In the Product entities the links to this DownloadGroup are deleted to keep 
it consistent (in database: a foreign key constraint). That is not the same 
as cascaded delete, where the products belonging to a DownloadGroup are 
deleted. But the link to the deleted group must be deleted from the 
products.

Somewhere in getting the Product entities you used a 'productId', but did 
not define it. Maybe in the definition of the OneToMany to Product? You 
said DownloadGroup "is ManyToOne to Product entity". Have you got the right 
OneToMany and ManyToOne? For I think *a downloadgroup can contain many 
products, but a product can only be in 1 downloadgroup?* In that case the 
Product is the owner, has a $downloadGroup field with ManyToOne to a 
DownloadGroup entitity and a DownloadGroup has a $products field with a 
OneToMany to the Product entity. From what you tell here it looks a bit the 
other way around, with a DownloadGroup having only one Product, thereby 
DownloadGroup being the owner and linking to a Product with a productId-key 
that does not exist... 


On Wednesday, 5 March 2014 23:50:36 UTC+1, Parsifal wrote:
>
>  
> I have a Download Group with just two rows: id, groupName
> This is ManyToOne to Product entity. When I want to delete a Download 
> Group standalone, I use this:
>
>               $object = $em->find('Entities\DownloadGroup', $_GET['id']);
>
>               if ($object !== null) {
>
>                   $group_name = $object->getGroupName();
>
>                   $em->remove($object);
>
>                   $em->flush();
>
>
>                   $error = false;
>
>                   $message = "Download group ($group_name) has been 
> deleted.";
>
>               } else {
>
>               
>     $error = true;
>
>                   $message = "Invalid download group.";
>
>               }
> I use getGroupName() before deleting to get the download group name to 
> prepare the message for EventLog.
> But on deleting I get E_NOTICE:
> Undefined index: productId in 
> /vendor/doctrine/common/lib/Doctrine/Common/Proxy/AbstractProxyFactory.php 
> on line 121
> productId property belongs to Product entity not to DownloadGroup. I am 
> not using cascade deletion too. the deleted download group may not have an 
> assigned product too.
> If I remove getGroupName() from code above, I won't get the notice any 
> more. But I need it for EventLog, so how can I fix that notice message that 
> is related to Product entity? please advice.Look forward to hear from you.
>  
>  
>  
>

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