/** * Add a "WHERE" clause to the given query. * * @param \Nova\Database\Query\Builder $query * @param string $key * @param string $extraValue * @return void */ protected function addWhere(QueryBuilder $query, $key, $extraValue) { if ($extraValue === 'NULL') { $query->whereNull($key); } elseif ($extraValue === 'NOT_NULL') { $query->whereNotNull($key); } else { $query->where($key, $extraValue); } }