/**
* To use this :
* - Create your own writeSubClassNames() method
* - Your method has no parameters
* - Your method returns nothing
* - Call return writeSub('sub_class_names', 'super_class_name') using your two properties names
*
* @param $sub string sub property name ie 'sub_class_names'
* @param $super string super property name ie 'super_class_name'
*/
private function writeSub($sub, $super)
{
$written = [];
// update $super_property into new $sub_properties
foreach ($this->{$sub} as $sub) {
if (!Dao::is($this, $sub->{$super})) {
$sub->{$super} = $this;
Dao::write($sub, [Dao::only($super)]);
}
$written[Dao::getObjectIdentifier($sub)] = true;
}
// empty $super_property from removed $sub_properties
$subs = Dao::search([$super => $this], Link_Class::linkedClassNameOf($this));
foreach ($subs as $sub) {
if (!isset($written[Dao::getObjectIdentifier($sub)])) {
$sub->{$super} = null;
Dao::write($sub, [Dao::only($super)]);
}
}
}