Is there a request/validation rule that would throw an error in case of unexpected input?

Question

Something like Request::only() that throws an error if there is any extra/unexpected field in the request?

E.g.:

$request->strictly(['username', 'password']);

that would throw an error if POST request contains fields 'username', 'password', and 'foo'?

In case there isn't, what would be the best way to perform such a verification manually?

Jignesh Joisar · Accepted Answer · 2021-09-15T09:10:47.877

2

You can create your own strictly method in the request class using Macro

AppServiceProvider.php and inside boot method add this method

use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;

public function boot()
{
     Request::macro('strictly', function(array $paramaters) {
       $array = array_diff(request()->keys(), $paramaters);
        if (count($array) > 0) {
            throw ValidationException::withMessages(
                collect($array)->map(function ($row) {
                    return [$row => 'not needed'];
                })->collapse()->all()
            );
        }
      });
}

Now You can use this method inside the controller or request class

request()->strictly(['username', 'password']);

edited Sep 15 '21 at 09:10

answered Sep 15 '21 at 08:40

Jignesh Joisar

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Thank you! I think it could be simplified a bit using array_diff(), like `if (count(array_diff(request()->keys(),$parameters)) > 0)) { throw...` – Your Common Sense Sep 15 '21 at 08:45
@YourCommonSense you can edit this answer. – Jignesh Joisar Sep 15 '21 at 08:46
@YourCommonSense i updated my answer with throw a message – Jignesh Joisar Sep 15 '21 at 09:11
This is a good solution. At what point would you do that if you're using a FormRequest validation? Can it go in the `after()` method, or will that not work because it's already been passed through the `rules()` method at that point? – Ari Cooper-Davis May 05 '23 at 13:41

Is there a request/validation rule that would throw an error in case of unexpected input?

1 Answers1