Hi list,
I've been getting ResoruceClosedError with MySQL server, which worked
fine with SQLite.
I'am using Celery queue, and those erros always happen within the
celery tasks.
@celery.task
def do_something():
records = SomeTable.pop_timeout()
and for SomeTable.pop_timeout(),
Hi there,
Can someone give me an example of using update()?
Thanks.
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I've got an error that says the primary key is not unique. This
shouldn't be possible since my primary keys are unique IDs :S
This is only happening after I switched to a physical sqlite3 database
from the :memory: one
#BEGIN#
File Main.py, line 97, in module
MCS.addToTable()
Hi Conor,
Many apologies for being pushy but since I'm pretty much in the
processing of finishing up my code (due in two days), I wonder if you
could just take a look at the last three posts of mine---these
constitute the final hurdle and I'll be done :)
Cheers,
Az
On Jun 9, 9:46 pm, Conor
.
Your class definitions... are you defining both table and Class in one
go? Would I have to change the way my monteCarloBasic creates
instances of SimAllocation?
On Jun 9, 9:46 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/09/2010 02:45 PM, Az wrote:
Expected: students, supervisors
but now that we have a composite key, what
happens to the dictionary? However, the dictionary will just hold
information for the current run really.
On Jun 10, 6:33 pm, Az azfarul.is...@gmail.com wrote:
The pprintout was:
{type 'collections.defaultdict': 156,
type 'bool': 2,
type 'float
)
for attr in dir(supervisor):
if not attr.startswight('__'):
self.attr = deepcopy(self.attr, memo)
So this only overrides __deepcopy__ when I call it for a Supervisor
and not for any of the other classes right?
On Jun 10, 6:56 pm, Az azfarul.is...@gmail.com wrote:
So I laid them out
, given the usefulness of the database.
On Jun 9, 4:25 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/09/2010 12:44 AM, Az wrote:
Traceback (most recent call last):
File Main.py, line 39, in module
MCS.monteCarloBasic(trials)
File //MonteCarloSimulation.py, line 163
supervisor)
won't have to keep running the readData, monteCarloBasic, etc
functions just to access the DB (that would be poor indeed!).
On Jun 8, 3:07 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/07/2010 07:27 PM, Az wrote:
By default, deepcopy will make one copy of everything
,
uid, session_id, stud_id, alloc_proj, alloc_proj_rank) VALUES
(?, ?, ?, ?, ?, ?)' [1, '1d295f48-7386-11df-8e87-00264a052efc', 1,
5796, 119, 1]
Good news: Got the UUID working in a snap.
Bad news: See error :(
On Jun 9, 4:54 am, Az azfarul.is...@gmail.com wrote:
memo = {}
copied_students
) VALUES
(?, ?, ?, ?, ?, ?)' [1, '1d295f48-7386-11df-8e87-00264a052efc', 1,
5796, 119, 1]
Good news: Got the UUID working in a snap.
Bad news: See error :(
Note: This happened when I started using 'session.merge(temp_alloc)'
instead of 'session.add'
On Jun 9, 4:54 am, Az
is dependent on
your GUI toolkit.
My GUI toolkit is Tkinter?
On Jun 7, 4:01 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/06/2010 02:58 PM, Az wrote:
Hi Conor,
Basically I sat down and made some decisions and changes.
I've created an actual copy of the Student class as in I've now got
():
update_database(result)
ui_toolkit.post_callback(runs_in_ui_thread)
Thanks for that. Now I know what to search for (message, event queue,
callback) :)
On Jun 7, 10:50 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/07/2010 02:56 PM, Az wrote:
Sounds good. Just beware that deepcopy
):
Then best_node = studNew and we find ourselves at #[§§01]
But in short, studNew is the same as students which is mapped to
Student...
I need to get studNew into something that is mapped to
StudentDBRecord... is that where I use the function create_db_record
comes in?
On Jun 8, 1:27 am, Az azfarul.is
calculations, queries and output.
