lithium\data\source\Database::_constraints PHP Method

    protected function _constraints(array $constraints)
    {
        foreach ($constraints as &$value) {
            if (is_string($value)) {
                $value = (object) $this->name($value);
            } elseif (is_array($value)) {
                $value = $this->_constraints($value);
            }
        }
        return $constraints;
    }