Import form fields and columns from one model to another

extended_activerecord.php

<?php
class Extended_ActiveRecord extends Db_ActiveRecord{
	
	public function import_column_definitions(Db_ActiveRecord $model, $context=null){
		My_Helper::import_column_definitions($model, $this, $context);
	}
	
	public function import_form_field_definitions(Db_ActiveRecord $model, $context=null, $force_tab=null){
		My_Helper::import_form_field_definitions($model, $this, $context, $force_tab);
	}
}

my_helper.php

<?php
class My_Helper{
	
	public static function import_column_definitions(Db_ActiveRecord $source, Db_ActiveRecord $destination, $context=null){
		$columns = $source->get_column_definitions($context);
		foreach($columns as $column){
			$tmp_column = $destination->define_column($column->dbName, $column->displayName);
			$column_properties = get_object_vars($column);
			foreach($column_properties as $key => $value){
				$tmp_column->$key = $value;
			}
		}
	}
	
	public static function import_form_field_definitions(Db_ActiveRecord $source, Db_ActiveRecord $destination, $context=null, $force_tab=null){
		$source->init_columns_info($context)->define_form_fields($context);
		$form_elements = $source->form_elements;
		foreach($form_elements as $form_element){
			$tmp_field = $destination->add_form_field($form_element->dbName);
			$form_properties = get_object_vars($form_element);
			foreach($form_properties as $key => $value){
				$tmp_field->$key = $value;
			}
			if(strlen($force_tab) != 0){
				$tmp_field->tab($force_tab);
			}
			$destination->{$form_element->dbName} = $source->{$form_element->dbName};
		}
	}
	
}