This is usually done in the ORM with functions, and possibly hybrids.
See https://docs.sqlalchemy.org/en/14/orm/mapped_attributes.html
On Tuesday, August 9, 2022 at 1:55:45 PM UTC-4 Justvuur wrote:
> Hi there,
>
> Is there a way to pass/access model data for a row within the "
>
Thanks for persisting with me - your solution was almost perfect, and
really pointing me in the right direction. Below is what eventually
worked:
areas = relationship('DbArea', backref = backref('routes',
order_by = 'DbRoute.name'),
secondary = area_relationship_table,
Michael -
I greatly appreciate the time and consideration you put into your
thorough reply. It has really helped me better understand how SQL
Alchemy handles associations. In particular, it is now apparent to me
that there is no clear association between area and route, which makes
it not
On Jan 9, 2012, at 11:58 PM, jonstjohn wrote:
The route and area relationship is similar to the hypothetical problem
of a business location. Suppose you have a set of business locations,
each in a specific city. The business must be associated with one and
only one city. The city is
Turning on logging gives lots of logs, anyway we also thought that
self.all() is returning a very large data-set (we don't have BLOBs)
Are there any limits and is there anyway we can increase the memory
here, maybe of python process itself
Is there any other solution you suggest if select itself
usually applying limit() to the select is the solution for that
On Mar 31, 2011, at 8:14 PM, Harish Tejwani wrote:
Turning on logging gives lots of logs, anyway we also thought that
self.all() is returning a very large data-set (we don't have BLOBs)
Are there any limits and is there anyway
Hi
thanks for the quick reply and pointing me in the right direction.
it seems the error is actually related to the operator.
is there anything SA can do on this issue?
In the meantime i am going to change my query.
thanks again..
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I'm not familiar with the operator in Oracle or its syntax. The first step
would be to create a cx_oracle sample script that emits the exact SQL you're
looking for. We could then see how to adapt it to SQLAlchemy.
On May 19, 2010, at 2:45 AM, dhanil anupurath wrote:
Hi
thanks for the
Hi
SORRY for the delay to reply.
Here is what my definitions.
These are my class and table definitions:
class Task(DeclarativeBase):
task_id = Column(Integer,Sequence('id_
seq'), primary_key=True)
task_type = Column(Unicode(50), default=to_unicode('Task'))
name =
Hi
task = Task(u'Task',\
{'quiet':False}, [], {}, None, u'admin')
model.DBSession.merge(task)
in my database the following query will try to select the above task
object and result in error
DBSession.query(TaskCalendar).options(eagerload('task')).\
attached is a test program that is of a format which allows us to be able to
answer your questions quickly. It is a short test program that runs fully,
using the model fragments you've sent along.
It does not reproduce your error. Instead, it appears that the is not an
operator accepted
Hi
This is my class definition
class TaskCalendar(DeclarativeBase):
__tablename__ = 'task_calendars1'
cal_id = Column(Integer,Sequence('id_seq'), primary_key=True)
task_id = Column(Integer, ForeignKey('tasks.task_id'))
dow = Column(Integer)
month = Column(Integer)
day =
This is not enough detail to provide any insight into your issue. We would
require the mapping for TaskCalendar, Tasks, as well as code which inserts the
offending data into the database and then issues your query, reproducing the
error you are getting.
On May 10, 2010, at 8:54 AM, dhanil
Hello,
Thx for the answer, thx to Alexandre to translate my mail.
Sorry, i continue in english, i tried to do that at the end of my
declaration file :
Base.metadata.create_all(engine)
import sqlalchemy.orm.query
class MyQuery(sqlalchemy.orm.query.Query):
def __init__(*arg, **kw):
In Python, you have to pass self as first argument to all methods of a class:
class MyQuery(sqlalchemy.orm.query.Query):
def __init__(self, *arg, **kw):
...
Alex
2009/9/18 Christian Démolis christiandemo...@gmail.com:
Hello,
Thx for the answer, thx to Alexandre to translate my
^^
I m so shameful
It works very well now.
I post the subclass complete if anyone need it in future
Base.metadata.create_all(engine)
import sqlalchemy.orm.query
from sqlalchemy.orm.query import Query
class Query(Query):
def __init__(self, *arg, **kw):
print I pass here
2009/9/17 Christian Démolis christiandemo...@gmail.com:
How can i force sqlalchemy to refresh an object when i did a
session.query???
You may want look at this:
http://www.sqlalchemy.org/docs/05/session.html#refreshing-expiring
You may, as well, look at expunging.
Alex
Bonjour,
Tu es français je pense au vu de ton prénom.
Je continue donc en français.
En fait j'ai 25000 lignes de codes derrière moi et j'aimerai éviter d'avoir
à ajouter tous les refresh ou les session.query().populate_existing()
partout dans mon code
J'ai tenté en vain de surcharger la méthode
Alexandre Conrad wrote:
Christian,
2009/9/17 Christian Démolis christiandemo...@gmail.com:
Bonjour,
Tu es français je pense au vu de ton prénom.
Je continue donc en français.
Nice guess.
I understand it feels more comfortable writing in French rather than
in English, but many people
On 12/4/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Can you use real numbers and date into SQL Alchemy database?
In a word: yes. For real numbers, you'd use the Float() column type,
and for dates, you'd use the Date() column type. (Or the DateTime()
column type if you wanted both a date and
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