Php 在hasManyThrough关系之后附加另一个表

我正在尝试将4个表连接在一起：

StepAnimation Model:
    public function steps()
    {
        return $this->hasManyThrough('App\Models\Step','App\Models\WorkSequence');
    }
    public function step()
    {
        return $this->belongsTo('App\Models\Step');
    }


Step Model:
    public function workSequence()
    {
        return $this->belongsTo('App\Models\WorkSequence');
    }
    public function stepAnimation()
    {
        return $this->hasMany('App\Models\StepAnimation');
    }

WorkSequence Model:
    public function categoryWorkSequence()
    {
        return $this->hasMany('App\Models\CategoryWorkSequence');
    }
    public function step()
    {
        return $this->hasMany('App\Models\Step');
    }

CategoryWorkSequence Model:
    public function workSequence()
    {
        return $this->belongsTo('App\Models\WorkSequence');
    }

我当前正在选择具有步骤动画的所有工作序列：

$this->stepAnimation = New StepAnimation();
$workSequence = $this->stepAnimation::with('step.workSequence')->get();

---

但是现在我想将所有类别附加到工作序列，我需要如何扩展“选择”以实现这一点？

然后您可以继续选择工作序列中的类别关系，只要它在您的模型上可用。像这样

$this->stepAnimation = New StepAnimation();
$workSequence = $this->stepAnimation::with('step.workSequence.categoryWorkSequence')->get();