Hi,
I got no idea, whether this is possible with SA (version 0.6.4), but I
want to map multiple columns as one list into the resulting object.
I have the following code:
location_table = Table('loc_location', metadata,
Column('LOC_ID', Integer, primary_key=True),
Column('LOC_L1',
On 04/10/2010 13:16, Mark Erbaugh wrote:
If I were doing this in SQL, I would to the first command as
SELECT count(*)
FROM period
WHERE period.cycle = ?
Why would you do this first?
Chris
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Hi All
I have what I hope is a very simple question;
Just started experimenting with joins, so I tried a very basic test and got
a fail that I don't understand. It appears that SA is creating bad SQL, but
I'm sure it's something I'm missing.. Here's what I did;
I have two tables. products
On 04/10/2010 22:53, Bryan wrote:
I'm having trouble converting this SQL into an ORM statement.
DATE_ADD(datecol, INTERVAL(1 - DAYOFWEEK(datecol)) DAY)
This is as far as I can get, which is basically nowhere. The second
argument to date_add requires literal strings INTERVAL and DAY,
but I
Hi All
Just my 2c;
The original question was why is SA doing the select before it does the
delete? and then the comment was added that he would have done a simple
count instead.. It appears that he was not aware that the DELETE could
return the count as well (indirectly) so in actual fact,
Warwick Prince wrote:
Hi All
I have what I hope is a very simple question;
Just started experimenting with joins, so I tried a very basic test
and got a fail that I don't understand. It appears that SA is
creating bad SQL, but I'm sure it's something I'm missing.. Here's
what I did;
Hi Simon
Thanks for that - I knew it was something wrong with the approach but simply
could not pick it!Back to the test bench for another go :-)
Cheers
Warwick
P.S. OK - I have to ask - when and how (why?) do I do the .join on the
query? ;-)
On 5 October 2010 19:41, King Simon-NFHD78
Warwick Prince wrote:
Hi Simon
Thanks for that - I knew it was something wrong with the approach but
simply could not pick it!Back to the test bench for another go :-)
Cheers
Warwick
P.S. OK - I have to ask - when and how (why?) do I do the .join on
the query? ;-)
In SQL,
Hi Simon
Thanks for your help. It's amazing what a tiny hint in the right direction
can do.. Between these emails, I've made a proof on concept, and am now
implementing the code in the real app. So easy when I'm not blocked by a
warped vision of what I'm doing.
Funny, looking back at the
Hi All,
I have also created a post for this question on StackOverflow:
http://stackoverflow.com/questions/3863508/joinedload-eager-loading-whole-sub-graphs-in-sqlalchemy
Let's say I have a Task object which can be dependent on other Tasks. Is
there a way to sensibly eager/joinedload all of a
On Oct 5, 2010, at 4:48 AM, Chris Withers wrote:
On 04/10/2010 13:16, Mark Erbaugh wrote:
If I were doing this in SQL, I would to the first command as
SELECT count(*)
FROM period
WHERE period.cycle = ?
Why would you do this first?
I wasn't sure why SA was issuing a select realperiod
Ah. To answer my own question, what I was actually after was an adjacency
list, of which there are examples to be found here, which I missed:
http://www.sqlalchemy.org/docs/05/mappers.html#adjacency-list-relationships
I believe this will do what I was after.
Sorry for the noise, and thanks
On Tue, Oct 5, 2010 at 1:58 AM, Chris Withers ch...@simplistix.co.uk wrote:
Are you looking for something database agnostic or something that just works
for MySQL?
If the latter, look at text:
http://www.sqlalchemy.org/docs/core/tutorial.html#using-text
If the former, then you'll want a
Hi All,
Start off with a base.py module:
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
Now, say we have a module, a.py:
from sqlalchemy import *
from base import Base
class Something(Base):
__tablename__ = 'foo'
id = Column('id', Integer,
On Oct 5, 2010, at 11:04 AM, Chris Withers wrote:
Hi All,
Start off with a base.py module:
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
Now, say we have a module, a.py:
from sqlalchemy import *
from base import Base
class Something(Base):
Hi Bryan,
the only tricky bit in your SQL is the dangling 'DAY', because there's
no operator to tie it to the rest. Otherwise you should be able to
write (schema.AppDcRpe2 is just a Table object I'm using as an
example):
q =
On 05/10/2010 16:10, Michael Bayer wrote:
I think an exception should be raised if a class name already exists in
_decl_class_registry when the assignment is made in _as_declarative.
yeah definitely, though in 0.6 it needs to be a warning to start since some
folks might be doing this
On Oct 5, 4:45 pm, Bryan Vicknair bryanv...@gmail.com wrote:
I'm fine with a MySQL-only solution. The text construct is always the
fallback,
but I'm wondering if there is a way that I can use the attributes of my
class
for the column name, instead of just a string. My column names
On Oct 5, 2010, at 12:37 PM, Chris Withers wrote:
On 05/10/2010 16:10, Michael Bayer wrote:
I think an exception should be raised if a class name already exists in
_decl_class_registry when the assignment is made in _as_declarative.
yeah definitely, though in 0.6 it needs to be a warning
Hi, I'm just learning to use sqlalchemy now (although I've had some
exposure to SQLObject and Django ORM, so not completely new to the
game).
I'd like to address a standard ORM issue - i.e. interfacing Python
Decimal objects with SQLite backend. It seems that sqlalchemy follows
the standard
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