[Solar-talk] Validating a checkbox

[Clay Loveless]

On Aug 1, 2007, at 10:31 PM, Clay Loveless wrote:

> I'll keep messing around; I think there's a solution possible by  
> checking the options for the checkbox. Would also be nice to come  
> up with a checkbox-group validation, along the lines of "at least  
> two of these 5 boxes must be checked".


For the time being, here's what I've come up with. In my  
'Foo_App_Registration' application, I have a public method called  
'validChecked':



     public function validChecked($value, $checked_option = null)
     {
         return ($value == 1 || $value == $checked_option);
     }



Then, in the same class, in a method that defines the full  
registration form, the checkbox with a label saying "I agree to the  
Terms and Conditions" is defined like this:



'members[terms_agreement]' => array(
     'type' => 'checkbox',
     'label' => $this->locale('LABEL_TERMS_AGREEMENT'),
     'valid' => array(
         array('callback', $this->locale('VALID_NOTCHECKED'), array 
($this, 'validChecked'))
     ),
),


... the form will fail validation if the checkbox is not checked.

To take advantage of the optional "options" array for a checkbox  
definition (as described [here][]), validChecked can also compare the  
value to a passed $checked_option parameter ... aka what the value  
should be if the checkbox is actually checked. Like so:


'members[t_and_c_agreement]'    => array(
     'type' => 'checkbox',
     'label' => $this->locale('LABEL_T_AND_C_AGREEMENT'),
     'options' => array('y', 'n'),
     'valid' => array(
         array('callback', $this->locale('VALID_NOTCHECKED'), array 
($this, 'validChecked'), 'y')
     ),
),


Voilá -- not as intuitive as I'd prefer, but seems to be working in  
my initial testing and gets the job done for the time being.

-Clay


[here]: http://solarphp.com/manual/Form_processing/Set_form_elements

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