Hi,

I followed advices and how to's here about adding buttons and functions inside the cms. What i want to do is basically copy values from a set of dataojbects and create a new set of data objects using those values, as a duplication.
So i used getCMSactions. I set up in my page type a function like this

    
 function  getCMSActions(){
      
     $actions = parent::getCMSActions();
     $Action = new FormAction("doAction", "Import values");
     $actions->push($Action);
      
     return $actions;
  }

Then I created a CMSActionDecorator.

<?php
 class CMSActionDecorator extends LeftAndMainDecorator {
    

       function doAction(){
			
		$id = (int)$_REQUEST['ID'];
		
	
		$thisPage = DataObject::get_one('MyPage', 'ID ='. $id);
		$group = DataObject::get_one('MyPageGroup', 'ID =' . $thisPage->ParentID);
		$generalvaluespage= DataObject::get_one('GeneralValuesPage', 'Name = ' .$group->Title);
		$dataObjectToBeDuplicated = DataObject::get('DataObjectToBeDuplicated' , "CategoryID =". $generalvaluespage->ID);
		
		foreach($dataObjectToBeDuplicated as $do){
		
			$newDataObject = new MyDataObject;
			$newDataObject->Value1 = $do->Value1;
			$newDataObject->Value2 = $do->Value2;
			$newDataObject->write();
    }
		
			
	
        FormResponse::status_message(sprintf('All good!'),'good');
        return FormResponse::respond();
    } 
}

Then I added the extension line on _config as usual: Object::add_extension('CMSMain', 'CMSActionDecorator');
THis is not working. An error messagge inside the CMS says "SERVER ERROR". If i erase eveything except the request lines, it seems to be workin (no error messages, just the All Good green one). Anyone has clues?
I used this tutorial http://www.ssbits.com/adding-a-cms-action-the-slightly-hacky-way/
Thanks

I've discovered a couple of mistakes. Still not working. The wrong part is actually the part in which I try to access the dataobjects, the dataobject ceration itself works. I can avoid the first Get, since having the ID of the page I can even have in the same way the ParentID. so:

      function doAction(){
			
		$id = (int)$_REQUEST['ID'];
		$parentid = (int)$_REQUEST['ParentID'];

What is not working is the DataObject::get or get_one part that acts on the pages (I know because i've made lots of tests). The get or get one is working only if no where conditions are inserted? why??