Re: [SQLObject] Counting too often

[Frank B. <fb...@fo...>]

Hallo,
Ian Bicking hat gesagt: // Ian Bicking wrote:

> On Nov 3, 2003, at 10:51 AM, Frank Barknecht wrote:
> There's a wonky behavior in list() (and maybe various related methods) 
> where it will get the length before iterating over the value, 
> presumably so it can pre-allocate space.  Drove me nuts, because it 
> ignores any exceptions and so seems very magical.
> 
> As a result I actually got rid of __len__ at some point (hmm... maybe 
> between 0.4 and 0.5, though if so I forgot to document it), and 
> replaced it with a .count() method so database calls wouldn't be 
> implicitly triggered.  Sadly this ruins truth-testing, though maybe 
> that was dangerous too.
> 
> Anyway, this shouldn't happen in 0.5.

Hm, I'm using current CVS, and there SQLObject.py still has a __len__,
but no "count" method.  I actually don't use a pure list in my code
but a class called "ProductDisplay" derived from list. With some
little changes I could make without inheriting from list: I only use
"for x in productDisplay_instance: do things" which should be possible
without ProductDisplay being a list. Would going this route help?

ciao
-- 
 Frank Barknecht                               _ ______footils.org__