README

CakePHP behavior plugin to implement optimistic locking for RDBMS.

Usage

Most simply, just load this behavior in your model.

class Post extends AppModel {
	public $actsAs = array('OptimisticLock.OptimisticLock');
}

You can specify which field to compare and error message shown in Model::validationErrors. Default will be like this.

class Post extends AppModel {
	public $actsAs = array(
		'OptimisticLock.OptimisticLock' => array(
			'field' => 'modified',
			'message' => 'Update conflict, another user has already updated the record. Please list and edit the record again.',
		),
	);
}

Id and modified timestamp must be sent from your form.

$this->Html->form->input('Post.id', array('type' => 'hidden'));
$this->Html->form->input('Post.modified', array('type' => 'hidden', 'name' => 'data[Post][opt_modified]'));