[Flow] Copy an object

[David Sporer]

Thank you Carsten.
I’ve tried your suggestion but it’s not yet working because if I create the connected objects like you suggested it gives me an error:
„It is not allowed to map property „0“. You need to use $propertyMappingConfiguration->allowProperties(‚0‘) to enable mapping of this property.“

This happens because the first entry of the array has index 0 which seems to be a problem.

Can you help?

Regards,
David

> Am 15.04.2015 um 09:40 schrieb Carsten Bleicker <carsten at bleicker.de>:
> 
> 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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> 
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