Extbase ObjectStorage returns a hashcode. But why? - typo3

Question

I was just extending an existing Typo3 4.7 Extension with two own Model classes.
It runs quite well, Backendforms look like expected BUT when I try to access some SubObjects of my Model Classes in the templates via Object Accessor {class.subclass.attribute} I am not able to access the attribute. The problem that showed me, is that the Object for the Attribute "mainColor" for example in the Object Storage is a HashCode, which contains the Actual Object I want to access ( the object following the hashcode is the correct related object from the database ).
Does anyone of you have an Idea where the problem might be ?
If any more Code Snippets are needed, I will deliver them. But since I really don't know where the problem comes from, I prefer to not deliver a wall of Code.
Domain/Model/Cluster.php
/**
* Main Color of Cluster
* #var Tx_Extbase_Persistence_ObjectStorage<Tx_Alp_Domain_Model_ColorCombination> $mainColor
*/
protected $mainColor;
/**
* Subcolors of Cluster
* #var Tx_Extbase_Persistence_ObjectStorage<Tx_Alp_Domain_Model_ColorCombination> $subColors
*/
protected $subColors;
/**
* Constructor
* #return void
*/
public function __construct() {
$this->initStorageObjects();
}
/**
* Initializes all Tx_Extbase_Persistence_ObjectStorage properties.
* #return void
*/
protected function initStorageObjects() {
$this->subColors = new Tx_Extbase_Persistence_ObjectStorage();
$this->mainColor = new Tx_Extbase_Persistence_ObjectStorage();
}
TCA/Cluster.php
'sub_colors' => array(
'exclude' => 1,
'label' => 'Sub-Colors',
'config' => array(
// edited
'type' => 'inline',
'internal_type' => 'db',
'allowed' => 'tx_alp_domain_model_colorcombination',
'foreign_table' => 'tx_alp_domain_model_colorcombination',
'MM' => 'tx_alp_cluster_subcolorcombination_mm',
'MM_opposite_field' => 'parent_cluster',
'size' => 6,
'autoSizeMax' => 30,
'maxitems' => 9999,
'multiple' => 0,
'selectedListStyle' => 'width:250px;',
'wizards' => array(
'_PADDING' => 5,
'_VERTICAL' => 1,
'suggest' => array(
'type' => 'suggest',
),
),
),
),
Fluid Debug Output can be found here:
http://i60.tinypic.com/28kluub.jpg
Thanks for any help :(
And sorry for my bad English and this is my first question here, hope I did it right ;)

Answer 1

Unless you have a 1:1 relation from a model to a sub model, you cannot access the sub model because the sub model is an ObjectStorage.
Example:
Domain/Model/Cluster.php
/**
* Main Color of Cluster
* #var Tx_Alp_Domain_Model_ColorCombination $mainColor
*/
protected $mainColor;
This means that the Cluster model has exacly one main color (mind the annotation), this is a 1:1 relation.
Therefore using {cluster.mainColor.property} will work.
What you are doing is:
Domain/Model/Cluster.php
/**
* Main Color of Cluster
* #var Tx_Extbase_Persistence_ObjectStorage<Tx_Alp_Domain_Model_ColorCombination> $mainColor
*/
protected $mainColor;
This means that every Cluster can have multiple main colors, this is a 1:n relation. Therefore you must iterate through the mainColors (and call the property $mainColors):
<f:for each="{cluster.mainColors}" as="mainColor">
{mainColor.property}
</f:for>