通过数据的Laravel通知

我试图通过laravel中的通知传递关系对象。我有可以有很多医生的诊所，也有只能属于一家诊所的医生。他们通过医生表上的外来id字段作为机构id连接。当有人创建医生时，他们通常同时创建机构。然而，他们也有可能通过选择表格选择现有的做法

当有人创建一个新的实践时，我可以将$doctor和$practice完美地传递给通知。但是当他们选择一个现有的实践时，我似乎不能调用现有的$practice来通过。这是我的密码：

新医生通知书

医生控制器

改变

到

当您创建一个新的实践时，您将整个实践对象发送给您的通知，但当它已经存在时，您只发送id

return (new MailMessage)
    ->subject('MedReps Doctor Registration')
    ->line('Hello,')
    ->line('A new doctor has been registered:')
    ->line(' ')
    ->line($this->practice->name)
    ->line($this->practice->address)
    ->line(
        $this->practice->city
        . ', '
        . $this->practice->state
        . '  '
        . $this->practice->zip
    )
    ->line('Phone: ' . $this->practice->phone)
    ->line('Fax: ' . $this->practice->fax)
    ->line('Contact: ' . $this->practice->contact)
    ->line('Email: ' . $this->practice->email)
    ->line(' ')
    ->line(
        $this->doctor->first_name
        . ' '
        . $this->doctor->last_name
        . ', '
        . $this->doctor->type
    )
    ->line('NPI: ' . $this->doctor->npi)
    ->line('License: ' . $this->doctor->license)
    ->line($dea_line);

// If the practice already exists
if ($request->create_doctor_practice_type == 'existing') {
    $doctor = new Doctor();
    $doctor->practice_id = $request->practice;
    ... data ...
    $doctor->save();

    // Get Practice information for notification
    $practice = Practice::select('id')
        ->where('id', $request->practice)
        ->first();

    // Send notification
    Notification::route('mail', 'jeremy@medrepsrx.com')
        ->notify(new NewDoctor($doctor, $practice));

// Create a new practice
} else {
    $practice = new Practice();
    ... data ...
    $practice->save();

    $doctor = new Doctor();
    ... data ...
    $doctor->save();

    // Send notification
    Notification::route('mail', 'jeremy@medrepsrx.com')
        ->notify(new NewDoctor($doctor, $practice));
}

$practice = Practice::select('id') ->where('id', $request->practice) ->first();

$practice = Practice::find($request->practice);