文档[消息通知]部分toArray($notifiable)里的代码不理解$this->invoice来源

问答 / 102 / 2 / 创建于 2年前 / 更新于 2年前

/**
 * Get the array representation of the notification.
 *
 * @param  mixed  $notifiable
 * @return array
 */
public function toArray($notifiable)
{
    return [
        'invoice_id' => $this->invoice->id,
        'amount' => $this->invoice->amount,
    ];
}