/**
* Generate SQL from filter
*
* @return array
*/
public function filter_sql()
{
if ($this->filter instanceof mr_html_filter) {
return $this->filter->sql();
}
return array('1 = 1', array());
}
/**
* Render mr_html_filter
*
* @param mr_html_filter $filter mr_html_filter instance
* @return string
*/
protected function render_mr_html_filter(mr_html_filter $filter)
{
// Only render the filter form if one of the filters is not hidden
foreach ($filter->get_filters() as $mrfilter) {
if (!$mrfilter instanceof mr_html_filter_hidden) {
return html_writer::tag('div', $filter->init()->get_helper()->buffer(array($filter->get_mform(), 'display')), array('class' => 'mr_html_filter'));
}
}
return '';
}
