Built-in input validation rule for enum values

[SeinopSys]

When validating user input you may want to ensure that a value in the request comes from a list of supported values. This list has been made easier to define with PHP 8.1 in the form of native enums, more specifically backed enums:

enum Suit: string
{
    case Hearts = 'H';
    case Diamonds = 'D';
    case Clubs = 'C';
    case Spades = 'S';
}

If I want to validate that a property in the request body matches one of these values, I can currently do that with the Rule::in validation like so:

Rule:in(array_column(Suit::cases(), 'value'))

This gets all the cases for the enum, then collects their value properties in an array, which is compatible with Rule::in's existing behavior. I'd like to request that this be added as a less verbose validation method, for example:

Rule:enumValue(Suit::class)

This would allow the property to be either 'H', 'D', 'C' or 'S'. It would work in a similar way for int type backed enums.

[dvigueras]

If this feature request is accepted I can send a PR with the changes needed.

[JurianArie]

https://github.com/laravel/framework/releases/tag/v8.69.0 added an Enum validation rule

[SeinopSys]

Thank you, looks like #39437 implemented this already, this is great news!

[marcoaureliocardoso]

Enum Validation Rules only works with the BackedEnum Interface
https://laracasts.com/index.php/index.php/discuss/channels/laravel/enum-validation-rules-only-works-by-backedenum-interface

[henzeb]

You can use my package to add from/tryFrom to your enums you'd like to validate.

https://packagist.org/packages/henzeb/enumhancer