Em Sex, 2008-01-11 às 08:54 +0200, [EMAIL PROTECTED] escreveu:
either put the correct polymorphic_on=resource.c.poly, or remove it
alltogether,
it comes from the inherited base-mapper.
Exactly, works fine leaving poly on resource and mapping all
polymorphic_on=resource.c.poly
cookbook
svilen wrote:
On Friday 11 January 2008 16:12:08 Alexandre Conrad wrote:
Channel - Playlist - Media
Channel - CatalogChannel(Catalog) - Media
(Media has a fk to Catalog, not CatalogChannel)
The only element I have, is playlist (instance of Playlist). At
this point, I need to find out the
On Friday 11 January 2008 16:12:08 Alexandre Conrad wrote:
svilen wrote:
Here is the syntax followed by the generated query:
query.filter(Catalog.c.id==CatalogChannel.c.id)
WHERE catalogs.id = catalogs.id
why u need such a query?
that's exactly what (inheritance) join does, and
Jonathan LaCour wrote:
I am attempting to model a doubly-linked list, as follows:
... seems to do the trick. I had tried using backref's earlier,
but it was failing because I was specifying a remote_side
keyword argument to the backref(), which was making it blow up
with cycle detection
On Jan 11, 2008 7:57 PM, Jonathan LaCour [EMAIL PROTECTED] wrote:
Jonathan LaCour wrote:
I am attempting to model a doubly-linked list, as follows:
... seems to do the trick. I had tried using backref's earlier,
but it was failing because I was specifying a remote_side
keyword
All,
I am attempting to model a doubly-linked list, as follows:
task_table = Table('task', metadata,
Column('id', Integer, primary_key=True),
Column('name', Unicode),
Column('next_task_id', Integer,
On Friday 11 January 2008 13:58:34 Alexandre Conrad wrote:
Hi,
playing with inheritance, I figured out that an inherited mapped
class passed to filter doesn't point to the correct table.
I have 2 classes, Catalog and CatalogChannel(Catalog).
Here is the syntax followed by the generated
On Friday 11 January 2008 17:03:06 Alexandre Conrad wrote:
svilen wrote:
On Friday 11 January 2008 16:12:08 Alexandre Conrad wrote:
Channel - Playlist - Media
Channel - CatalogChannel(Catalog) - Media
(Media has a fk to Catalog, not CatalogChannel)
The only element I have, is playlist
Hi,
playing with inheritance, I figured out that an inherited mapped class
passed to filter doesn't point to the correct table.
I have 2 classes, Catalog and CatalogChannel(Catalog).
Here is the syntax followed by the generated query:
query.filter(Catalog.c.id==CatalogChannel.c.id)
Jonathan LaCour wrote:
I am attempting to model a doubly-linked list, as follows:
Replying to myself:
task_table = Table('task', metadata,
Column('id', Integer, primary_key=True),
Column('name', Unicode),
Column('next_task_id', Integer, ForeignKey('task.id')),
On Jan 10, 2008, at 9:15 PM, deanH wrote:
Hello,
I am having a problem inserting an object into a MS SQL table that
contains a timestamp field (now) that is generated automatically -
sqlalchemy is defaulting this column to None and when it is generating
the SQL insert. Is there a way to
On Jan 11, 2008, at 10:03 AM, Alexandre Conrad wrote:
svilen wrote:
On Friday 11 January 2008 16:12:08 Alexandre Conrad wrote:
Channel - Playlist - Media
Channel - CatalogChannel(Catalog) - Media
(Media has a fk to Catalog, not CatalogChannel)
The only element I have, is playlist
All of the crazy mappings today are blowing my mind, so I'll point you
to an old unit test with a doubly linked list:
http://www.sqlalchemy.org/trac/browser/sqlalchemy/trunk/test/orm/inheritance/poly_linked_list.py
the above uses just a single foreign key (but we can still traverse bi-
svilen wrote:
Here is the syntax followed by the generated query:
query.filter(Catalog.c.id==CatalogChannel.c.id)
WHERE catalogs.id = catalogs.id
why u need such a query?
