Better support for displaying and resolving Casted Enum

[sebastiaands]

• Laravel Version: 9.8.1
• Nova Version: 4.2.2
• PHP Version: 8.1.4
• Database Driver & Version: MySQL 8
• Operating System and Version: MacOS 12.3.1
• Browser type and version: Google Chrome 100

Description:

When casting a property to a PHP 8.1 enum (see https://laravel.com/docs/9.x/releases#enum-casting), a Nova Select field cannot be used. This leads to the following error:

exception: "InvalidArgumentException"
file: "/var/www/html/vendor/symfony/http-foundation/InputBag.php"
line: 70
message: "Excepted a scalar, or an array as a 2nd argument to \"Symfony\\Component\\HttpFoundation\\InputBag::set()\", \"App\\Enums\\PostType\" given."

This used to work in Laravel Nova 3.x.

Detailed steps to reproduce the issue on a fresh Nova installation:

• Create a model with a property that casts to an enum
• Try to make this property editable in Nova using a Select field

[crynobone]

Please provide full reproducing repository.

[zek]

Same happens for Badge field.

[beebmx]

The problem is the expected value, and enums returns an object.
For the moment, and to fix it you can use this:

use App\Enums\Status;
use Illuminate\Support\Collection;

Select::make('Status')
    ->options(
        Collection::make(Status::cases())->mapWithKeys(fn ($status) => [$status->value => $status->value])
    )->resolveUsing(fn($status) => $status->value
    )->displayUsing(fn($status) => $status->value)

The important points is resolveUsing and displayUsing

[KnudH]

I think this is not working anymore.
I tried exactly what you did, and I'm getting error:
Attempt to read property "value" on string"

Ironically I though: okay cool, so let's use this string and get the Enum with from and then return the value
MyEnum::from($status)->value

But this gives me error
Object of class App\Enums\MyEnum could not be converted to string

So its a string or its a enum? Nobody knows...

In the documentation of nova the world "enum" is not even mentioned. 1 year after php 8.1 with enums is released. That should be fixed in my opinion.

[crynobone]

If you have an issue or a bug submit a new "bug report" with reproducing code.

FYI Laravel Nova 4 supports Enum partially because even if we support PHP 8.1 we still maintain support for PHP 7.3 and 7.4.