[Dbix-class] Dynamic defaults

[Alexander Hartmaier]

first hit on https://metacpan.org/search?q=dbix%3A%3Aclass+dynamic+default

Am 2011-11-29 15:31, schrieb Benjamin Martin:
> hello,
>
> I am not sure if I am doing the right thing so I ask here for advice
> please :)
>
> I have 2 tables, chart and sections. A chart is made of multiple
> sections (chart has_many sections)
> When I add a new section to a chart I want to give it a default name
> of 'Section 1' or 'Section 2' and so on.
>
> The DBIx::Class docs says that to provide defaults one should have a
> 'new' method.
> The Moose docs state to "never override new"
>
> The above makes me think I am doing the wrong thing. In my Section
> class I have this:
>
>
> around new => sub {
>     my ($orig, $self) = (shift, shift);
>     my ( $attrs ) = @_;
>
>     if ( $attrs->{chart_id} ) {
>         my $schema = $attrs->{-result_source}->schema;
>         my $chart = $schema->resultset('Chart')->find(
> $attrs->{chart_id} );
>         unless( defined $attrs->{name} ) {
>             my $number_of_sections = $chart->sections->count;
>             $attrs->{name} = 'Section ' . ($number_of_sections + 1);
>         }
>     }
>
>     my $new = $self->$orig($attrs);
>     return $new;
> };
>
>
> Is there a better way to achieve this?
> It seems some what hacky to use '-result_source' ... is there a better
> way?
>
> Thanks for any advice you can give.
>
> tar,
> -b
>
>
>
>
> _______________________________________________
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> --
> Cheers, Alex


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