/** * Customize default operator input by type mapper for some types * @return array */ public function getDefaultOperatorInputByType() { if (null === $this->_defaultOperatorInputByType) { parent::getDefaultOperatorInputByType(); $this->_defaultOperatorInputByType['numeric'] = array('==', '!=', '>=', '>', '<=', '<'); $this->_defaultOperatorInputByType['string'] = array('==', '!=', '{}', '!{}'); } return $this->_defaultOperatorInputByType; }