Hi,
I currently have the following mix-in class construction (based on the
documentation
http://docs.sqlalchemy.org/en/latest/orm/extensions/declarative/mixins.html
)
Base = declarative_base()
class BaseCountry(object):
""" Managed through Kotti """
@declared_attr
def
Hi there,
I receive the following weird UnicodeDecodeError after copying our
production database into a
testing environment. On the production server everything is working fine,
on the testing server
I get this error. Both installation including OS are basically identically
(except SA 0.8.0b2
Problem seems to be related how I moved the database (pg_dump + pg_restore).
After moving the database files directory I can no longer reproduce this
error.
-aj
On Friday, April 19, 2013 8:36:58 AM UTC+2, Andreas Jung wrote:
Hi there,
I receive the following weird UnicodeDecodeError after
Using Postgres 9.1, SqlAlchemy 0.8.
I need to store information like
[
[10, 'liters', 'tea'],
[20, 'milliliters', 'salt'],
]
as one column into Postgres.
What is the best way to do this? Of course I use a second table with a 1:N
relationship
I am thinking about using the Postgres Array
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I am getting the following error after upgrading from post-0.5.2 version
(SVN) to 0.5.3:
==
ERROR: testToolLookupVisitedBy (tool.tests.test_tool_lookup.TestToolLookup)
-
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On 29.03.2009 2:44 Uhr, j...@robinlea.com wrote:
Hi,
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
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On 24.03.2009 23:01 Uhr, Alessandro Dentella wrote:
Hi,
is there a way to get the session an object belongs to?
I have been looking around and cannot find any function/way for that...
object_session(obj)
- -aj
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On 24.03.2009 13:45 Uhr, alex wrote:
Hello.
I need to get query from sqlalchemy in json format.
query like
query_name = session.query(model.Users);
How to format like
{{id:1,name:Alex},{id:2,name:Nick}.}
The result format does not
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On 19.03.2009 8:32 Uhr, Arthur Pemberton wrote:
2009/3/19 Andreas Jung li...@zopyx.com:
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On 19.03.2009 6:49 Uhr, Arthur Pemberton wrote:
SQLAlchemy needs a concept of Data Transfer Objects so
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On 19.03.2009 5:24 Uhr, 一首诗 wrote:
This is my ORM class definition:
#=
class User(Base):
__tablename__ = 'b_taa_user'
user_id = Column(Integer, primary_key=True, autoincrement=True,
nullable=False) # 用户ID
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On 19.03.2009 6:49 Uhr, Arthur Pemberton wrote:
SQLAlchemy needs a concept of Data Transfer Objects so that it can be
easily transmitted and reconstituted as necessary and everyone doesn't
have to reimplemented the idea themselves. There are
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This is covered by the decl. layer documentation (including examples):
- either use strings for the parameter
or
- you write outside the class scope
User.sons = relation()
- -aj
On 16.02.2009 9:57 Uhr, 一首诗 wrote:
I tried to write :
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The syntax is basically same. Look at the standard documentation and
examples for relation() and apply it to the decl layer.
- -aj
On 01.02.2009 16:17 Uhr, Eric Ongerth wrote:
Kevin, the default behavior is for relations to be represented by
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Hi there,
using SA 0.5.2/Postgres 7.4.22.
Reflecting an existing database gives me this:
(Pdb) c
/local/HRS2/Devel/junga/tb-dev/eggs/SQLAlchemy-0.5.2-py2.4.egg/sqlalchemy/engine/base.py:1265:
SAWarning: Skipped unsupported reflection of
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On 26.01.2009 6:23 Uhr, Jan Koprowski wrote:
Hi !
I get some query:
DELETE FROM passwordrequest WHERE requested_at = (NOW() - INTERVAL 1
DAY)
which delete all requests older then one day. How can I get this
effect in SQLAlchemy ?
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On 18.01.2009 16:32 Uhr, Victor Lin wrote:
Hi,
So I think that would be better to buffer data and flush them.
This is easily spoken the implementation pattern of SA: unit-of-work.
You might check the documentation.
- -aj
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Is it possible to define multiple mappers for one table?
Usecase: I have one big table (60 cols) and one big mapper class.