If I can sort these three things out -- this entire project is wrapped
up :)
Thanks in advance!
Az
On Jun 6, 4:39 am, Conor conor.edward.da...@gmail.com wrote:
On 06/05/2010 08:06 PM, Az wrote:
Cheers!
Creating a new instance of my mapped class and settings
run monteCarloBasic(trials) (since it writes to the
database). Will it rewrite it every time? Or will it keep appending to
it?
++
Az
On Jun 4, 10:17 pm, Conor conor.edward.da...@gmail.com wrote:
On 06/03/2010 02:33 PM, Az wrote:
Firstly, apologies if I'm demanding too much
, 4:39 am, Conor conor.edward.da...@gmail.com wrote:
On 06/05/2010 08:06 PM, Az wrote:
Cheers!
Creating a new instance of my mapped class and settings, manually.
Gotcha. I think this will be an easier solution for me.
Nah, I'm not in a web framework.
Additional Q:
+++
Currently
use the copy function I created?
students_copied = students.copied()?
And so if I used this version... my objects won't change (which was
why I wanted to use deepcopy) when I make changes to the copied
dictionary?
Thanks
Az
On Jun 6, 4:39 am, Conor conor.edward.da...@gmail.com wrote:
On 06/05
it down then)
On Jun 3, 7:41 pm, Michael Bayer mike...@zzzcomputing.com wrote:
On Jun 3, 2010, at 1:58 PM, Az wrote:
Owning session has been closed? Can I still use deepcopy if the
session has not been closed?
deepcopy has issues because SQLAlchemy places extra information on your
objects, i.e
wrote:
On Jun 3, 2010, at 1:24 AM, Az wrote:
+++ Questions +++
1. Is this the correct way to use sessions or am I sort of abusing
them?
I dont see any poor patterns of use above.
2. When should I close a session?
when you no longer need the usage of any of the objects associated
...@zzzcomputing.com wrote:
On Jun 3, 2010, at 1:58 PM, Az wrote:
Owning session has been closed? Can I still use deepcopy if the
session has not been closed?
deepcopy has issues because SQLAlchemy places extra information on your
objects, i.e. an _sa_instance_state attribute, that you dont want in your
)))
sqlalchemy.exc.UnboundExecutionError: Instance Project at 0x24c5c50
is not bound to a Session; attribute refresh operation cannot proceed
Is this something to do with the way I've been using the sessions?
---
Thanks,
Az
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put two-and-two together right now :(
On Jun 3, 6:24 am, Az azfarul.is...@gmail.com wrote:
In my code, I am currently adding to the session in various modules
(this is the same session since I'm importing it from my most
prominent module).
Some sample code would be:
## BEGIN CODE 1
Basically, I've got these simple classes mapped to tables, using
SQLAlchemy. I know they're missing a few items but those aren't
essential for highlighting the problem.
class Customer(object):
def __init__(self, uid, name, email):
self.uid = uid
self.name =
the scenario and I apologise for
that!
Az
On Apr 9, 4:16 pm, Michael Bayer mike...@zzzcomputing.com wrote:
Az wrote:
instance_dict(instance))
AttributeError: 'NoneType' object has no attribute 'get'
+++
I'm at a loss as to how to resolve this issue, if it is an issue. If
more information
Hi there,
I'm just trying to sort out some code implementation utilising
SQLAlchemy that should store some output for a Monte-Carlo simulation
I'm running.
The simulation works thus:
I have a dictionary of students, with their preferred projects and a
Monte-Carlo simulation that takes said
ask and I will provide it.
Kind regards,
Az
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sorry to tune in late, but how different is AmazonDB from googleDB?
googleDB seems like a plain non-relational DB like berkeleyDB/btrieve
kind of thing.
to map a relational and non-relational schemas in same way u need
higher level of abstraction - sqlalchemy is only about sql.
so i had an
On Friday 29 May 2009 20:53:04 Mike Conley wrote:
I need to compare database schemas (tables, column names, types,
constraints, etc.). Is there anything out there that uses
SQLAlchemy metadata to compare database schemas? or should I start
working on one?
here mine just for a diff:
try label the column in q2, say q2.maxgrade, then use that as
print s.query(A).filter( A.grade==q2.maxgrade)...
