Hey guys,

I´ve working with many_many_extraFields to generate TextFields in related DataObjects.
But after setting the extraFields, I can´t call the variables in the related object (like: $this->ID, $this->Title).

MyParent.php

class MyParent extends DataObject{
	private static $db = array(
		"Title" => "Varchar(255)"
	);

	static $many_many = array(
		'MyChildren' => 'MyChild'
	);

	public static $many_many_extraFields = array(
        'MyChildren' => array('Foo' => 'Varchar(255)')
    );

	public function getCMSFields(){
		$fields = parent::getCMSFields();
		
		$config = GridFieldConfig_RecordEditor::create();
		$childrenFields = singleton('MyChild')->getCMSFields();
        $childrenFields->addFieldToTab('Root.Main', TextField::create('ManyMany[Foo]', 'Foo'));
		$config->getComponentByType('GridFieldDetailForm')->setFields($childrenFields);

		$gridfield = new GridField("MyChildren", "MyChild", $this->MyChildren(), $config);
		
		$fields->addFieldToTab("Root.Main", $gridfield);




		return $fields;
	}
}

MyChild.php

class MyChild extends DataObject{
	private static $db = array(
		"Title" => "Varchar(255)"
	);

	private static $belongs_many_many = array(
		"MyParents" => "MyParent"
	);

	public function getCMSFields(){
		$fields = parent::getCMSFields();
		$fields->addFieldToTab("Root.Main", new LiteralField("Foo", $this->ID));
		return $fields;
	}
}

Has anyone a solution or a workaround?