protected function calculateAdditionalFiltersData(& $filters)
	{
		if (!empty($this->additional_filters_data)) {
			foreach ($this->additional_filters_data as $f => $src) {
				if (isset($src['query'])) {
					$filters[$f] = $this->query->pdo->query($src['query'])->fetchColumn();
				}
			}
		}
	}
protected function calculateAdditionalFiltersData(& $filters)
	{
		if (!empty($this->additional_filters_data)) {
			foreach ($this->additional_filters_data as $f => $src) {
				if (isset($src['query'])) {
					$filters[$f] = $this->query->pdo->query($src['query'])->fetchColumn();
				}
			}
		}
	}
protected function calculateAdditionalFiltersData ( & $ filters ) { if ( ! empty ( $ this -> additional_filters_data ) ) { foreach ( $ this -> additional_filters_data as $ f => $ src ) { if ( isset ( $ src [ 'query' ] ) ) { $ filters [ $ f ] = $ this -> query -> pdo -> query ( $ src [ 'query' ] ) -> fetchColumn ( ) ; } } } }
Calculate additional filter data.

@param $filters Filters to populate with additional data.
@return Nothing.
Calculate additional filter data .