PHP Laravel 5.6.39 - "Essayer d'obtenir la propriété d'un non-objet" en essayant de visualiser une facture sur l'application

Salut les gars, voici ma première question sur le débordement de pile.

Je reçois le message d'erreur suivant:

Essayer d'obtenir la propriété d'un non-objet

Lorsque j'essaie de consulter une facture remboursée dans le système. Toute aide est très appréciée! Merci beaucoup!

Voici le code complet du fichier:

$package_custom = PackagesCustomPrices::where('package_id','=',$invoice->booking->package->id)->where('slot_id','=',$get_slot->id)->first();

La ligne de code qui contient l'erreur est ci-dessous: p >

   <?php

namespace App\Http\Controllers;

use App\Addon;
use App\Invoice;
use App\Package;
use Illuminate\Support\Facades\DB;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;

use App\PackagesCustomPrices;
use App\BookingSlot;
use App\BookingTime;
use App\Booking;

use Dompdf\Dompdf;

use App\Exports\InvoiceExport;
use Excel;


class AdminInvoicesController extends Controller
{

    /*
    |--------------------------------------------------------------------------
    | Admin Invoices Controller
    |--------------------------------------------------------------------------
    |
    | This controller is responsible for providing invoices views to admin.
    |
    */

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function export()
    {
        return Excel::download(new InvoiceExport, 'invoices.xlsx');
    }


    public function index()
    {

        $invoices = Invoice::select('invoices.*', 'bookings.first_name as first_name', 'bookings.last_name as last_name', 'bookings.id as booking_id', 'bookings.phone as phone')
                    ->join('bookings', 'bookings.id', 'invoices.booking_id')
                    ->where('invoices.archived', 0)->with('booking')->get();
        return view('invoices.index', compact('invoices'));
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        $invoice = Invoice::findOrFail($id);

        //get package and addons
        $package = Package::find($invoice->booking->package->id);
        $addons = DB::table('addon_booking')->where('booking_id', '=', $invoice->booking_id)->get();

    //    $package_custom = PackagesCustomPrices::where('package_id','=',$invoice->booking->package->id)->first();

        $exp_booking = explode(" - ",$invoice->booking->booking_time);

        list($month,$day,$year) = explode('-', $invoice->booking->booking_date);
        $timestamp = mktime(0, 0, 0, $month, $day, $year);
        $event_date =  date('d-m-Y', $timestamp);

        //get day name to select slot timings
        $timestamp_for_event = strtotime($event_date);
        $today_number = date('N', $timestamp_for_event);        

        $its_holiday = BookingTime::where('today_is','=',$invoice->booking->booking_date)->first();
        if(isset($its_holiday->id))
        {
            $today_number = $its_holiday->id;
        }

        $get_slot = BookingSlot::where('opening','=',trim($exp_booking[0]))->where('closing','=',trim($exp_booking[1]))->where('booking_time_id','=',$today_number)->first();

        $package_custom = PackagesCustomPrices::where('package_id','=',$invoice->booking->package->id)->where('slot_id','=',$get_slot->id)->first();

        if(isset($package_custom->price))
        {
            $total = $package_custom->price;
        }
        else
        {
            $total = $package->price;
        }

        $invoice->booking->package->price = $total;
        //calculate total

        //add addons price if any
        // foreach($addons as $addon)
        // {
        //     $total = $total + Addon::find($addon->addon_id)->price;
        // }

        if($invoice->promo_discount)
        {
            $coupon = \App\CouponCode::where('code', $invoice->promo_used)->first();
            if($coupon->extra_items == 0){
                if($invoice->promo_discount)
                {
                    $discount = ($invoice->promo_discount / 100) * $total;
                    $total = $total - $discount;
                }

                foreach($addons as $addon)
                        {
                            $total = $total + Addon::find($addon->addon_id)->price;
                        }
            }
            else{

                foreach($addons as $addon)
                {
                    $total = $total + Addon::find($addon->addon_id)->price;
                }

                if($invoice->promo_discount)
                {
                    $discount = ($invoice->promo_discount / 100) * $total;
                    $total = $total - $discount;
                }
            }
        }
        else{
            foreach($addons as $addon)
            {
                $total = $total + Addon::find($addon->addon_id)->price;
            }
        }

        // print_r($total);

        // if($invoice->promo_discount)
        // {
        //     $discount = ($invoice->promo_discount / 100) * $total;
        //     $total = $total - $discount;
        // }

