Dropdown list with dyanmic optgroup

Question

Hi there cakephp experts! I am looking for you help on a dyanmic dropdown list with dyanamic optgroup. Suppose I have two tables:

 countries:  id, country_na         


        

Answer 1

bind tableB to tableA in tableA model, do

$hasMany = array("tableB"=>array("className"=>"tableB","foreignKey"=>"aId"));

then use

find("all")

might need

$this->tableA->recursive->2

right before find