On Tuesday 12 May 2009 10:17:11 Max Ischenko wrote:
I'm trying to express the following SQL:
SELECT * FROM attendances a WHERE grade = (SELECT MAX(grade) FROM
attendances WHERE
u'd better edit a new copy and on save copy all back into original
then commit that one, on cancel abandon the new one (but beware of
m2m relations if u have them).
all else isn't safe/nice IMO.
On Wednesday 06 May 2009 17:25:47 Marcin Krol wrote:
Hello,
I would like to implement typical
the copy can be a dummy non-db-aware - if that is ok in your case
there's yet another option; u can just go all over the original
object, and on cancel do a rollback, and restore all changed stuff
back by hand (eventualy looking at object-state's history). But this
assumes short
one2many are the tricky ones - there's no copy as semantics,
there's move.
Say again? I can't (shallow) copy one-to-many object to another? Or
do you mean: I can't copy it to another object, modify it and then
copy it back?
shallow?
if A points to B1, copying B1 to B2 is ok, but u lose
as the SQl is literal, u have to apply that advice by hand:
SELECT crfItem.idCrf, class.name as clsname, attribute.name as
attrname ...
or something of sorts
On Monday 27 April 2009 19:00:24 Mauro wrote:
Dear group,
I'm having the following issue with Ambiguous column name, in
this
this direct yourmodels.DateType replacement would work if u had that in some
separate file, and all your models imported from that one. But, as there's
probably lots of other code and the import DateTime is probably everywhere, i
dont think u know which DateTime's to be replaced and which not.
and what is the query that goes plop? and whereabouts in the code?
u can use sys.setrecursionlimit( x) to eventualy move the threshold
down and make it die in other occasions too.
On Thursday 23 April 2009 18:55:11 Jonathan Vanasco wrote:
It starts with the code below, and the last two lines
On Tuesday 14 April 2009 16:56:41 Dusty Phillips wrote:
On Apr 13, 5:16 pm, a...@svilendobrev.com wrote:
mapper(Document, documents, properties={
'document_id': documents.c.id, # document_id ORM property
In the past, I have successfully mapped these properties using
synonym,
On Tuesday 14 April 2009 17:50:06 Dusty Phillips wrote:
On Apr 14, 10:33 am, a...@svilendobrev.com wrote:
On Tuesday 14 April 2009 16:56:41 Dusty Phillips wrote:
On Apr 13, 5:16 pm, a...@svilendobrev.com wrote:
mapper(Document, documents, properties={
'document_id':
Is there a way of telling if a table is inherited from another
table and which tables it inherits from in the Metadata?
inheritance is not really sql notion... so
a) look at the mapper.inherits (towards root) and/or
mapper.polymorphic_itereator() (towards leafs)
b) see if table's primary
i would bundle them into one... but would probably split on another
level. adding items to a user may well be posessions... so it
depends. That might well be a model of User with related stuff, which
is mapped to database in another way (one2many or Relator object/m2m
or whatever), and is
On Tuesday 14 April 2009 00:13:10 Jarrod Chesney wrote:
I'll look into a) do the mappers pick up foreign key constraints
and the polymorphic/inherited details from the metadata when their
created or do you have to specify them?
both, if ambigious u have to specify manualy.
dunno about the
mapper(Document, documents, properties={
'document_id': documents.c.id, # document_id ORM property
In the past, I have successfully mapped these properties using
synonym, but this time I'm confused because I'm not sure how to
define the synonym to a different column name. How do I
that's what i have in bitemporal queries.
u need a groupby and subquery/ies.
something along
subs = select(
[C.id.label('cid'), C.d_id.label('did'),
func.max(C.value).label('cvalue')]
).group_by( C.id )
giving the max cid/cvalues, and then somehow join Ds with that.
