Hi,
* I have a table A with __mapper_args__ = {'polymorphic_on': type}
* Table B C and D are inherited from A with polymorphic_identity
type_b, type_c and type_d respectively
I want to change the value of polymorphic_identity for an instance of
class B, how do it ??
I tried like this, but
Hi,
I also tried like this, But not working
instance_of_B.__mapper_args__[polymorphic_identity] = type_c
DBSession.add(instance_of_B)
transaction.commit();
and
instance_of_B.__mapper__.polymorphic_identity = type_c
DBSession.add(instance_of_B)
transaction.commit();
Thanks,
--
You received
On 05/06/2013 13:46, sajuptpm wrote:
Hi,
I also tried like this, But not working
instance_of_B.__mapper_args__[polymorphic_identity] = type_c
DBSession.add(instance_of_B)
transaction.commit();
and
instance_of_B.__mapper__.polymorphic_identity = type_c
DBSession.add(instance_of_B)
If I have several mapped classes on which I want to have defined some
shared set of methods, e.g., ._todict(), how can I accomplish this (without
multiple inheritance or defining them manually in each class)?
I tried making the classes inherit from a shared parent class, but I
receive errors
On Thu, May 2, 2013 at 3:34 PM, Claudio Freire klaussfre...@gmail.com wrote:
Without the C extension:
ncalls tottime percall cumtime percall filename:lineno(function)
20811734 27.8290.000 27.8550.000 attributes.py:171(__get__)
7631984 13.5320.000 31.8510.000
On Mon, May 6, 2013 at 1:10 PM, Claudio Freire klaussfre...@gmail.com wrote:
On Thu, May 2, 2013 at 3:34 PM, Claudio Freire klaussfre...@gmail.com wrote:
Without the C extension:
ncalls tottime percall cumtime percall filename:lineno(function)
20811734 27.8290.000 27.855
On May 6, 2013, at 6:30 AM, sajuptpm sajup...@gmail.com wrote:
Hi,
* I have a table A with __mapper_args__ = {'polymorphic_on': type}
* Table B C and D are inherited from A with polymorphic_identity
type_b, type_c and type_d respectively
I want to change the value of
On May 6, 2013, at 11:55 AM, Michael Nachtigal
michael.nachti...@catalinamarketing.com wrote:
If I have several mapped classes on which I want to have defined some shared
set of methods, e.g., ._todict(), how can I accomplish this (without multiple
inheritance or defining them manually in
that's a lot of effort there. How confident are you that memory and references
are handled correctly in the .c code? That's a lot of C code, and it took
years for us to iron out all the memory leaks in the existing C extensions that
we had - the original author eventually stopped maintaining
Thanks, your first solution was just what I needed!
From: sqlalchemy@googlegroups.com [sqlalchemy@googlegroups.com] on behalf of
Michael Bayer [mike...@zzzcomputing.com]
Sent: Monday, May 06, 2013 12:41 PM
To: sqlalchemy@googlegroups.com
Subject: Re: [sqlalchemy]
Anyone who can help out with sqlalchemy related problem
I have a app which using sqlalchemy as the orm. As the app is one in
transition some of the update query's run through a session.execute .
However I need to create a trigger of some kind . I am trying to use
MapperExtensions but it seems
On Mon, May 6, 2013 at 1:50 PM, Michael Bayer mike...@zzzcomputing.com wrote:
that's a lot of effort there. How confident are you that memory and
references are handled correctly in the .c code?
Quite. It's not my first C extension. But, truly, C is complex.
That's a lot of C code, and it
did you generate your code here with pyrex?If you want to jump in and
rework our C extensions to be pyrex based and everything works out just as well
or better than before, it'll be a great 0.9/1.0 feature.I've got a bit of
experience with cython already as I've worked on lxml a bit,
On Mon, May 6, 2013 at 2:31 PM, Michael Bayer mike...@zzzcomputing.com wrote:
did you generate your code here with pyrex?If you want to jump in and
rework our C extensions to be pyrex based and everything works out just as
well or better than before, it'll be a great 0.9/1.0 feature.
I'm using a declarative mapping in combination with reflection, and I'm
providing some custom renaming of column names in the mapped class, as
demonstrated below.
temp_user = self.metadata.tables['user_t']
class MappedUser(Base):
__table__ = temp_user
user_number = temp_user.c.user_id
On Mon, May 6, 2013 at 2:31 PM, Michael Bayer mike...@zzzcomputing.com wrote:
did you generate your code here with pyrex?
Oh, sorry, I didn't answer this.
No. I wrote it by hand.
Pyrex-generated code is inscrutable, not that there's any need to
inscrute. But really, when using pyrex, the C
Hi, all.
In Postgresql I have a CMS entry model with a tag column varchar(20)[]. I
want to do a query so a row with any of the tags will be returned. I know
overlap is the method to use but I can't get the casting done correctly.
