GET Data empty in Laravel - laravel

Question

Hi I am new to Laravel and so far I made good progress. Right now my head is blocked now and I need some direction or help, please.
I am getting data from radio button but GET Data is empty. I need to fill-in this data (pay) into an exist DB and I am getting "Creating default object from empty value" and I agree with Laravel :) I guess, my lack of knowledge is blocking me here.
Thanks.
This is the GET and POST data
GET Data empty
POST Data
_token = "72nrnI7Y7xuIQJe6LZPLGLzNsAv6ZZbY29zkjcIr"
pay = "CC"`
This is the Model
namespace App;
use Illuminate\Database\Eloquent\Model;
use DB;
use Auth;
class DAddress extends Model
{
protected $table='dAddress';
protected $fillable = ['payment_method'];
public function createPay()
{
$user = Auth::user();
$order = $user->daddress()->create([
'payment_method' => paymentMethod()
]);
}
}
This is the Controller
public function paymentMethod(Request $request) {
$address->payment_method = $request->pay;
DAddress::createPay();
Cart::destroy();
return redirect('abc');
}
This is where I get the HTML data
<form action="{{url('/paymentMethod')}}" method="post">
<input type="hidden" value="{{csrf_token()}}" name="_token"/>
<div class="form-group">
<div class="col-md-6">
<!-- First name -->
<input type="radio" class="form-control" name="pay"
value="CC"><i class="fa fa-credit-card"></i> Credit Card
<br> <br>
<input type="radio" class="form-control" name="pay"
value="PP"><i class="fa fa-paypal"></i> Paypal
<br> <br>
<input type="radio" class="form-control" name="pay"
value="BT"><i class="fa fa-university"></i> Bank Transfer
</div>
</div>
<input type="submit" class="btn btn-primary" value="Move to Last Page" />
This is the User.php I added below function.
public function daddress()
{
return $this->hasMany(DAddress::class);
}

Answer 1

i do not understand what you are trying to do with this line $address->payment_method = $request->pay;
when you say $address->payment_method, what is the $address object holding and where is payment_method you are trying to access, why not do something like this $payment_method = $request->pay, except is you are setting $payment_method as a global variable

Answer 2

if you are using the laravel create method you could do something like this $payment_method= App\createPay::create(['payment_method' => $request->pay]);
else you could instantiate you model like
$pay =createPay();
$pay->payment_method=$request->pay;
$pay->save();
i would have love you logic to be in the controller, i would have done something like this in my controller
public function createPay(Request $request){
$user = Auth::user();
$id=$user->id;
$payment=createPay::find($id);
$payment->payment_method=$request->pay;
$payment->save();
return redirect('abc');
}
i used laravel eloquent here, that is if you want to update a record, i don't know if this is close to what you want.