D.query(
On Monday 06 April 2009 18:26:06 Marcin Krol wrote:
Hello everyone,
I've got this query:
selectexpr = session.query(Host, Architecture, OS_Kind, OS_version,
Virtualization, Project, Reservation)
...
selectexpr = selectexpr.filter(or_(Host.earliest_reservation_id ==
None,
well... the thing is an AST of a very simple language - python-like
expressions (and that is not SQL! e.g. a.b.c == x.y.z
whateverelse). u can do with that AST whatever u want - save/load or
translate into something else, that is, another grammar.
u can build a gui builder/editor over the
for example see
copyall.py and copydata.py in
http://dbcook.svn.sourceforge.net/viewvc/dbcook/trunk/dbcook/misc/metadata/
On Thursday 02 April 2009 18:24:07 Maxim Khitrov wrote:
On Tue, Mar 31, 2009 at 4:20 PM, Yassen Damyanov
yassen@gmail.com wrote:
On Mar 31, 2009, Maxim Khitrov
if the m2m is implicit, u can use it as plain relation for joins etc;
except that .has becomes .any and == becomes .contains
see class RelComparator in
http://dbcook.svn.sourceforge.net/viewvc/dbcook/trunk/dbcook/usage/query.py
which i use to make the relation ops look same for m2m and one2m
i have similar thing, but by keeping an expression in my own terms and
rendering into different things, like text, SQL, SA-expresion, etc.
u define what is a variable, const, functor, overload all the
operators, etc etc; then have a visitor that walks and translates
(interprets) it into
u have MapperExtensions, per class, and u have SessionExtension, per
session. Both exhibit various events, in different life-span points.
i think there are some decorators for declarative...
On Wednesday 01 April 2009 19:26:35 Laurent Rahuel wrote:
Hi,
I'm currently trying to port a Django
you can use echo=True to metadata and/or logging to some extent.
there was also some recipe about how to print some query's actual sql
without issuing it, see recipes section at the site.
but i'm not sure u can really do all you want without having a
responding DB-api (which will at some point
see sqlsoup and/or metadata( reflect=True)
I'm new to SQLAlchemy. I am trying to use Pylons to expose an
existing database in a browser. All the introductory material
assumes I am going to create the database from python object
definitions, but I want to create the python object definitions
ah. when u don't have an explicit spec, the testcases are the real
spec. so make sure u really cover all them funny cases (-:
i had the default_values problem too, and to solve it i have split the
attr.access into two layers: one that sits below SA (as a fake dict),
and one thin that sits on
let me think about it.
as i see it u want to have runtime-invented data-only extensions to
some object - or is it data + some algo about it? would the algos be
new and reside in the new thing or they're just there and used?
imo this should be done via joins ala pyprotocols; inheritance is more
On Monday 23 March 2009 23:51:26 Christiaan Putter wrote:
Hi,
You're quite right, the join was the tricky bit at first.
...
The 'dynamically' added classes look something like this:
class SMAFields(SecurityFields):
sma10 = Float(sqldb=True)
def _get_sma10(self):
good on yer!
one thing that i sorta failed is making a clean set of tests for this.
if u aren't too far in the usage, save some major future headaches and
do yourself a favour, make such test set. All the things u've tried
has to be (simple) testcases - it will be the _spec_ of how the thing
On Sunday 22 March 2009 21:17:15 Christiaan Putter wrote:
Hi Svilen,
Setting up tests is a very good idea, I'll start on some unit
testing immediately. Definitely the best way to insure behaviour
remains constant as you're working on the implementation, was just
to lazy to do so up till
def search( self, **kw ):
by_where_clause = {}
for k,v in kw.items():
by_where_clause[ k ] = v
i guess u want to do query.filter_by(**by_where_clause) after that?
it's just a syntax sugar over .filter(). so
by_where_clause = []
for k,v in kw.items():
On Wednesday 18 March 2009 22:31:37 bard stéphane wrote:
is there an easy way to represent an interval tree table in
sqlAlchemy Interval Tree is very common way to represent tree.
with right, left, level indices, node, leaf (left - right = 1) ?