For some reporting I don't need only a small number of cols. For
performance reasons I would like to load the related rows
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On 13.01.2009 15:52 Uhr, Michael Bayer wrote:
On Jan 13, 2009, at 8:19 AM, Andreas Jung wrote:
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Is it possible to define multiple mappers for one table?
Usecase: I have one big table (60 cols
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On 11.01.2009 12:13 Uhr, Cito wrote:
I wonder why declarative_base() doesn't simply set __tablename__ to
the name of the class by default (maybe translating camelcase to
lowercase with underscores).
Please no implicit magic under the hood. You
On 02.01.2009 18:11 Uhr, Michael Bayer wrote:
On Jan 2, 2009, at 4:24 AM, Andreas Jung wrote:
Hi there,
running SA 0.5rc4, psycopg2 together with Postgres 7.4.22.
I am currently migrating a Zope application from SA 0.3 to SA 0.5.
While the migration worked for a bigger application I have
On 27.12.2008 11:06 Uhr, Jim Jones wrote:
Hi List,
I have this simple model (in declarative style):
class Item( Base ):
__tablename__ = 'items'
desc = Column( 'desc', UnicodeText(), nullable=False )
email = Column( 'email', UnicodeText(), nullable=False )
How can I
On 27.12.2008 3:06 Uhr, Eric Abrahamsen wrote:
Sorry for the very beginner question, but I haven't been able to find
a good discussion of this issue online (possibly because it's too
basic).
I'm using sqlalchemy as part of a basic web-based CRUD-style CMS. I've
got the Create, Read and
On 10.12.2008 20:36 Uhr, Michael Bayer wrote:
On Dec 10, 2008, at 2:27 PM, Andreas Jung wrote:
Hi there,
is there some more efficient way for dictifying a resultset other than
lst = list()
for row in session.query(...).all():
d = self.__dict__.copy()
for k in d.keys
On 19.12.2008 2:57 Uhr, Michael Bayer wrote:
On Dec 18, 2008, at 3:04 PM, Andreas Jung wrote:
On 10.12.2008 20:36 Uhr, Michael Bayer wrote:
On Dec 10, 2008, at 2:27 PM, Andreas Jung wrote:
Hi there,
is there some more efficient way for dictifying a resultset other
than
lst = list
), and the stack trace is specific to a
relation(), which you haven't illustrated in your setup.
On Dec 16, 2008, at 7:31 AM, Andreas Jung wrote:
Hi,
I have a fairly complex model using the declarative layer.
For a simple table 'fassung'
Toolbox2=# \d fassung
Hi,
I have a fairly complex model using the declarative layer.
For a simple table 'fassung'
Toolbox2=# \d fassung
Table public.fassung
Column| Type | Modifiers
Can the decl. layer be used to setup a self-referential mapper like
class Foo(Base):
__tablename__ = 'foo'
__table_args__ = {'autoload' : True}
children = relation(Foo, primaryjoin=Foo.parent_id==Foo.id)
parent = relation(Foo, primary_join=Foo.parent_id=Foo.id,
On 11.12.2008 11:10 Uhr, [EMAIL PROTECTED] wrote:
afaik, u can supply strings instead of real things everywhere in those
arguments.. they are eval()ed against some context at later time.
This works to some degree:
class Hierarchies(Base):
__tablename__ = 'hierarchies'
__table_args__
Hi there,
is there some more efficient way for dictifying a resultset other than
lst = list()
for row in session.query(...).all():
d = self.__dict__.copy()
for k in d.keys():
if k.startswith('_sa'):
del d[k]
lst.append(d)
Especially the loop of the keys
On 05.12.2008 17:10 Uhr, [EMAIL PROTECTED] wrote:
i'm asking about SA-related stuff, i know how to handle the python
side. how to lock relations, collections etc - how to make an
instance readonly?
and eventualy if it is poosible after that to unlock that instance at
some point - so lock all
I am getting the following error with SA 0.5.0rc4 and Postgres 8.1
while trying some integration work with SQLAlchemy and Plone (on top of
Zope). Any idea?
