/** * Filter by due date * * @access public * @param string $date ISO8601 date format * @return TaskFilter */ public function filterByDueDate($date) { $this->query->neq(Task::TABLE . '.date_due', ''); $this->query->neq(Task::TABLE . '.date_due', 0); $this->query->notNull(Task::TABLE . '.date_due'); return $this->filterWithOperator(Task::TABLE . '.date_due', $date, true); }