[html-formfu] custom element with automatic constraint

[Stephen Caldwell]

Carl Franks wrote:
> On 26/02/2008, Steve Caldwell <info-formfu at caldwellhb.com> wrote:
>   
>> All,
>>
>>  Because I have so many instances of this in my code:
>>
>>   - type: Select
>>     ...
>>     constraints:
>>       - type: AutoSet
>>
>>
>>  I wanted to create a custom class that inherits from Element::Select and
>>  automatically includes AutoSet as a constraint.  After poking around at
>>  the documentation/code for a little bit, it's not immediately obvious to
>>  me how to do this.  Has anyone tried this before, or have any advice on
>>  where I could look?
>>     
>
> I believe this should work (untested):
>
> package MySelect;
> use strict;
> use base 'HTML::FormFu::Element::Select';
> use Class::C3;
>
> sub process {
>     my $self = shift;
>
>     $self->constraint('AutoSet')
>         unless $self->get_constraint({ type => 'AutoSet' });
>
>     return $self->next::method(@_);
> }
>
>
>     ---
>     element:
>       - type: '+MySelect'
>
> The '+' prefix is because it isn't within the HTML::FormFu::Element::*
> namespace.
>
> Carl
>   

that did work, thanks Carl.