Thank you Michael ,
you only need a single relation() + backref(), books-stock.
did you mean like this ?
class Stock(declarative_base):
__tablename__ = 'tbl_stock'
pass
class Book(declarative_base):
__tablename__ = 'tbl_books'
-Original Message-
From: sqlalchemy@googlegroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of
---[EMAIL PROTECTED]@il06exr02.mot.com
Sent: 18 November 2008 10:04
To: sqlalchemy
Subject: [sqlalchemy] Re: Info needed regarding the use of cascade
Thank you Michael ,
you
Hi,
I have a code like this:
if self.session.dirty:
for dirty in self.session.dirty:
if self.session.is_modified(dirty):
return True
if self.session.new:
for obj in self.session.new:
if self.session.is_modified(obj):
return True
I realized that
is_modified() shouldn't trigger a flush. is that with rc4 ?
sandro dentella wrote:
Hi,
I have a code like this:
if self.session.dirty:
for dirty in self.session.dirty:
if self.session.is_modified(dirty):
return True
if self.session.new:
for obj in
On Tue, Nov 18, 2008 at 10:27:32AM -0500, Michael Bayer wrote:
is_modified() shouldn't trigger a flush. is that with rc4 ?
no it was svn rev. 4935. It's still the same with rev. 5311.
I verified again: autoflush=False, just works. Autoflush=True
shows that
## here session.new is not empty
Hello All,
I am using Elixir 0.6.1 over SQLA 0.5rc2. Consider the below :
from elixir import *
class A(Entity):
*... name = Field(String(40))*
...
class B(A):
*... address = Field(String(40))*
...
engine = sqlite:///c:\\temp\\2.sqlite
metadata.bind = engine
setup_all(True)
a =
is_modified() has a flag passive which when set to True, disables lazy
loaders from executing. As it turns out the flag was also not hooked up
so you'd have to use the latest trunk to get this.
the reason it wants to lazily load things is because the modified
calculation compares the current
I have a project where I need to monitor the changes to a record -
when using after_update, is it possible to see what the data was
before the update?
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On Mon, 17 Nov 2008, Faheem Mitha wrote:
Hi,
I've written a session transcript to init db tables and add objects
(well, rows) to the tables. The issue I'm currently facing is how to
make the creating and populating the tables section of the script a
no-op when the objects exist. If
On Tue, Nov 18, 2008 at 11:31:38AM -0500, Michael Bayer wrote:
is_modified() has a flag passive which when set to True, disables lazy
loaders from executing. As it turns out the flag was also not hooked up
so you'd have to use the latest trunk to get this.
the reason it wants to lazily
pysqlite always returns Python unicode objects and this is outside of the
realm of SQLAlchemy. I'm not familiar with a pysqlite option to change
this but you should consult their site for any options related to it.
Harish Vishwanath wrote:
Hello All,
I am using Elixir 0.6.1 over SQLA
the API to retrieve history for an individual attribute looks like:
from sqlalchemy.orm import attributes
a, u, d = attributes.get_history(Class.attribute, obj)
where a, u, d are lists of added items, unchanged items, and deleted
items, respectively. For a scalar attributes, a, u, d are
my approach to this is to fetch all objects that look like my objects
and then add the ones that are missing.
e.g.
q = query(A).filter( A.name.in_( allnames_that_should_be) )
missingnames = set( allnames_that_should_be) - set( a.name for a in q)
for name in missingnames: ...
probably would be
hi
so i have list of languages (suffixes)
en
de
pl
ru
etc...
now i have my article_table, when normaly i would have columns:
id, title, content
but now i want to have:
id, title_en, title_de, title_pl,
title_ru,,content_en,..,content_ru
how can i create table definition dynamicly
technically you'd say query(X).join(X.all_A.as_type(C)) but I don't know
offhand if that use case has been implemented for join() as of yet. you
can of course just say query(X).join((A, A.id==x.aid), (C, C.id==A.id))
assuming you're on joined table inheritance. all bets are off for
concrete.
hi
i have A, B, C,... inheritance, where A points to some X.
how i query all Xs which are pointed by, say Cs ?
if i put a backref on the reference,
query(X).join( X.all_A) will give me As Bs Cs everything...
or should that go down to joins?
ciao
svil
query(X).join(X.all_A.of_type(C)) works but produces a subselect
(select all-them-columns ...) which is huge/hard to read.
i found that query(X).filter( X.all_A.of_type(C).any()) works too, and
the subselect is shorter (select 1 ...).
hmm, might be useful to somehow differ between a join that
zipcode_meta_join_subquery = session.query(us_zipcode_table.c.city_id,
us_zipcode_table.c.zipcode_population,
us_zipcode_table.c.average_house_value).group_by(us_zipc
ode_table.c.city_id).subquery()
mapper(USCity, us_city_table, properties={
'state':relation(USState,
All I need to be able to do is the following. (I don't need, can't
use, and/or don't want ORM)
query = 'SELECT col FROM table where col = :col'
params = {'col':1} # and/or params = [{'col':1},{'col':2}]
OR
query = 'INSERT INTO table(col1,col2) VALUES(:col1,col2)'
params = {'col1':1,'col2':2} #
Hi,
On Tue, Nov 18, 2008 at 9:39 PM, TheShadow [EMAIL PROTECTED] wrote:
All I need to be able to do is the following. (I don't need, can't
use, and/or don't want ORM)
query = 'SELECT col FROM table where col = :col'
params = {'col':1} # and/or params = [{'col':1},{'col':2}]
OR
query =
joining to a subquery is better accomplished outside of relation()
using query, such as query(USZipCode).join((subquery,
subquery.c.col==USZipCode.somecol)).
Now you want it as an attribute on your class. Do it like this:
class USCity(object):
...
@property
def
Providing great utility with no ORM whatsoever is one of our core
values. That's why if you dont import sqlalchemy.orm, theres no ORM.
A full overview of SQLAlchemy components is at:
http://www.sqlalchemy.org/docs/05/intro.html
On Nov 18, 2008, at 9:39 PM, TheShadow wrote:
All I need
A way to normalize this:
article_table:
id
title_table:
article_id = primary key, also = foreign key to article_table.id
language
title
content_table:
article_id = primary key, also = foreign key to article_table.id
language
content
mapper(Article, article_table, properties={
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