Andreas
get(): Storage RDBMSStorage ATDocument at front-page
ab23df631c18ea2c9ae7be8321f647dd
2008-11-23 15:13:39 ERROR root Exception
Oopps...I was using the wrong database...someone switched the port
numbers :-
Andreas
On 23.11.2008 15:17 Uhr, Andreas Jung wrote:
I am getting the following error with SA 0.5.0rc4 and Postgres 8.1
while trying some integration work with SQLAlchemy and Plone (on top of
Zope). Any idea
--On 15. Juli 2008 22:32:35 -0700 Fotinakis [EMAIL PROTECTED] wrote:
Hello SQLAlchemists,
What is (or what do you think is) the load that SQLAlchemy can handle
with the default engine options of pool_size=5 and max_overflow=10?
The application I'm working on has the potential for bursts of
I am coming from the Zope world and implemented a SA integration layer
z3c.sqlalchemy. It basically provides a 'wrapper' exposing a thread-local
session as property and as a registry for mappers that can be accessed
through a getMapper(mapper_name) method. Now with the declarative layer I
am
--On 29. Juni 2008 16:57:16 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
On Jun 29, 2008, at 12:46 PM, Andreas Jung wrote:
This approach is ugly (because of putting the mapper within the local
scope into the global scope (in order to make them importable) and
because
of this code within
--On 11. Juni 2008 17:55:44 +0100 King Simon-NFHD78
[EMAIL PROTECTED] wrote:
-Original Message-
From: sqlalchemy@googlegroups.com [mailto:[EMAIL PROTECTED]
On Behalf Of jack2318
Sent: 11 June 2008 17:50
To: sqlalchemy
Subject: [sqlalchemy] text
I tried very simple test:
s =
--On 31. März 2008 01:25:48 +0800 张沈鹏(电子科大
毕/就业倒计时...) [EMAIL PROTECTED] wrote:
I just mean default value in the create table's sql .
such as
CREATE TABLE xxx
(
id INTEGER NOT NULL,
value INTEGER default 0
)
Table(..., default=xxx)
-aj
pgpR3GBJhaQEH.pgp
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--On 18. Januar 2008 15:56:02 -0800 Alex Turner [EMAIL PROTECTED] wrote:
I am getting an error connecting to Postgresql:
ImportError: unknown database 'psycopg'
The canonical driver name for Postgres databases is 'postgres'.
Looks like a typo in Martin's book. psycopg(2) is name of the
--On 18. Januar 2008 12:08:46 -0500 Rick Morrison [EMAIL PROTECTED]
wrote:
There are no generic date functions in SQLAlchemy (although work has begun
on them). So for now, you'll need to use date functions native to your
database.
For sqlite something like,
func.strftime('%Y',
Hi,
running SA 0.3.11 against PG 7.4.
A SA query like
session.query(Node).query(func.any(Node.c.tools=='1234')
produces the following SQL code:
select from node where
where any(node.tools) = '1234'.
However Postgres does not support this syntax and complains
with a syntax error.
--On 2. Januar 2008 11:11:20 -0500 Michael Bayer [EMAIL PROTECTED]
wrote:
On Jan 2, 2008, at 2:56 AM, Andreas Jung wrote:
I have a PG table containing a row
tools varchar(256)[][]
that stores a list of tuples ('HI1234', 'somestring').
Setting the tools property on Python level leads
--On 30. Dezember 2007 18:02:13 -0500 Michael Bayer
[EMAIL PROTECTED] wrote:
I am using this model since some years for the application (hand-
made Python code/SQL queries) but now I want to adopt it to SA.
The basic question is how I would extend the configuration for the
I have a PG table containing a row
tools varchar(256)[][]
that stores a list of tuples ('HI1234', 'somestring').
Setting the tools property on Python level leads to bad SQL code:
ProgrammingError) Fehler »syntax error« bei »,« at character 52 'UPDATE
hierarchies SET tools=%(tools)s WHERE
Hi,
I habe a table where we store tree-ish data using a self-referential
mapper (same setup as within the SA docs using an id for the nodes
and a pointer back to the parent node given by its id)...this works
without a problem.
