[Templates] Re: Array to hash with 1 result

[Bill Ward]

Another way is to create a wrapper class that uses AUTOLOAD to call
the "real" class methods (using SUPER::) but return all the values in
arrayrefs.  Use that class instead of the real one in all your code.

On 7/9/07, Ryan Blomberg <rb@eventful.com> wrote:
> The problem with that is that you have to get your ui guys to
> remember to add the _ref
>
> It is more likely that they will forget and will not test for the
> single element array case and it will
> come back to bite you.  For now we will follow the convention of
> separating our data model from
> the view (some would argue this is the correct thing to do anyway).
>
> rb
>
> On Jul 9, 2007, at 11:09 AM, Bill Ward wrote:
>
> > You could add new methods to your object that return refs.  So if
> > you have
> >
> > sub function
> > { .... return @something }
> >
> > then you could create an additional subroutine:
> >
> > sub function_ref
> > {
> >    my $self = shift;
> >    my @something = $self->function(@_);
> >    \@something;
> > }
> >
> > Use the latter in your templates.
> >
> > On 7/9/07, Ryan Blomberg <rb@eventful.com> wrote:
> >> Sergey and Cees,
> >>
> >> Sergey, I am using 2.18 as well.. but discovered why it is happening.
> >>
> >> Due to perl not being strong typed a subroutine can return whatever
> >> it wants (scalar,hash,array,reference).
> >>
> >> TT tries to guess what was returned so that is in the correct context
> >> by doing the following:
> >>
> >> my @return = &function(@args);
> >>
> >> if(scalar(@return) > 1) {
> >>         assume array of stuff
> >> } else {
> >>         return $return[0];
> >> }
> >>
> >> It does that because doing the following would break things:
> >>
> >> my $return = &function(@args); (would only get first key or first
> >> element if an array or hash is returned)
> >>
> >> But, doing it this way means they make a guess in the case of arrays
> >> and hashes that yields my issue.
> >>
> >> As Cees explained.. the best way to fix this is to always return
> >> references or scalars from your subs and never arrays or hashes.
> >>
> >> We return arrays and hashes in more places than I would like to admit
> >> though so we will probably just avoid calling object subroutines in
> >> templates.
> >>
> >> rb
> >>
> >> I am using 2.18 as well.
> >>
> >> On Jul 7, 2007, at 6:33 AM, Sergey Martynoff wrote:
> >>
> >> >
> >> >> my template does the following
> >> >>
> >> >> [% FOREACH thing IN object.list_things() %]
> >> >>    The name of the thing is [% thing.name %]
> >> >> [% END %]
> >> >>
> >> >> If the function returns
> >> >>
> >> >> return [ { name => 'test' } ];
> >> >>
> >> >> I get not output and dumping the result of the function yields
> >> $VAR1
> >> >> = { name => 'test' } instead of the expected $VAR1 = [ { name =>
> >> >> 'test' } ]
> >> >
> >> > You are probably using an older version of Template Tookit. I
> >> > recall that
> >> > there was such a problem formerly, but I cannot repeat this bug on
> >> > TT 2.18.
> >> >
> >> >
> >> > --
> >> > Sergey Martynoff
> >> >
> >> >
> >> > _______________________________________________
> >> > templates mailing list
> >> > templates@template-toolkit.org
> >> > http://lists.template-toolkit.org/mailman/listinfo/templates
> >> >
> >>
> >>
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> >>
> >
> >
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>


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