Form.php

    static::applyFilter('find', function($self, $params, $chain) {
      // Check if we're finding forms linked to a test
      if (isset($params['options']['conditions']['test_id'])) {
        $test_id = (int)$params['options']['conditions']['test_id'];
        $params['options']['joins'] = array(new Query(array(
          'source' => 'test_forms',
          'constraint' => array ('Form.id' => 'test_forms.form_id', 'test_forms.test_id' => $test_id),
        )));
        unset($params['options']['conditions']['test_id']);
      }

      $data = $chain->next($self, $params, $chain);
      if ($data instanceof Record || $data instanceof RecordSet) {
        $data->setLockStatus();
      }
      return $data;
    });