Now comes the tricky part: a node from one tree can point to a node
Is there a way to protect objects from modifications? I have a complex
self-referential data structure that is passed to some other modules
written by co-workers. I need to avoid that the data structure is changed
(because
of programming errors). Is there an easy way to accomplish this (other
--On 14. September 2007 10:07:27 -0700 jason kirtland [EMAIL PROTECTED]
wrote:
jean-marc pouchoulon wrote:
helo,
I don't understand why my sqlite database is locked on a drop ( the code
is following)
thanks for your explanation.
[...snip...]
ordinateurs =
I've been using the following code for obtaining a mapper class
from some other mapper.
class_mapper(self.__class__).props[name].mapper.class
'props' is no longer available however I found '_Mapper__props'.
Is this the right replacement or is there a smarter way?
Andreas
pgpLkaS4WLfE3.pgp
--On 6. Juli 2007 23:27:30 + jose [EMAIL PROTECTED] wrote:
I've got a question that I can't find the answer to. I have a table
called seminars with a date field in it to hold the seminar dates. I
want to query the table to find all the dates for a specific year. I
tried
Clear()ing the session before the mandatory commit resolved the issue
(more a workaround than a solution :-).
Andreas
--On 6. Juli 2007 12:25:25 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
I have a self-referential mapper where a view is involved within a
primaryjoin of a relation
--On 6. Juli 2007 11:15:38 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
On Jul 6, 2007, at 6:25 AM, Andreas Jung wrote:
I have a self-referential mapper where a view is involved within a
primaryjoin of a relation. Traversing a tree represented through
the mapper generates a bunch
I have a case where SA 0.3.8 create wrong SQL code and an unneeded and
unwanted
INSERT statement. My code inserts a new Arbeitsmittel into the DB using:
Arbeitsmittel = wrapper.getMapper('arbeitsmittel')
d = {'hidx' : hidx,
'zodb_path' : zodb_path,
'versionsnr' : 0,
At least the select() method has an optional parameter 'lockmode'.
You might check the docs and the release notes.
-aj
--On 29. Juni 2007 08:23:16 + mc [EMAIL PROTECTED] wrote:
Hi,
I need to lock a table for WRITE.
The scenario is that I have a SELECT followed by an INSERT, where the
--On 27. Juni 2007 12:00:13 -0700 voltron [EMAIL PROTECTED] wrote:
I´m guessing a bit because I still could not find the group_by entry
in the docs
This works:
user.select(links.c.id 3, order_by=[user.c.id]).execute()
but this does not
user.select(links.c.id
I have a mapper defined as
mapper(HierNode, HierTable, properties={
'tools' : relation(ToolNode),
})
Usually I am interested in iterating over all 'tools' and lazy loading
works fine. However sometimes I need to determine if one HierNode
has tools or not. Loading all tools would be too
Hi,
I have a self-referential mapper that looks like that.
Basicially a tree of 'HierarchyNode' where the leafs are
'ArbeitsmittelHierarchyNode' (accessed through the '_tools' property)
mapper(HierarchyNode, HierarchyTable, properties={
'_children' : relation(
--On 15. Juni 2007 12:55:43 + voltron [EMAIL PROTECTED] wrote:
Could someone point me to the documentation about declaring and using
Sequence fields in Sqlalchemy?
Check yourself with the SA docs on sqlalchemy.org under defining
sequences.
-aj
pgpWMRtJ1NwMS.pgp
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--On 15. Juni 2007 09:46:27 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
On Jun 15, 2007, at 3:19 AM, Andreas Jung wrote:
Bug or feature?
I cant speak authoritatively here at all since youve given me no
information about your schema, ive no idea what AMH_View represents,
but AFAICT
--On 15. Juni 2007 16:09:32 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
--On 15. Juni 2007 09:46:27 -0400 Michael Bayer
[EMAIL PROTECTED] wrote:
On Jun 15, 2007, at 3:19 AM, Andreas Jung wrote:
Bug or feature?