that's exactly what (inheritance) join does, and automaticaly -
just query( CatalogChannel).all() would give u
Michael Bayer wrote:
All of the crazy mappings today are blowing my mind, so I'll point
you to an old unit test with a doubly linked list:
Yeah, trust me, it was blowing my mind as well, so I elected not
to go this direction anyway. You're also correct that there isn't
_really_ a need to
On Jan 11, 2008, at 12:30 PM, Denis S. Otkidach wrote:
# Another program. We have to insure that object with id=1 exists in
DB and has
# certain properties.
obj2 = ModelObject(1, u'title2')
session.merge(obj2)
session.commit()
what that looks like to me is that you're attempting to
On Dec 28, 2007 6:25 PM, Michael Bayer [EMAIL PROTECTED] wrote:
On Dec 28, 2007, at 5:50 AM, Denis S. Otkidach wrote:
Sure, I can get an object from DB and copy data from new one. But
there is a lot of object types, so have to invent yet another meta
description for it (while it already
I think I understand what you trying to do
in fact polymorphic objects are load correctly in my test, I think it is
an approach to your case.
follow the code I used before to ask about polymorphic inheritance, note
to the Catalog class, this class have a resource list (catalog_id on
Resource),
Thanks for the responses guys. The PassiveDefault() parameter did
exactly what I wanted it to do - which was to exclude that column from
the generated insert query so that MS SQL could handle those on it's
own.
... now to figure out why I am getting an unsubscriptable object type
error from the
On Jan 11, 2008, at 4:37 PM, Dean Halford wrote:
Thanks for the responses guys. The PassiveDefault() parameter did
exactly what I wanted it to do - which was to exclude that column from
the generated insert query so that MS SQL could handle those on it's
own.
... now to figure out why I
MSSQL ID generation is limited to integer PKs of the IDENTITY type, and they
work fine in 0.4 series. That wiki page should be updated.
It's most likely a case of the Table not knowing that the PK should be an
auto-increment type. Are you defining the table via an SA Table()
definition, or trying
thanks micheal - the only reason we went with 3.11 was the following
statement on the wiki:
Currently (Aug 2007) the 0.4 branch has a number of problems with MS-
SQL.
http://www.sqlalchemy.org/trac/wiki/DatabaseNotes#MS-SQL
I checked the logs and it does have to do with the MS-SQL ID
generation,
its updated. Dean, try to get on 0.4 !
On Jan 11, 2008, at 5:45 PM, Rick Morrison wrote:
MSSQL ID generation is limited to integer PKs of the IDENTITY type,
and they work fine in 0.4 series. That wiki page should be updated.
It's most likely a case of the Table not knowing that the PK
What character set is the db-api driver using? Try:
engine.connect().connection.character_set_name()
If it's not utf8, you can configure the driver by adding 'charset=utf8'
to your database url.
I add charset='utf-8' to 'create_engine' function, but before send
data(from query) to mako
phasma wrote:
What character set is the db-api driver using? Try:
engine.connect().connection.character_set_name()
If it's not utf8, you can configure the driver by adding 'charset=utf8'
to your database url.
I add charset='utf-8' to 'create_engine' function, but before send
That's unfortunate because our database is built around MS GUIDs and
not integer PKs, but good to know.
I am just using pythoncom.CreateGuid() to generate the object ids
before insert and that is working great.
thanks for all the help
On Jan 11, 2:45 pm, Rick Morrison [EMAIL PROTECTED] wrote:
On 12 янв, 04:07, jason kirtland [EMAIL PROTECTED] wrote:
phasma wrote:
What character set is the db-api driver using? Try:
engine.connect().connection.character_set_name()
If it's not utf8, you can configure the driver by adding 'charset=utf8'
to your database url.
I add
My experience with GUID PKs is that they almost always cause more troubles
than they purport to solve, and 99% of the time a plain Integer PK will work
just fine instead. The two rare exceptions are with multi-database
synchronization (and even there integer PKs can work fine with an additional
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