[Flow] Copy an object

[David Sporer]

Ah ok, that’s what you meant with allow properties :D
Sorry, I think I’ve just figured it out myself.


> Am 16.04.2015 um 07:28 schrieb David Sporer <david.sporer at gmail.com>:
> 
> 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
>>> _______________________________________________
>>> Flow mailing list
>>> Flow at lists.typo3.org
>>> http://lists.typo3.org/cgi-bin/mailman/listinfo/flow
>> 
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