Right now I am trying (and a lot of searching revealed similar
not sure what you mean by descriptor here. Here's a test. show me how to
reproduce the broken behavior:
from sqlalchemy import *
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
t = Table('t', Base.metadata,
Column('user_id', Integer,
I was using descriptor as best I could to match its meaning as I understood
it in SQLAlchemy
(http://docs.sqlalchemy.org/ru/latest/glossary.html#term-descriptor), but it
may be wrong. Here's how I could somewhat reproduce the error using your code
(by the way, which is more appropriate for
right that won't work. if you want that pattern, use synonym():
http://docs.sqlalchemy.org/en/rel_0_8/orm/mapper_config.html#id2
usually a hybrid is what's used here but if you really want just the alternate
name, synonym will do it.
short code examples inline are just fine.
On May 6,
Hi,
I have 2 tables: Members GroupMembers
orm.mapper(Member, meta.Members)
orm.mapper(GroupMember, meta.GroupMembers
properties={
'member': orm.relation(Member,
primaryjoin=meta.GroupMembers.c.memberID == meta.Members.c.id,
lazy=False)
}
)
I want to do something like
query
Here's a ticket where we can keep talking about this:
http://www.sqlalchemy.org/trac/ticket/2720
(here's the py3k ticket also: http://www.sqlalchemy.org/trac/ticket/2161)
note that SQLAlchemy 0.9 will no longer use 2to3, and will by Python 2.6-3.3
in place.The enhancement here is targeted
On May 6, 2013, at 3:21 PM, V'Raj Kanwade viraj.kanw...@gmail.com wrote:
Hi,
I have 2 tables: Members GroupMembers
orm.mapper(Member, meta.Members)
orm.mapper(GroupMember, meta.GroupMembers
properties={
'member': orm.relation(Member,
Thanks Michael
On Monday, 6 May 2013 12:29:07 UTC-7, Michael Bayer wrote:
On May 6, 2013, at 3:21 PM, V'Raj Kanwade viraj@gmail.comjavascript:
wrote:
Hi,
I have 2 tables: Members GroupMembers
orm.mapper(Member, meta.Members)
orm.mapper(GroupMember, meta.GroupMembers
On Mon, May 6, 2013 at 4:27 PM, Michael Bayer mike...@zzzcomputing.com wrote:
as for the __slots__ thing, that's a separate issue.if your patch doesn't
break tests we can set that for 0.9 as well, I doubt anyone is subclassing
InstanceState, though I'd want to see what the speedup is with
Hi, I'm just pulling this up because it's a little anoying. Everytime I
start my application, this warning shows:
*[...]/lib/python2.7/site-packages/sqlalchemy/engine/default.py:471:
SAWarning: Unicode type received non-unicode bind param value.**
** processors[key](compiled_params[key])*
I
this happens when you do this:
class SomeClass(Base):
# ...
some_col = Column(Unicode(50))
s = SomeClass(somestring='some value')
and then when you commit s to the database, the bytestring is detected and
the warning emitted. Note 'some value' is a Python bytestring, not a Unicode
Thanks Mike.
I know I must use unicode, and, in a matter of fact, I do respect the
first item of your list. That's why I asked here :)
I'll try items 2 and 5 (which seems more appropriate, since my
application runs only on Postgres).
Best regards,
Richard.
On 05/06/2013 05:50 PM, Michael
I was looking at using a UUID as primary key for a table. Using the
backend-agnostic GUID type from
http://docs.sqlalchemy.org/en/rel_0_8/core/types.html#backend-agnostic-guid-type
I get strange behaviour though. I whipped up a simple test case:
class Data(BaseObject):
__tablename__ =
Hi All,
using 8.1
class Company(Base):
__tablename__ = 'Company'
Id = Column(Integer, primary_key=True)
class ProductClass(Base):
__tablename__ = 'ProductClass'
Id = Column(Integer, primary_key=True)
Company_Id = Column(Integer, ForeignKey(Company.Id,
For reference I have attached a complete test case including a copy of the GUID
code from the documentation.
On May 6, 2013, at 23:22, Wichert Akkerman wich...@wiggy.net wrote:
I was looking at using a UUID as primary key for a table. Using the
backend-agnostic GUID type from
well what's happening here is fairly simple, the mapper and ORM don't know
anything about the conversion from string to UUID. So when you pass it
Data(uuid=some string), it persists it, passing it off to the Core which
converts the UUID, but because you've supplied the primary key, it then
this depends on the database you're using, and I'd google around for stack
overflow information on how to implement unique values with NULLs allowed. For
example here is postgresql:
http://dba.stackexchange.com/questions/9759/postgresql-multi-column-unique-constraint-and-null-values
and
On 05/03/2013 04:18 PM, Simon King wrote:
On Thu, May 2, 2013 at 11:43 PM, Paradox para...@pobox.com wrote:
CREATE TABLE user (lname string, fname string, email string,
unique(lname, fname) ON CONFLICT REPLACE);
This will allow me to add multiple rows with the same lname as long as
the fnames
I am executing a query with contains_eager to load objects and their
related objects from a different table. I would like to control the order
of the related objects within each InstrumentedList. I had hoped this could
be done through the ordering in the query.
For example, with a query like:
I was curious if you might elaborate on the issues with using a GUID as the
primary key?
I use them extensively in my professional database projects where I have
multiple remote geographic sites that might have key collisions. Actually
I haven't used a bigint serial PK in years and haven't
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