如何从关系表中获取ID，Laravel

我有4个表：Users，CompanyRegister，VoucherDetails，Addvoucher。因此，“身份验证用户ID”将在companyRegister表中作为user_id提交，然后companyRegister ID将在Voucherdetails表中作为company_id提交，最后voucherDetails ID将在addVoucher表中作为voucher_ID提交。我是新手，也是雄辩的，我不明白为什么我不能从voucherdetails获取ID并在addvoucher中提交，但是我可以从companyregister获取ID并以voucherdetails在company_id中提交。我正在使用相同的方法获取ID，但无法正常工作，希望在这里获得解决方案和解释，谢谢！！

我的用户模型

public function companyregisters()
    {
         return $this->hasOne('App\companyregisters');
    }

public function voucherdetails()
{
     return $this->hasMany('App\voucherdetails');
}

 public function addvoucher()
{
     return $this->hasMany('App\addvoucher');
}

public function roles()
{
    return $this->belongsToMany('App\role');
}

public function hasAnyRoles($roles)
{
    if($this->roles()->whereIn('name', $roles)->first()){
        return true;
    }
    return false;
}

  public function hasRole($role)
{
    if($this->roles()->where('name', $role)->first()){
        return true;
    }
    return false;
}

我的公司注册模型

public function User(){
         return $this->belongsTo('App\User');
    }

public function voucherdetails()
{
     return $this->hasMany('App\voucherdetails');
}

我的优惠券详细模型

  public function User(){
     return $this->belongsTo('User');
}


public function companyregisters(){
     return $this->belongsTo('App\companyregisters');
}

    public function addvoucher()
{
     return $this->hasOne('App\addvoucher');
}

我的附加代金券模型

    public function User(){
     return $this->belongsTo('App\User');
}

public function voucherdetails(){
     return $this->belongsTo('App\voucherdetails');
}

我的voucherdetailsController

         public function store(Request $request){
    
    $voucherdetail = new voucherdetails();

    $voucherdetail->title = $request->input('title');
    $voucherdetail->description = $request->input('description');
    $voucherdetail->user_id = Auth::user()->id;

    $id = Auth::user()->id;
    $user      = User::find($id);
    $company   = $user->companyregisters;
    $companyId = $company->id;

    $voucherdetail->company_id = $companyId;

    $voucherdetail->save();
    
    return redirect()->to('addvoucher');
        
    }

我的addvoucherController

        public function store(Request $request){

    $addvoucher = new addvoucher();

    $addvoucher->voucherTitle = $request->input('voucherTitle');
    $addvoucher->voucherCode = $request->input('voucherCode');
    $addvoucher->user_id = Auth::user()->id;

//Here(the voucherdetails id cant get to submit in voucher_id)

    $id = Auth::user()->id;
    $user      = User::find($id);
    $voucher   = $user->voucherdetails;
    $voucherID = $voucher->id;

    $addvoucher->voucher_id = $voucherID;

    $addvoucher->save();
    
    return redirect()->to('displayVouchers');

}