laravel关联关系

获取无限极子集

  //获取子集
    public function children()
    {
        return $this->hasMany(MindType::class, 'parent_id', 'id')->with('children');
    }

获取无限极父级

  //获取父级
    public function parent()
    {
        return $this->belongsTo(MindType::class, 'parent_id',)->with('parent');
    }