On Wednesday, July 23, 2014 7:50:48 PM UTC-4, Michael Bayer wrote:
>
> you should be able to say:
>
> group_by(“first_letter”)
>
> should go right in under that label.
>
> works for order by at least.
>
i can't believe i didn't try that first. works as promised. thanks!
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you should be able to say:
group_by("first_letter")
should go right in under that label.
works for order by at least.
On Jul 23, 2014, at 7:31 PM, Jonathan Vanasco wrote:
> I want to generate this SQL:
>
> SELECT
> SUBSTR(domain_name, 1, 1) as first_letter,
>
I want to generate this SQL:
SELECT
SUBSTR(domain_name, 1, 1) as first_letter,
COUNT(domain_name) as counted
FROM domain
GROUP BY first_letter;
The closest I can get to it is this:
dbSession.query(
sqlalchemy.func.count( model
On Jul 23, 2014, at 4:52 PM, Milind Vaidya wrote:
> Well only caveat here is that I am inserting a list of objects in one go
> using session.add_all()
if you do an add_all(), then say flush(), it will emit INSERT statements for
all of them. If any INSERT fails, the whole operation is rolle
Well only caveat here is that I am inserting a list of objects in one go
using session.add_all()
On Wednesday, July 23, 2014 2:01:18 PM UTC-5, Michael Bayer wrote:
>
> use a savepoint:
>
> from sqlalchemy import exc
> try:
>with session.begin_nested():
> session.add(MyObject())
>
I've posted the answer on StackOverflow. You have client_encoding =
sql_ascii in your postgresql.conf, and you just need to change that to utf8
or override it in your create_engine call.
Cheers,
Gulli
On Wed, Jul 23, 2014 at 6:59 PM, Michael Bayer
wrote:
>
> On Jul 23, 2014, at 1:20 PM, Andr
use a savepoint:
from sqlalchemy import exc
try:
with session.begin_nested():
session.add(MyObject())
session.flush()
except exc.IntegrityError:
pass
session.commit()
personally I prefer just to emit a SELECT first, which may be a per-row SELECT
or may be a prefetch of al
If this happens rarely and your database supports savepoints, you can just
do the insert within one. if you catch an integrity error, do a rollback
and then select.
`begin_nested` is the SqlAlchemy command to handle savepoints.
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On Jul 23, 2014, at 1:20 PM, Andrew Pashkin wrote:
> Hi all!
>
> I have an issue with unicode and SQLAlchemy.
>
> I've created topic on SO:
> http://stackoverflow.com/questions/24795444/how-to-save-unicode-with-sqlalchemy
>
> And repository with Vagrant/Ansible setup, so you can easily reprod
I have a script which updates DB periodically. There are some base table
which may undergo some change but very rarely. In such case if this script
tries to insert the already present value it will throw integrity error.
Is there any way of dealing with this other that first fetch the value
man
Hi all!
I have an issue with unicode and SQLAlchemy.
I've created topic on SO:
http://stackoverflow.com/questions/24795444/how-to-save-unicode-with-sqlalchemy
And repository with Vagrant/Ansible setup, so you can easily reproduce this
bug on your local machine:
https://github.com/AndrewPashkin/
I would probably do:
# Keep track of manufacturer names
t_manufacturer = Table(u'manufacturer', metadata,
Column(u'id', Integer, primary_key=True,
Column(u'name', String(20))
)
# Keep track of model names
t_model = Table(u'model', metadata,
Column(u'id', Integer, primary_key=True,
Column(u'manufa
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