Re: Template Toolkit and DateTime::Duration->compare()

[Arshavir Grigorian]

Well, here is what I have.
$self->{life_left} = $self->{expire_date} - DateTime->now();
where $self->{expire_date} is a DateTime object and $self->{life_left} 
is a DateTime::Duration object.

Then in the template, I do the following:
<td>[% object.life_left.years %]</td>
Hope this makes sense.
Additionally, I will need to do some rounding on the Duration object (if 
more then siz months => add year, etc).

Thank you for any ideas you might have.
Arshavir


[EMAIL PROTECTED] wrote:
"DateTime::Format::Duration" may be what you need for
this specific problem. Can you show us a few lines of
your template?
- Flavio S. Glock
 

I am running into a snag with using
   

DateTime::Duration and TT. I think 
 

it's an important issue and am surprised that there
   

is no info on this 
 

on Google.
Somehow when you try to invoke any of
   

DateTime::Duration's accessor 
 

methods from within a TT template it dies with an
   

error that comparison 
 

operators are not overloaded in DateTime::Duration
   

and that I should use 
 

DateTime::Duration->compare() to do comparisons.
I have tracked this down and it appears that
   

somewhere deep in the 
 

template processing, TT is doing an 'eq' on a
   

DateTime::Duration object 
 

and that's throwing an exception.
I am wondering whether it would be very hard to
   

overload the comparison 
 

operators.
If both objects are of DateTime::Duration, then can
   

you just call 
 

compare from within _compare_overload(). And if
   

they are not of the same 
 

type, then they are obviously not equal.
Or maybe the 'eq' operator could be a special case
   

of comparison, 
 

implemented as a separate _eq_overload() subroutine.
Maybe, I am asking for too much, but it seems like
   

what I am trying to 
 

do is fairly mundane.
Thanks for any insights you may have.
Arshavir