How do you set Cake validation to only verify the rules IF there is
content. If the field is left blank (optional field), skip validation.
e.g.
var $validate = array(
'state' => array(
'rule' => '/^[a-z]{2}$/i', // 2 letters
'message' => 'You must enter a valid state.'
)
);
This always runs, even if the content of the field is left blank. I
want it to skip validation if the field is left blank.
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