request = $request; } public function apply($builder) { $this->queryBuilder = $builder; $filters = array_filter($this->request->only($this->filters), function ($item) { return $item !== null; }); foreach ($filters as $filter => $value) { if (method_exists($this, $filter)) { $this->$filter($value, $this->queryBuilder); } } return $this->queryBuilder; } public function created_at_start($created_at_start) { $this->queryBuilder->whereDate('created_at', '>=', $created_at_start); } public function created_at_end($created_at_end) { $this->queryBuilder->whereDate('created_at', '<=', $created_at_end); } }