Propel - merge collection - collections

Question

Working with Propel ORM 1.5, I'm missing a method to merge two PropelCollections.
A short proposal may be :
public function mergeCollection($collection){
foreach($collection as $i => $item){
if( ! $this->contains($item)){
// append item
$this->append($item);
}
}
}
So I'm new to Propel I would like to ask you, if there are better ways to do it ?
Or is this functionality already included in Propel, but i didn't yet discovered it ?

Answer 1

It seems to have been discuted twice in the mailing list, but I can't find the ticket.
At least, you can try this code and/or open a ticket on Github.
/**
* Add a collection of elements, preventing duplicates
*
* #param array $collection The collection
*
* #return int the number of new element in the collection
*/
public function addCollection($collection)
{
$i = 0;
foreach($collection as $ref) {
if ($this->add($ref)) {
$i = $i + 1;
}
}
return $i;
}
/**
* Add a an element to the collection, preventing duplicates
*
* #param $element The element
*
* #return bool if the element was added or not
*/
public function add($element)
{
if ($element != NULL) {
if ($this->isEmpty()) {
$this->append($element);
return true;
} else if (!$this->contains($element)) {
set_error_handler("error_2_exception");
try {
if (!method_exists($element, 'getPrimaryKey')) {
restore_error_handler();
$this->append($element);
return true;
}
if ($this->get($element->getPrimaryKey()) != null) {
restore_error_handler();
return false;
} else {
$this->append($element);
restore_error_handler();
return true;
}
} catch (Exception $x) {
//il semble que l'element ne soit pas dans la collection
restore_error_handler(); //restore the old handler
$this->append($element);
return true;
}
restore_error_handler(); //restore the old handler
}
}
return false;
}
}
function error_2_exception($errno, $errstr, $errfile, $errline,$context) {
throw new Exception('',$errno);
return true;
}