I cant speak authoritatively here at all since youve given me
From: Andreas Jung [EMAIL PROTECTED]
To: sqlalchemy@googlegroups.com
Subject: engine.base._convert_key() fails with long col names
Date-Sent: 14. Juni 2007 15:14:37
Hi,
I am getting the following traceback
* Module toolbox.product.export_bauplan2, line 96, in export_bauplan
* Module
--On 14. Juni 2007 14:13:47 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
On Jun 14, 2007, at 9:16 AM, Andreas Jung wrote:
This happens when _convert_key() is called with
key='arbeitsmittelhierarchy_arbeitsmittel_view.stammdatenverwaltung_ta
uglich'
im confused. are you passing
is there a way to determine if the underlying MySQL DB is able to perform
a commit() operation? The following code fails (likely because the
underlying MySQL db is pretty old, V3ish).
Andreas
--
dsn = 'mysql://'
e = create_engine(dsn)
c=e.connect()
t = c.begin()
t.commit()
--On 8. Juni 2007 14:05:39 -0400 Rick Morrison [EMAIL PROTECTED]
wrote:
try:
t.commit()
except:
print 'Holy cow, this database is lame'
This code is also lame :-) The code should work
for arbitrary DSNs and swallowing an exception while
committing is evil, evil, evil.
-aj
--On 27. Mai 2007 23:27:30 -0700 Alchemist [EMAIL PROTECTED] wrote:
I developed my web application in TurboGears 1.0.1 (Python 2.4,
CherryPy 2.2.1 and SQLAlchemy 0.3.6) and used Postgresql 8.2 as my
backend. Also, I am using psycopg2.
I am running stress tests (using tools such as WAPT and
--On 27. Mai 2007 23:45:43 -0700 Alchemist [EMAIL PROTECTED] wrote:
@Andreas Jung
What SA configurations did you set/unset for your Zope application?
Nothing special. I am using my own z3c.sqlalchemy framework (Google,
search on Cheeseshop).
Which SA files should I modify in order
--On 16. Mai 2007 13:45:21 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
new to the FAQ:
http://www.sqlalchemy.org/trac/wiki/
FAQ#FlushError:instancesomeinstanceisanunsavedpendinginstanceandisanorph
an
The FAQ does not explain the problem. Look at the real code:
def
--On 17. Mai 2007 00:28:35 +0200 David Anderson [EMAIL PROTECTED] wrote:
I am guessing that somewhere in the mix the engine information is
severed from the metadata when jumping to the other thread, but I have
no idea how to fix this problem. Can anyone give me pointers on how to
get my
--On 17. Mai 2007 10:16:17 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
--On 16. Mai 2007 13:45:21 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
This code causes the trouble. There is no save() operation involved - just
a flush() operation driven by the Zope transaction integration of SA
I am building a media database using SA where the model basically maps
Medium --1:N-- Versions --1:N-- Files
My code for creating new Medium instances based on an import script
basically is doing the following:
f = File(...)
v = Version()
v.files.append(f)
m = Medium()
I have the following (scary) use-case:
Table 'media' has 1 : N relationship to table 'history'.
class Media(object):
def addHistory(self, comment):
self.history.append(History()))
Inside addHistory() I need to get hold of the mapper class History for
'history' in order to append
Hi,
what is the common pattern to duplicate a row? I have several cases where I
obtain a row and need to insert it with some slightly modifications back
into the table. I've written a small copy method for that but it is ugly
code. What's the common way to do that?
Andreas
pgpOYYmiHG4WV.pgp
or higher
Installation:
=
- either download z3c.sqlalchemy from Cheeseshop
http://cheeseshop.python.org/pypi/z3c.sqlalchemy/
- or use easy_install:
easy_install z3c.sqlalchemy
Andreas Jung
--
ZOPYX Ltd. Co. KG - Charlottenstr. 37/1 - 72070 Tübingen - Germany
Web
Hi,
I am currently working on a deeper integration of SA into Zope 2.
Is it possible to determine if an engine has open connections to a database?
Is it possible to close all connections? This is necessary since a database
adapter in Zope can be switched off in order to close connections
I have a scenario where we I need to execute SQL directly within a
transaction that is local to a Python thread. Is there some way to this in
SA? In this particular usecase there is no UOW involved. Or is it somehow
to pass a SQL statement somehow to the session and its underlaying
framework?
