刀片 laravel 中未定义的“$qrcode”变量

Question

I'm working on a Laravel project about how to generate a QR Code with a hashed information. However, when I call the variable from my blade file, it says 'Undefined variable $qrcode'. May I get some help?

This is how my Controller (PostController) looks like:

public function index()
{
    $post = Post::all();
    return view('blog.index', compact('post'));
}

public function create()
{
    return view('blog.create');
}

public function store(Request $request)
{
    $post = new Post;
    $post->randomnumber =  random_int(100000, 999999);       
    $post->user_id = Auth::id();
    $post->unit = $request->input('unit');
    $post->guestname = $request->input('guestname');
    $post->guestphone = $request->input('guestphone');
    $post->guestemail = $request->input('guestemail');
    $post->guestic = $request->input('guestic');
    $post->guestcarplate = $request->input('guestcarplate');
    $post->numberofguests = $request->input('numberofguests');
    $post->date = $request->input('date');
    $post->time = $request->input('time');
    $post->hash = Hash::make($post->randomnumber);
    $post->save();
    return view('blog.qrcode');     
    
}


public function generate ($id)
{     
    $post = Post::findOrfail($id);        
    $qrcode = QrCode::size(300)->generate($post->hash);
    return view('blog.qrcode', compact('qrcode'));        
}

This is how my Route looks like:

Route::get('posts/create', 'PostController@create')- 
>middleware('auth');   

Route::post('posts', 'PostController@store');

Route::get('/qrcode/{id}', function ($id) {

       return redirect('blog.qrcode');

});

And this is how my blade file (qrcode.blade.php) looks like:

@extends('layouts.frontend')

@section('content')

                <h4>
                    QR Code                        
                </h4>

                 {!! $qrcode !!} 
            
@endsection                

Answer 1

try this:

Route::get('/qrcode/{id}', 'PostController@generate');

instead of:

Route::get('/qrcode/{id}', function ($id) {return redirect('blog.qrcode');});