public function relativeDateFilter($field, $fromUnit = self::RELATIVE_DATE_FILTER_UNIT_MINUTES, $fromInterval, $toUnit = self::RELATIVE_DATE_FILTER_UNIT_MINUTES, $toInterval = 0, $dateFormat = self::RELATIVE_DATE_FILTER_DATEFORMAT, $isNegative = false) {
		$parameters = array(
	        'fromUnit' => $fromUnit,
	        'fromInterval' => $fromInterval,
	        'toUnit' => $toUnit,
		    'toInterval' => $toInterval,
		    'dateFormat' => $dateFormat,
		    'field' => $field
	    );
	    $this->addFilter(null, self::RELATIVE_DATE_FILTER, $isNegative, $parameters);
		return $this;
	}