Dept.otdel == Dept2Dept.child and Dept2Dept.roditel == ParamValueOwnership._otdel ) ) ) and ParamValueOwnership.value == ParamValue.db_id where: Doc, Place, Position, Dept all have ParamValues (via m2m ParamValueOwnership) Doc has Place and Position (via m2m Doc2Place, Doc2Position) Postion has Dept (via m2m Pos2Dept) Dept has parent Dept (via m2m Dept2Dept) the last one is recursive, but i'll handle it somehow, adjacent sets or else. another weirdness of above, the ParamValueOwnership m2m has different links for diff. types of owners (mutualy exclusive), because otherwise i get multiple inheritance. can i handle multiple inheritance somehow? i.e. it looks like creating same object via different polymorhic hierarchies.. several polymorphic mappers over the different hierarchies? will that work? On Tuesday 10 June 2008 16:39:57 you wrote: g'day. i stepped on strange behavour (0.4 latest): class AB is an assoc proxy, .myb pointing to B; the clause AB.myb == B.dbid fails with NotImplementedError: File sqlalchemy/sql/expression.py, line 1191, in __eq__ return self.operate(operators.eq, other) File sqlalchemy/sql/expression.py, line 1315, in operate return o[0](self, op, other[0], *o[1:], **kwargs) File sqlalchemy/sql/expression.py, line 1277, in __compare obj = self._check_literal(obj) File sqlalchemy/sql/expression.py, line 1421, in _check_literal return other.expression_element() File sqlalchemy/orm/attributes.py, line 53, in expression_element return self.comparator.expression_element() File sqlalchemy/orm/interfaces.py, line 432, in expression_element return self.clause_element() File sqlalchemy/sql/expression.py, line 1170, in clause_element raise NotImplementedError() NotImplementedError these work (not the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen On Tuesday 10 June 2008 21:15:06 Michael Bayer wrote: these are the valid comparisons: print AB.this == A() print AB.this_id == A.name On Jun 10, 2008, at 8:32 AM, [EMAIL PROTECTED] wrote: funny... just a plain relation, i've removed all the assoc stuff... what i am missing??? here the case, attached. no matter what, i doesnot work; older sa versions give different error... these work (note the .property): AB.myb.property == B.dbid AB.myb == 3 AB.myb.property.direction is MANYTOONE seems i'm missing something?? any idea or prepare a test case? svilen aa.py --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
