On Dec 5, 2011, at 1:40 AM, kris wrote:
I have added the flush every 1024 loads, and also set DBSession.autoflush =
False, but I see that I have
gone and used up all available memory again. There are no other references
than the ones in the session.
A bit more information, I am
Say I have a class that derives from a Node class that has a 'parent'
relationship (using 'parent_id' and 'id' fields):
from sqlalchemy.ext.hybrid import hybrid_property
class MyClass(Node):
@hybrid_property
def grandparent(self):
return self.parent.parent
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On Dec 5, 2011, at 11:58 AM, Daniel Nouri wrote:
Say I have a class that derives from a Node class that has a 'parent'
relationship (using 'parent_id' and 'id' fields):
from sqlalchemy.ext.hybrid import hybrid_property
class
On Mon, Dec 5, 2011 at 6:42 PM, Michael Bayer mike...@zzzcomputing.com wrote:
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On Dec 5, 2011, at 11:58 AM, Daniel Nouri wrote:
Say I have a class that derives from a Node class that has a 'parent'
relationship (using 'parent_id' and 'id'
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On Dec 5, 2011, at 1:39 PM, Daniel Nouri wrote:
Thanks for your explanation. I haven't used hybrid a lot yet and this
helped me understand what it does and what not.
Your last example that uses a 'with_transformation', i.e. a protocol
that
I have two tables, SystemVariables and VariableOptions. SystemVariables is
self-explanatory, and VariableOptions contains all of the possible values for
all of the variables.
VariableOptions has a foreign key, variable_id, which states which variable it
is an option for. SystemVariables has a
On Dec 5, 2011, at 7:40 PM, Jackson, Cameron wrote:
I have two tables, SystemVariables and VariableOptions. SystemVariables is
self-explanatory, and VariableOptions contains all of the possible values for
all of the variables.
VariableOptions has a foreign key, variable_id, which states
Thanks Mike. Might put this on the back-burner for now, and I'll look into it
again when I get the time.
Cheers.
Cameron Jackson
Engineering Intern
Air Operations
Thales Australia
Thales Australia Centre, WTC Northbank Wharf, Concourse Level,
Siddeley Street, Melbourne, VIC 3005, Australia
Tel:
Michael,
Thanks so much for your prompt answer. Instead of going into the extensive
details of my program - I decided to abstract from it and
just try to get down the basic operations of the construct. So - I wrote a very
simple tutorial that pretty much implements what the
documentation
On Dec 5, 2011, at 9:57 PM, Rivka Shenhav wrote:
Michael,
Thanks so much for your prompt answer. Instead of going into the extensive
details of my program - I decided to abstract from it and
just try to get down the basic operations of the construct. So - I wrote a
very simple tutorial
Just to follow up on this again: I asked the question at Stack Overflow as
well, and someone showed me how I can accomplish this in SQL using a compound
foreign key: http://stackoverflow.com/a/8395021/665488
Now I just have to convert his SQL into SQLAlchemy declarative syntax and I'll
have a
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