So, create a Table, use that, make sure you’re sending the right kinds of
objects to bulk_insert().
Thank you very much for that very quick reply, this did the trick. The
try/except blocks in my post above were just to show what I've tried so far.
I'll include my working code so that it
Hello Michael,
On Sunday, March 16, 2014 10:19:16 PM UTC+1, Michael Bayer wrote:
are you sure it’s actually saying “SET NULL” in the SQL? if the value
isn’t present in the params, that just means it’s leaving it unaffected.
this is normal behavior when the value hasn’t changed.
I
A slightly improved version, where I activated the
onupdate=_validate_editor() check again to log an error if it finds
editor_id not set.
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Hi everyone :)
I have an application with some kind of dynamic model.
Several plugins define subclasses of a common base class and override their
behaviour, but they do not change any column.
In some scenarios, not all the puglins are loaded, so not all the
subclasses are present/defined in the
On Mar 17, 2014, at 6:48 AM, Pau Tallada tall...@pic.es wrote:
Hi everyone :)
I have an application with some kind of dynamic model.
Several plugins define subclasses of a common base class and override their
behaviour, but they do not change any column.
In some scenarios, not all the
This is what I suggested originally, you set tn.editor_id to 2, then you run
the same loop over and over again. the value of tn.editor_id does not change,
and is not part of the parameters in the UPDATE statement. if you remove the
column on update and look at the echoed SQL, the statements
So I did some debugging, the first time for me looking deeper into SA's
code. Hopefully I did not get too lost.
In the 3rd loop, when the loaded editor_id == 2 and was again assigned 2, I
forced a flush and stepped into SA. Down the top levels I could see SA
bearing a loaded_value == 2 and a
Wow, great explanation, thanks a lot. This also sheds light on what I had
seen during the debug.
On Monday, March 17, 2014 12:44:24 PM UTC+1, Michael Bayer wrote:
This is what I suggested originally, you set tn.editor_id to “2”, then you
run the same loop over and over again. the value of
Great!
I think it works for my needs :D
Thank you very much!
Pau.
2014-03-17 12:28 GMT+01:00 Michael Bayer mike...@zzzcomputing.com:
On Mar 17, 2014, at 6:48 AM, Pau Tallada tall...@pic.es wrote:
Hi everyone :)
I have an application with some kind of dynamic model.
Several plugins
Hi,
Can it be done in declarative?
I've tried several ways, but I cannot find a working one :/
Basically, I think I need to redefine some self-referential relationships,
as they link against the polymorphic class.
Meta = declarative_meta()
class NonPolymorphicClass(MyBaseClass):
sa.Column(
sa.Integer(),
sa.ForeignKey(
pym.user.id,
onupdate=CASCADE,
ondelete=RESTRICT
),
nullable=True,
# Learned 20140317: Don't do this if you do not want to actively
# set
hello!
good job on these extensions and utilities. i have been using some of
them, i'll give a try on the newest releases and i'll let you know.
also, i forgot to contribute code with you on github. i'll send you an
email directly.
best regards,
richard.
On 03/15/2014 06:11 AM, Konsta
maybe make a subclass of the polymorphic base, and just put __concrete__ = True
in the mapper_args.skip the non primary part.
On Mar 17, 2014, at 8:45 AM, Pau Tallada tall...@pic.es wrote:
Hi,
Can it be done in declarative?
I've tried several ways, but I cannot find a working one :/
On Mar 17, 2014, at 8:53 AM, Dirk Makowski dirk.makow...@gmail.com wrote:
On Monday, March 17, 2014 12:44:24 PM UTC+1, Michael Bayer wrote:
the last moment you would have to validate what's to be sent as an UPDATE
before the structure is fixed would be the before_update mapper event.The
Hi, I tried this, but then it selects WHERE table.type IN (NULL) :(
class NonPolymorphicClass(MyBaseClass):
__mapper_args__ = {
'concrete' : True
}
I'll try some more things, like overriding the __new__ method on the base
class, to create subclasses if they are available, and
Really nice, you helped a lot.