FIY see this thread with various tree
or_( *list_of..)
On Friday 06 March 2009 20:30:08 Tomasz Nazar wrote:
Hi there,
I have small issue and don't know how to solve ..
I need to have this kind of query:
q = dbsession().query(User).
options(eagerload_all('lang_pairs.lang_a'),
eagerload_all('lang_pairs.lang_a')).
as i see u have normal mapping for the Connection, and still use it as
secondary table; once i did use such (semi-legal?:) thing but the relation
was readonly.
try not giving secondary* args ?
On Thursday 05 March 2009 18:37, Kevin Dangoor wrote:
I have a many-to-many mapping that joins
u mean, the Bar is an association table of Foo to Foo?
u have to use secondary_table and/or secondary_join in the relation
setup. And probably specify remote_side or it may not know which Foo
is what.
On Wednesday 25 February 2009 03:39:20 Stef wrote:
Hello Everyone,
First of all, kudos
thequery().with_polymorphic( list of classes ) ?
On Wednesday 25 February 2009 15:43:54 Vladimir Iliev wrote:
hi,
how can i filter dynamic relation's query to instances of a given
class, including the subclasses ?
i tried something like
these are two general patterns, observer/listener and undo/redo
(command-pattern), which have nothing to do with DB.
i dont know about 2) DB-observers which would react on somebody else
changing the DB, AFAIK that is possible on certain servers only, but
the rest should be done independly on
what u mean by working?
if the object's __init__ is not called when loaded from db (like
pickle) - see docs for other hooks.
http://www.sqlalchemy.org/docs/05/mappers.html#constructors-and-object-initialization
e.g. the @orm.reconstructor decorator
On Saturday 21 February 2009 10:28:23
put it as text, it will be eval()'uated later
On Monday 16 February 2009 10:57:11 一首诗 wrote:
I tried to write :
#--
-- class User(Base):
__tablename__ = 'users'
id = Column(Integer, primary_key=True)
thats diff. thing, see self-ref. relations
http://www.sqlalchemy.org/docs/05/mappers.html#adjacency-list-relationships
On Monday 16 February 2009 11:18:59 一首诗 wrote:
Like this ?
---
- class User(Base):
I know how to query the database, and to add a new database entry.
But I really wanna know where my helper code goes. My idea is that
there is a function addCustomer() in the Customer class, but I
tried this out and it didnt work. Any suggestions or examples how
to proceed?
if in the class,
use one decl-base for all?
On Saturday 14 February 2009 18:30:14 dasacc22 wrote:
Hi,
Say I have two different files that I import that establish tables
via declarative_base, so
import a, b
where there exists a.Group and b.User and then I create my engine
engine = create_engine(...)
put the decl-base only in separate file, and import it in all usages?
On Saturday 14 February 2009 19:08:58 dasacc22 wrote:
I dont know how I can do that. Right now my a.py and b.py declare
their own declarative_base that get subclassed by my table
definations. The main goal here is that a is
look up the group, there was once or twice a discussion on directory
structure
On Saturday 14 February 2009 19:28:37 dasacc22 wrote:
I guess so, I originally gave that idea a pass b/c of the folder
structure as the import would have to come from ../../ which means
i would have had to modify
ah, it has to be other way around
unit = session.query(Unit).filter(Unit.id==3).first()
rec = sess.query( Record).filter( Record.theunit == unit)...
where theuint is the backref of Unit.records.
see
http://www.sqlalchemy.org/docs/05/ormtutorial.html#common-relation-operators
or just wait for
On Friday 13 February 2009 11:02:13 Chris Withers wrote:
a...@svilendobrev.com wrote:
rec = sess.query( Record).filter( Record.theunit == unit)...
