Re: [SQLObject] Re: Bool value of SelectResult

[Ian B. <ia...@co...>]

Oleg Broytmann wrote:
> On Thu, May 18, 2006 at 04:17:48PM -0500, Ian Bicking wrote:
> 
>>I don't think that exactly fits the original idea, though, where 
>>list(Person.select()[:1]) is probably the best/fastest way to get the 
>>first item if one exists.
> 
> 
>    Well, it seems it'd be best for SQLObject to implement neither __len__
> nor __nonzero__. Please somebody write a FAQ entry summarizing the thread;
> add code snippets.

It inherits __nonzero__ already (so SelectResults are always true), but 
does not implement __len__.  Like I said, I really dislike those very 
few instances where you might encounter objects you can't test an object 
for truth, so I'm not very positive about that resolution.  But I don't 
know, that's really the only way to keep people from introducing bugs 
into their code, since it's so natural (but probably incorrect) to test 
a SelectResult for truthfulness.


-- 
Ian Bicking  /  ia...@co...  /  http://blog.ianbicking.org