var $validate = array(
'end_date' => array(
'comparison' => array('rule'=>array('field_comparison', '>',
'start_date'), 'allowEmpty'=>true),
),
);
function field_comparison($check1, $operator, $field2) {
foreach($check1 as $key=>$value1) {
$value2 = $this->data[$this->alias][$field2];
if (!Validation::comparison($value1, $operator, $value2))
return false;
}
return true;
}
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