Is this as nice as I can get it or is their a slicker solution?
this might work too
rec = sess.query( Record).filter_by( theunit = unit)...
On Friday 13 February 2009 11:07:29 koranthala wrote:
Hi,
I am working on a Python application which does approximately
1000 updates at a time every 3 seconds in a Sqlite File Database
using SqlAlchemy. On timing it in a 2GHz machine, I found that it
is taking ~1.01 seconds to do the
The inserts I do is as follows:
BEGIN:
2009-02-13 14:34:40,703 INFO
sqlalchemy.engine.base.Engine.0x..10 UPDATE data SET status=?
WHERE data.index = ?
2009-02-13 14:34:40,703 INFO
sqlalchemy.engine.base.Engine.0x..10 ['True', 68762]
...
(1000)
...
COMMIT
i guess s.execute(stmt, params=dict(codeword=codeword) )
}On Friday 13 February 2009 18:42:26 Max Ischenko wrote:
I get an error when I'm trying tu run this:
stmt = text(select * from salary_data_new
where codeword=:codeword union
select * from
session.query(Child).filter( Child.type != 'childtypenamehere') ?
On Friday 13 February 2009 19:05:52 GustaV wrote:
Hello!
In a configuration looking like this:
class Parent:
pass
class Child(Parent):
pass
class ChildChild(Child):
pass
I would like to query the Childs and
ah sorry, singleinh, ignore my post
On Friday 13 February 2009 19:05:52 GustaV wrote:
Hello!
In a configuration looking like this:
class Parent:
pass
class Child(Parent):
pass
class ChildChild(Child):
pass
I would like to query the Childs and all classes that inherits it
is this joined inheritance or concrete?
IMO if Product inherits Node, they has to have same PK?
On Thursday 12 February 2009 23:56:12 Bruce van der Kooij wrote:
Many thanks Michael, your instructions were spot-on. In the process
of following your instructions I decided to switch from using
use the relation as a join path, and then whatever
filtering/ordering
try:
unit.join(Unit.records).order_by(Record.date.desc()).first()
or
unit.join('records').order_by(Record.date.desc()).first()
--~--~-~--~~~---~--~~
You received this message because
On Wednesday 11 February 2009 23:07:29 Angri wrote:
Michael, I see you dont like the ability to flush only specific
objects
how about a group of objects? say whole island in the dependency
graph?
--~--~-~--~~~---~--~~
You received this message because you are
any2any: see files in
http://dbcook.svn.sourceforge.net/viewvc/dbcook/trunk/dbcook/misc/metadata/
copyall, copydata
i haven't touched it for a while, see if still works.
On Thursday 12 February 2009 01:05:47 Piotr Ozarowski wrote:
Hi,
Here's what I wrote to create PostgreSQL's data backup in
object-query or plain query?
- objects are .. whatever class it is;
print the i.__dict__ or str(i) or whatever
- plain-sql-query ones are RowProxy, they
have i.keys() i.items() i.values()
On Tuesday 10 February 2009 21:27:09 Lukasz Szybalski wrote:
Hello,
Could somebody tell me how
afaiknow these traits are like my own static_types, i.e. descriptors
holding metadata and applying it to attribute access.
i have been combining SA with static_type for more than 2 years now,
since SA 3.0.
The approach i did in the beginning was to replace the object's
__dict__ by something
so u have a member, pointing to member_profile, pointing to all its
attributes into separate tables?
one way IMO is to map all other 50 tables into simple classes, then
have member profile reference each of them, i.e. relation( ..
uselist=False). Then, if u need all of them at once, request a
only the class owner of the identity sets it, internaly.
i your case Input has no separate identity, but this does not give u right to
set identity manualy. if it had, a=Input( whatver) would set that.
or that's how i get it.
