After extending NEWS with a new date field, how can I list from this news field

Question

I have extended NEWS with a new date field (eventStartDate) and I would like to list all news with this date greater than X.

At this moment, the WHERE clause checks tx_news_domain_model_news.datetime not my new field tx_news_domain_model_news.eventStartDate.

This is what I get

 whereClause => '(tx_news_domain_model_news.datetime >= '1551200578' 
 AND tx_news_domain_model_news.pid IN ('123456')) 
 AND (tx_news_domain_model_news.type='Tx_SLNewsExtended_News')'

This is what I would like

 whereClause => '(tx_news_domain_model_news.eventStartDate>= '1551200578' 
 AND tx_news_domain_model_news.pid IN ('123456')) 
 AND (tx_news_domain_model_news.type='Tx_SLNewsExtended_News')'

I set

settings.datefield = eventStartDate

with no effect.

I'im using NEWS 6.3 with TYPO3 7.6

Answer 1

Returns empty string in NEWS 6.3

public function getDateField()
{
    if (empty($this->dateField) || in_array($this->dateField, ['datetime', 'archive'])) {
        return $this->dateField;
    } else {
        return '';
    }
}

Ok with NEWS 7.0

public function getDateField()
{
    if (in_array($this->dateField, ['datetime', 'archive'])
        || isset($GLOBALS['TCA']['tx_news_domain_model_news']['columns'][$this->dateField])) {
        return $this->dateField;
    }
    return '';
}