On Monday, March 17, 2014 3:48:43 PM UTC+1, Michael Bayer wrote:
On Mar 17, 2014, at 8:53 AM, Dirk Makowski dirk.m...@gmail.comjavascript:
wrote:
On Monday, March 17, 2014 12:44:24 PM UTC+1, Michael Bayer wrote:
the last moment you would have to validate
er, guessing, polymorphic_on=None also for that class? not sure of the mapper's
tolerance.
On Mar 17, 2014, at 12:10 PM, Pau Tallada tall...@pic.es wrote:
Hi, I tried this, but then it selects WHERE table.type IN (NULL) :(
class NonPolymorphicClass(MyBaseClass):
__mapper_args__ = {
Hi:
When I run the attached example, I get the following error:
sqlalchemy.exc.NoInspectionAvailable: No inspection system is
available for object of type type 'NoneType'
Which is a result of literal(1) appearing first in the select list.
I don't particularly care than I can't order my columns
when you do outerjoin() it will try to join from the first item in the list,
unless you do select_from:
query(literal(), X.foo, Y.bar).select_from(X).join(Y, )
will see what can be done about the error message
On Mar 17, 2014, at 2:58 PM, Ryan Kelly rpkell...@gmail.com wrote:
Hi:
the error message has been improved in 9ec01ab35a / 987759aec51e (0.9 / 0.8)
On Mar 17, 2014, at 4:16 PM, Michael Bayer mike...@zzzcomputing.com wrote:
when you do outerjoin() it will try to join from the first item in the list,
unless you do select_from:
query(literal(), X.foo,
I've been reading the documentation on Using the Session -- Merging. The
concept like *change history*, *history stream* occur several times. I know
the history attribute is something that belongs to the *Core*. But my
question is, is this really useful for learning ORM? How much knowledge
if you're talking about attribute history like
attributes.get_history(MyClass.someattr) or inspect(my_object).attrs.history,
that's all ORM stuff. SQLAlchemy Core (which might really be better to learn
first, if you're really reading the docs cover to cover as opposed to just
trying to do
i'm updating my db code, and this popped up:
InvalidRequestError: One or more mappers failed to initialize - can't
proceed with initialization of other mappers. Original exception was: id()
takes exactly one argument
is there any way to tell where/how this got triggered? There's nothing
its probably the Python builtin id being referenced somewhere
On Mar 17, 2014, at 7:28 PM, Jonathan Vanasco jonat...@findmeon.com wrote:
i'm updating my db code, and this popped up:
InvalidRequestError: One or more mappers failed to initialize - can't
proceed with initialization of
thanks. i finally found it.
i was querying TableA
TableA mapped somewhere to TableB
Table B had a backref on an 'id' field. that field got removed.
the query on TableA triggered the error , even though I wasn't loading the
'id' field. because of how the backref was constructed, it was
I'm trying to make a many-to-many relationship using sqlalchemy 0.9 and
postgres
If I put a unique constraint on the join table, and I add a duplicate, I
get an integrity error.
If I change the collection class to set, it won't double commit, however a
set prevents me from using things like
Hi,
I was creating a billing table that needs to be updated on repeated cycles
as more information becomes available for a month, so I was following an
Add Only scheme where I only add new rows, so we can keep track of the
history of the month. Now, when I show them a list of bills for the
Ok, I figured it out.
stmt =
session.query(Bill).filter_by(account_id=id).order_by(Bill.timestamp.desc()).subquery()
session.query().add_entity(Bill, alias=stmt).group_by(Bill.date_begin)
On Monday, March 17, 2014 7:44:09 PM UTC-7, Jonathan Herriott wrote:
Hi,
I was creating a billing table
On Mar 17, 2014, at 10:38 PM, Morgan McClure mcclure.mor...@gmail.com wrote:
I'm trying to make a many-to-many relationship using sqlalchemy 0.9 and
postgres
If I put a unique constraint on the join table, and I add a duplicate, I get
an integrity error.
If I change the collection class
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