--On 30. April 2007 19:34:41 + Ian Charnas [EMAIL PROTECTED] wrote:
Yes! While most *any* query can be done using sqlalchemy... and you
*should* try to use sqlalchemy because then if you change databases
you won't have to go through all your code and figure out if any of
the sql is
--On 27. April 2007 12:57:06 -0700 johnny [EMAIL PROTECTED] wrote:
Does this create a Object Mappers for those tables, so I can do the
following:
Lets say I have a table called user with columns user_name and
password.
ed = User()
ed.user_name = 'Ed'
ed.password = 'edspassword'
You might
--On 28. April 2007 09:00:36 -0700 johnny [EMAIL PROTECTED] wrote:
What I was trying to get was, there isn't a python command line
option, that will create Object Mapper Classes for the tables,
What should that be?
so I
can import them within my applications. I guess, I have to code
--On 25. April 2007 07:13:19 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
well i just noticed youre sticking an external table into your
primaryjoinbut i see nothing there that implies the usage of a
LEFT OUTER JOIN ? are you saying that you dont need the rows from
AMH_View to be
I resolved this issue. Choosing a different mapper class as first arg
of the relation() call solved this issue and everything is working
perfectly.
-aj
--On 26. April 2007 08:44:22 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
--On 25. April 2007 07:13:19 -0400 Michael Bayer
[EMAIL PROTECTED
--On 24. April 2007 08:54:55 -0400 Michael Bayer [EMAIL PROTECTED]
wrote:
On Apr 24, 2007, at 4:27 AM, Andreas Jung wrote:
Because both tables are big the query takes forever. Using a LEFT JOIN
would definitely be faster. Is there a way to configure the 'tools'
property in a smarter
During a select() I get the following error:
2007-04-23 08:02:24,447 INFO sqlalchemy.engine.base.Engine.0x..94 {'table':
24892275}
class 'z3c.sqlalchemy.mapper._mapped_arbeitsmittel'
2007-04-23 08:02:24,480 INFO sqlalchemy.engine.base.Engine.0x..94 SELECT
arbeitsmittel.idsachgebiet AS
Additional info: using SA 0.3.6, Postgres 7.4.6, psycopg 2.0.4
Andreas
--On 23. April 2007 08:09:30 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
During a select() I get the following error:
2007-04-23 08:02:24,447 INFO sqlalchemy.engine.base.Engine.0x..94
{'table': 24892275}
class
--On 23. April 2007 08:18:54 +0200 Andreas Jung [EMAIL PROTECTED] wrote:
Additional info: using SA 0.3.6, Postgres 7.4.6, psycopg 2.0.4
Andreas
File build/bdist.linux-i686/egg/sqlalchemy/engine/base.py, line 971,
in fetchall
ValueError: second must be in 0..59
Any idea where
I know that it is possible to pass a SQL statement directly to
engine.execute(). Is there a similar API for executing q SQL statement
through a Session instance?
Andreas
pgpYtd9cx8rNT.pgp
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--On 23. März 2007 16:14:26 + Koen Bok [EMAIL PROTECTED] wrote:
Could anyone please explain me a little why self referantial mappers
cannot be eager-loading. Is this not yet integrated in SQLAlchemy or
theoratically impossible or impractical?
Do you really want to load a possibly
In a traditional application you can insert a new row and read the row
within the same transaction. What is the typical usage pattern to deal with
this in SA? In our particular setup (Zope) a new session is created for
each new HTTP request and flushed automatically at the end of request when
Hi,
are there any plans to support the BIT type of Postgres?
Andreas
pgp5Z1roj65VK.pgp
Description: PGP signature
I have a Table instance with a UniqueConstraint. SA fails while creating
a copy of the table using table.tometadata(). Is there a workaround?
Andreas
-
Traceback (most recent call last):
File schema.py, line 77, in ?
M.createTables()
File schema.py, line 35, in createTables
I am getting the following error when defining a one-to-many relationship
using the following code:
db = create_engine('postgres://postgres:[EMAIL PROTECTED]/eCommerce')
metadata = BoundMetaData(db)
mapperFactory = MapperFactory(metadata)
ProductAward, ProductAwardTable =
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