Let's say that your current validation rules in model Contact looks like:
public $validate = array(
'street' => array(
'allowEmpty' => true,
'rule' => array('minLength', 4),
'message' => 'At least %s characters required',
),
'postcode' => array(
'allowEmpty' => true,
'rule' => array('postal', null, 'us'),
'message' => 'Invalid postal code',
),
'city' => array(
'allowEmpty' => true,
'rule' => array('minLength', 2),
'message' => 'At least %s characters required',
),
);
then you can implement beforeValidate callback in this model:
public function beforeValidate($options = array()) {
$allowEmpty = empty($this->data[$this->alias]['details']);
foreach (array('street', 'postcode', 'city') as $field) {
$this->validate[$field]['allowEmpty'] = $allowEmpty;
}
return parent::beforeValidate($options);
}
and in contact form where contact details are required just
echo $this->Form->input('Contact.details', array('type' => 'hidden',
'value' => '1'));
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