[Flow] Copy an object

[Carsten Bleicker]

i think you can not solve this in a generic way.
nobody knows if your application needs to just create a new collection of related objects
or do you need to copy each single collection item also.

maybe you could try to get the properties you need for the copy project as a simple array.
and use the converter features to convert this array into a new object.

f.e.

class CopyService {

	/**
	* @var \TYPO3\Flow\Property\PropertyMapper
	* @Flow\Inject
	*/
	protected $propertyMapper;

	/**
	* @var \TYPO3\Flow\Property\PropertyMappingConfigurationBuilder
	* @Flow\Inject
	*/
	protected $propertyMappingConfigurationBuilder;

	/**
	* @param FooObject $object
	* @return FooObject
	*/
	public function copyFooWithSameBarReferences(FooObject $object){
		$properties = ObjectAccess::getGettableProperties($object);

		// maybe $object->bars contains collection of Baz
		// and you want to use the same relations for the new object, just add their identifiers to the new collection
		$properties['bars'] = [];
		while($bar = $object->getBars()->current()){
			$properties['bars'][] = $this->persistenceManager->getIdentifierByObject($bar);
			$object->getBars()->next();
		}

		// Configure what is allowed to map from $properties etc.
		// Note: its incomplete at this point
		$configuration = $this->propertyMappingConfigurationBuilder->build();
		$configuration->allowAllProperties();

		return $this->propertyMapper->convert($properties, FooObject::class, $configuration);
	}

	/**
	* @param FooObject $object
	* @return FooObject
	*/
	public function copyFooWithNewBarReferences(FooObject $object){
		$properties = ObjectAccess::getGettableProperties($object);

		// maybe $object->bars contains collection of Baz
		// and you want to use the same relations for the new object, just add their identifiers to the new collection
		$properties['bars'] = [];
		while($bar = $object->getBars()->current()){
			$properties['bars'][] = ObjectAccess::getGettableProperties($bar);
			$object->getBars()->next();
		}

		// Configure what is allowed to map from $properties etc.
		// Note: its incomplete at this point
		$configuration = $this->propertyMappingConfigurationBuilder->build();
		$configuration->allowAllProperties();

		return $this->propertyMapper->convert($properties, FooObject::class, $configuration);
	}

}




> Am 15.04.2015 um 08:45 schrieb David Sporer <david.sporer at gmail.com>:
> 
> Hi,
> 
> I have a fairly complex model and I want to create a copyAction in my controller that basically duplicates the object.
> My first approach was to simply clone the original object with clone().
> The problem with this however is that the references to resources and other collections remain the same.
> If I clear collections of the copied resource the collection of the original resource is also cleared which I don’t want.
> Same thing for resources. Deleting the original object fails because the resource is referenced by the new object also.
> 
> Do you have any best practices for doing such a thing?
> One approach that I guess would work is creating the copied object from scratch and also manually duplicating all connected objects but that wouldn’t be that easy and I guess there must be an easier way.
> 
> Thanks,
> David
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