Hi,

I writing an extension which has to be available for all subclassess of page and page itself. So in that s the way I extend the page class:Object::add_extension('Page', 'ProductExtension');

ProducExtension has a db-field (buyable=>Boolean)

with updateCMSFields I add a checkbox field to the field list. It's now displayed in every subclass of page. But I can not save it.
Extending the subclasses too is working if i do not extend class page...

any sugestions? thx in advance

Can you post your extension code (remove or generalise anything sensitive of course)?

hej,

that's the generalized code, the many_many relation is working fine...

class ProductExtension extends DataExtension {

	private static $db=array(
		'Byable'=>'Boolean'
	);
	private static $many_many=array(
		'OptionSets'=>'OptionSet'
	);
	public function updateCMSFields(FieldList $fields) {
		$gridFieldConfig = GridFieldConfig_RecordEditor ::create()->addComponents(
			new GridFieldOrderableRows('SortID')
	  	);
		$optionSetsGridField = new GridField("OptionSets", "OptionSets", $this->owner->OptionSets()->sort('SortID'), $gridFieldConfig);
		$fields->addFieldToTab('Root.Shop',new CheckboxField('Buyable','Verkaufbar'));
		$fields->addFieldToTab('Root.Shop',$optionSetsGridField);
   	}
}