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	/** Sets what should happen to values of this property if the owning peanut is deleted 
	* If not set, nothing happens. If set to 'd' the delete will cascade to the property values.
	* If set to 'c' the the owning peanut can only be deleted if the property has no values.
	* If set to 'v' (verify) the user interface should verify the recursive delete with the user first.
	* 	(in versions earlier then 2.0 this was not implemented)
	*/
	function setOnDelete($letter) {
		if ($letter !== null && strPos('dvc', $letter) === false)
			trigger_error('onDelete letter not recognised', E_USER_WARNING);
		$this->onDelete = $letter;
	}
Copyright (c) MetaClass, 2003-

This code is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This code is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

Click here for a copy of the license or see http://www.gnu.org/licenses/ .