[html-formfu] position element not found error when using insert_before

[Carl Franks]

2009/10/15 mohanprasad <mohan at thebizmo.com>:
>
> Hi,
>
> I am trying to insert a new element in my catalyst controller action using
> below code.
> i have two hidden fileds, one text box, i am trying to insert the new
> element before hidden fields.
>
> my $form = $self->form;
> my $file = "restricted/add/product";
> $form->load_config_filestem($file);
> $form->process;
> $c->stash->{form} = $form;
> my $new_element = $form->element( { type => 'Block', tag => 'label', content
> => 'file upload error' } );
> my $pos = $form->get_element({ type => 'Hidden', name => 'media_id'});
> my $hidden_fields = $form->hidden_fields;
> $c->log->debug("hidden fields = $hidden_fields");
> $form->insert_before($new_element, $pos);

Hi,

Because all the fields are attached to a Fieldset - not directly to the form,
you'll find $pos is undef.
Because of this, you also need to call insert_before() on the
fieldset, not the form.
Also, you'll find that if you're creating $new_element on the same
form, you'll end up with 2 copies of it after insert_before(), so you
should probably be using another form object to create it.

You need to do something like this:

my $fieldset = $form->get_element;
my $pos = $fieldset->get_element( 'media_id' );

my $new_element = $different_form_object->element( \%args );

$fieldset->insert_before( $new_element, $pos );

Cheers,
Carl