Hi guys,
I've got a question regarding the association object pattern. Though
perhaps it's not what I should be using...
Let's say I've got a Parent class that I'd like to add tags with data to.
class Parent(Base)
id = Str
# The association object
class Tag(Base)
parent_id = Str
Hi Svil,
My integration between traits and sqlalchemy is working rather well
(at least it's passing the unit tests I could think of). Thanks for
all your help on that.
Now I'm trying to do something similar to what you did in dbcook with
expressions. I'd like to construct a gui for the user
Hi guys,
Is there a gui somewhere to allow a user to construct queries for
SQLAlchemy? What would the best approach be if I make one myself?
Right now I just use eval() to get some filter and order_by
expressions typed in by the user, so obviously a gui would be much
nicer.
Regards,
Christian
.
Christiaan Putter wrote:
Hi,
Small extract from the query's _get method:
if not self._populate_existing and not refresh_state and not
self._mapper_zero().always_refresh and lockmode is None:
try:
instance = self.session.identity_map[key]
state
, Christiaan Putter ceput...@googlemail.com wrote:
Hi guys,
I haven't been able to figure out how to work with sessions, threads
and a gui yet? Can someone explain to me what the best practices are?
The main problem really is that for displaying data on a gui I need an
open session the entire
Hi guys,
I haven't been able to figure out how to work with sessions, threads
and a gui yet? Can someone explain to me what the best practices are?
The main problem really is that for displaying data on a gui I need an
open session the entire time. It seems as soon as I close a session
Hi,
Right now I'm really only using multiple threads for speeding up
downloads over the internet (which I need to update the data).
Actually commiting the data is still done via the gui's thread
session. At some point speeding up the algorithms would be nice, a
concurrent solution would be
Hi,
You won't be able to get() multiple objects at the same time.
query(SomeClass).get(pk1, pk2, pk3) takes in a tuple of values
representing the primary key of some record in your table. In this
case the primary key consists of three separate columns (thus a
composite key), though the record
Hi,
You're quite right, the join was the tricky bit at first. Basically I
construct an outer join over all the 'dynamic' extension classes.
Here's an extract:
def _get_selectable(self):
j = None
for key, val in HasTraitsORM._decl_class_registry.iteritems():
if
and
watch what goes on behind and how SA-activities intertwist with
traits' /your ones.
ciao
svilen
On Sunday 22 March 2009 04:00:27 Christiaan Putter wrote:
Hi svilen,
Thanks for your advice, going through your code helped a lot in
understanding how SA works.
I've gotten traited classes
that having
several copies of essentially the same data is not a good idea perhaps
and should be treated with care.
Some thoughts from anyone perhaps?
Y'all have a great week,
Christian
2009/3/22 Christiaan Putter ceput...@googlemail.com:
Hi Svilen,
Setting up tests is a very good idea, I'll start
Hi,
Maybe some better explanation is required from my side for you to be
able to help me better.
My app is basically for doing some plotting, analysis and filtering of
securities on the stock market.
The main class that does most of the work is Security(HasTraitsORM),
where HasTraitsORM is my
Hi svilen,
Thanks for your advice, going through your code helped a lot in
understanding how SA works.
I've gotten traited classes to behave like classes generated by SA's
declarative extension. After a lot of stepping through code I
realised the main problem was that SA removes values from an
Hi Michael,
Thanks for your swift reply.
I wasn't really sure which way to go with combining Traits and SA.
From reading through the source it seemed that I had to use
InstrumentationManager, I think it said somewhere it was the stable
public interface. I had a look at the Trellis source as
Hi,
uh thats a little weird since the InstrumentationManager is designed
to be the thing you subclass. you're not supposed to subclass
ClassManager. There should be no difference in behavior subclassing
one or the other.
It behaves a little weird to when I tried it myself. I'll stick
Thanks for the link. That's where I figured out most of what I'm trying to do.
Now that I've stepped through the code I noticed that 'install_state'
is only being called on the first 2 iterations of the loop. Haven't
found out yet why that is.
What exactly is supposed to be in the state? Is
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