On Monday 02 February 2009 04:15, MikeCo wrote:
I have a single
there has been a number of apps announced that do html forms from SA
schema - look up the list.
afaik Column() takes an 'info=...' dict with whatever stuff u put in
it. Same goes for Table()
I have been trying to figure out a way to easily create HTML forms
and some other stuff from my
that sess.fulsh() in the middle there... if u move it up/down/out,
will behaviour change? e.g. if u print the things in itemB.purchase
just _After that flush - is 80 there or not?
On Thursday 29 January 2009 20:19:59 Werner F. Bruhin wrote:
Michael,
I run the following script and initially
typo - 81087 and 18087?
maybe run with echo=True and see what goes on?
does the testfile use same engine/.. setup as below?
On Wednesday 28 January 2009 19:21:54 Gloria W wrote:
This is a strange problem. I'd appreciate any assistance.
I have a class set up using the declarative_bass model,
i have recently stumbled on similar - the rowproxy's __hash__ was
missing. so i have to tuple() them before usage.
Then there was Mike's question, what should the RowProxy emulate?
the tuple of the row, or something else?
Today I attempted to serialize the return value of the form
result =
theoretically - this might make a+b+c+d look like a+(b+(c+d)). Which
isn't that bad, except that SA does not level-indent parenthesised
expressions, and the sql is going to look like lisp program... but
yes, u're right, SA relies on some python precedence and
associativity being same as SQL
On Wednesday 28 January 2009 01:34:30 Michael Bayer wrote:
On Jan 27, 2009, at 6:28 PM, a...@svilendobrev.com wrote:
i have recently stumbled on similar - the rowproxy's __hash__ was
missing. so i have to tuple() them before usage.
that doesnt strike me as a similar issue. we should
g'day
i'm asking out of sheer curiosity, although it may turn more serious.
is there any known work about linking somehow SQLAlchmey and
gogole-stuff?
i looked at the google api/lang and they seem somewhat similar to
sqlalchemy's (well, like rdf-Alchemy is).
i might bite the idea of having
use key=... argument of Column
On Friday 23 January 2009 04:52:07 Ikuta wrote:
And I got another question now.
The Column name has space like below.
user = Table('tbl_user', metadata,\
Column('name', VARCHAR(20)),\
Column('phone number', VARCHAR(20)))
1.
which join are u mentioning? and which result u want to save?
the query itself or the objects it returns after execution?
q = query(Line).join( Fiber, ...condition ).filter()
if ... return q.filter( 123...)
else: return q.filter( 456...)
building that q is not expensive;
saving it is fine
mmh, cant really grasp what u want to do.
what are Line.* attributes?
.filter does and(), so this can be simplified:
q = query(Line).filter( models.Line.LineDiscarded == LineDiscarded )
if ...:
return q.filter( sites...)
else:
return q.filter( sites...)
On Monday 19 January 2009 23:28:55
u want to simulate what sqlalchemy is doing?
i'd put some layer facading between the app and the sqlalchemy, then
replace sqlalchemy with something else. that'll need a) test that
assures the two facades behave equivalent, and b) the app tests
should not rely on any partcular
u can look at my posts on the topic and all related too (-:)
search for recursive/recursion/graph/sets
in short:
- storage:
- store graph in pure form (nodes/edges only) - easy to
maintain/update, very difficult to query
- store some preprocessed (cached) denormalized form (all paths
read various threads about copy/deep-copy.
in any case u'll have to do the hierarchy-copying yourself - even if
moving one object (alone) from session to session succeeds somehow.
On Saturday 17 January 2009 14:47:41 Darren Govoni wrote:
After some further experimenting with this, it seems I
Yes, i'd like to do that, but because of the code injection seems
to carry state from the old session, the new session has trouble
with even the copy.
then, separate the issues:
a) make a working deep copy within same session (this is not at all
trivial, except for very simple schemas)
b)
try func.yourfuncname(..) ?
On Thursday 15 January 2009 03:18:51 clb wrote:
Hi, I have been scouring the sqlalchemy 0.5 documentation and can't
seem to find information on how to execute UDFs. I am dealing with
the following scenario:
1. I create a UDF (for example, get_fav_id, which
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