        // print_r($discount);
        // print_r($total);
        // exit();

        if(!$invoice->promo_discount && config('settings.enable_gst'))
        {
            $gst_amount = round(( config('settings.gst_percentage') / 100 ) * $total, 2);
        }

        else if($invoice->promo_discount && config('settings.enable_gst'))
        {
            if(config('settings.paypal_processing_fee') && $invoice->payment_method == __('app.paypal')){
                $total = $invoice->amount - (float) config('settings.paypal_processing_fee');
                // print_r($total);
                $gst_amount = round(( config('settings.gst_percentage') / 100 ) * $total, 2);
            }
            elseif (config('settings.stripe_processing_fee') && $invoice->payment_method == __('app.credit_card')) {
                $total = $invoice->amount - (float) config('settings.stripe_processing_fee');
                // print_r($total);
                $gst_amount = round(( config('settings.gst_percentage') / 100 ) * $total, 2);
            }
        }

        else
        {
            $gst_amount = 0;
        }
        // exit();

        return view('invoices.view', compact('invoice','gst_amount', 'total', 'discount'));
    }

    public function print($id)
    {
        $invoice = Invoice::findOrFail($id);

        //get package and addons
        $package = Package::find($invoice->booking->package->id);
        $addons = DB::table('addon_booking')->where('booking_id', '=', $invoice->booking_id)->get();


    //    $package_custom = PackagesCustomPrices::where('package_id','=',$invoice->booking->package->id)->first();

        $exp_booking = explode(" - ",$invoice->booking->booking_time);

        list($month,$day,$year) = explode('-', $invoice->booking->booking_date);
        $timestamp = mktime(0, 0, 0, $month, $day, $year);
        $event_date =  date('d-m-Y', $timestamp);

        //get day name to select slot timings
        $timestamp_for_event = strtotime($event_date);
        $today_number = date('N', $timestamp_for_event);        

        $its_holiday = BookingTime::where('today_is','=',$invoice->booking->booking_date)->first();
        if(isset($its_holiday->id))
        {
            $today_number = $its_holiday->id;
        }


        $get_slot = BookingSlot::where('opening','=',trim($exp_booking[0]))->where('closing','=',trim($exp_booking[1]))->where('booking_time_id','=',$today_number)->first();



                $package_custom = PackagesCustomPrices::where('package_id','=',$invoice->booking->package->id)->where('slot_id','=',$get_slot->id)->first();        


        if(isset($package_custom->price))
        {
            $total = $package_custom->price;
        }
        else
        {
            $total = $package->price;
        }
        //calculate total
        $invoice->booking->package->price = $total;

        //add addons price if any
        foreach($addons as $addon)
        {
            $total = $total + Addon::find($addon->addon_id)->price;
        }

        if($invoice->promo_discount)
        {
            $discount = ($invoice->promo_discount / 100) * $total;
            $total = $total - $discount;
        }

        if(config('settings.enable_gst'))
        {
            $gst_amount = round(( config('settings.gst_percentage') / 100 ) * $total, 2);
        }
        else
        {
            $gst_amount = 0;
        }

        // instantiate and use the dompdf class
        // print_r(base_path() . "/vendor/autoload.php");

        require base_path() . "/vendor/autoload.php";

        $dompdf = new Dompdf();
        $dompdf->set_option('isHtml5ParserEnabled', true);

        $view_hello = view('invoices.print', compact('invoice','gst_amount', 'total', 'discount'));  

        $dompdf->loadHtml(utf8_decode($view_hello));

        // (Optional) Setup the paper size and orientation
        $dompdf->setPaper('A4', 'portrait');

        // Render the HTML as PDF
        $dompdf->render();

        // Output the generated PDF to Browser
        $dompdf->stream("welcome.".date("ymdhis").".pdf", array("Attachment"=>0));


        //return view('invoices.view', compact('invoice','gst_amount', 'total', 'discount'));        
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        $invoice = Invoice::find($id);

        $invoice->update([
            'is_paid' => 1
        ]);

        return redirect()->route('invoices.index');
    }


    public function delete_all(Request $request)
    {
        $values = explode(',', $request->delete_values);

        // print_r($values);
        // exit();

        foreach ($values as $value) {
            if($value === null || empty($value)){
                continue;
            }
                $invoice = Invoice::findorFail($value);

                $booking = Booking::find($invoice->booking_id);
                if($booking){
                    $booking->addons()->detach();
                    $booking->delete();
                }


                //delete event if google calendar sync is enabled
                if(config('settings.sync_events_to_calendar') && config('settings.google_calendar_id') && $booking->google_calendar_event_id != NULL)
                {
                    try {
                        //remove google calendar event
                        $event = Event::find($booking->google_calendar_event_id);
                        $event->delete();
                    } catch(\Exception $ex) {
                        //do nothing
                    }
                }

                $invoice->delete();
        }

        Session::flash('booking_deleted', __('backend.invoice_deleted'));
        return redirect()->route('invoices.index');
    }

}