[TYPO3-mvc] Problems with clearing an ObjectStorage

[Claus Due]

Hi Sebastian,

When you use getFavorites() you de-reference the variable. So, from inside the model:

$this->favorites->removeAll($this->favorites);

... and from outside:

$favorites = $object->getFavorites();
$favorites->removeAll($favorites);
$object->setFavorites($favorites);
// which is the equivalent of $object->setFavorites($this->objectManager->get('Tx_Extbase_Persistence_ObjectStorage');

... or add a method on your Model:

public function removeAllFavorites() {
	$this->favorites->removeAll($this->favorites);
}


-----
Venlig hilsen / Kind regards,

Claus Due
Fart Joke Connoisseur
http://fedext.net/



On Jun 22, 2011, at 5:06 PM, Sebastian Michaelsen wrote:

> Hi *,
> 
> i'm having a hard time with quite a simple problem. I just missed something basic or misunderstood something..
> 
> 
> I want to empty an Tx_Extbase_Persistence_ObjectStorage, because an object with an n:m property should lose all its relations.
> 
> Why can't I just call removeAll() on an ObjectStorage? The method exists, but it requires another ObjectStorage as an argument (the group of objects to be removed).
> 
> I tried:
> 
> 
> /**
> * @var Tx_Extbase_Persistence_ObjectStorage<Tx_Myext_Domain_Model_Foo> $favorites
> */
> protected $favorites;
> 
> public function removeAllFavorites() {
> 	$this->getFavorites()->removeAll($this->getFavorites());
> }
> 
> But the ObjectStorage ($this->favorites) is not empty afterwards. It clears out almost all objects, except 1. One object is always left and I don't know why.
> 
> Any hints?
> 
> Kind regards and thanks for any help,
> Sebastian
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