Laravel根据关联表条件进行查询

$keyword = $this->filters['keyword'];
$options = $this->parseOptions();
$datas = TableModel::with('hasBook')
    ->with('hasGradeCell.hasGrade')
    ->when($keyword,function($query)use($keyword){
        return $query->where('title','like','%'.$keyword.'%');
    })
    ->when($options,function ($query) use ($options){
        if (isset($options['cell_id'])) {
            return $query->where('cell_id', $options['cell_id']);
        }
        if (isset($options['grade_id'])) {
            return $query->whereHas('hasGradeCell',function ($query) use ($options){
                return $query->whereHas('hasGrade',function ($query) use ($options){
                    return $query->where('id',$options['grade_id']);
                });
            });
        }

    });
$counts            = $datas->count();

$datas = $datas->where('type', 1)
        ->orderBy($this->filters['sort'], $this->filters['sort_by'])
        ->paginate($this->filters['limit'])
        ->appends($this->filters);