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Message from discussion Customised choices in form element?
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John Siracusa  
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 More options May 3 2009, 8:20 am
From: John Siracusa <sirac...@gmail.com>
Date: Sun, 3 May 2009 08:20:55 -0400
Local: Sun, May 3 2009 8:20 am
Subject: Re: Customised choices in form element?
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On Sun, May 3, 2009 at 4:41 AM, James Masters <ja...@mastersgames.com> wrote:
> I have a form that works nicely but I would like to add a Radio Button
> field to it with the choices taking values that are dependent upon the
> database object that is initialised with the form.  The choices hash
> can be generated easily given the database object.  But I suppose that
> since the form is generated with the following 2 lines, the only way
> for this to work would be if I could pass the $dbobj to the "new"
> method somehow.

> my $form = $formclass->new;
> $form->init_with_object($dbobj);

> Is this possible?  I suppose another way (although less preferable for
> me) would be to generate the choices hash first and then pass this
> somehow though using the "new" method.  Is that possible?

There's no reason you can't do your form manipulations in
init_with_object().  Just have your radio button group field
("my_field") all ready and waiting in the form, then set the choices
in init_with_object():

    sub init_with_object
    {
      my($self, $object) = @_;

      my $choices = ...get $choices from $object somehow...

      $self->field('my_field')->choices($choices);

      # Proceed with normal init_with_object() stuff...
      $self->SUPER::init_with_object($object);
    }

You could also add the radio button group field in init_with_object()
if it doesn't exist, or set the choices if it does:

    sub init_with_object
    {
      my($self, $object) = @_;

      my $choices = ...get $choices from $object somehow...

      # Set choices if the field already exists, otherwise add the field
      if(my $field = $self->field('my_field'))
      {
        $self->field('my_field')->choices($choices);
      }
      else
      {
        $self->add_field(my_field =>
        {
          type    => 'radio group',
          choices => $choices,
        });
      }

      # Proceed with normal init_with_object() stuff...
      $self->SUPER::init_with_object($object);
    }

-John


 
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