Config injection

[MelchiorKokernoot]

I have been working on a poc where I am injecting config values through constructor arguments, like so:

class Foo implements AutowiresConfigs{
    public function __construct(
        public StringConfig $appName,
    ){}
}

This will automatically inject the value of config('app.name') into $appName.
I have also created a way to do this with annotations like so:

class Foo implements AutowiresConfigs{
    public function __construct(
        #[StringConfig('app.name')]
        public StringConfig $appName,
    ){}
}

currently the behaviour is only triggered on classes that extend AutowiresConfigs but it is also possible to get here for any class.
Finally I have also found a way to do this with primitive types, so:

class Foo implements AutowiresConfigs{
    public function __construct(
        public string$appName,
    ){}
}

The package can be found here for further inspection, but I am really interested what the general opinion is about this. Should I create a PR so this is supported by the framework?

Kind regards,

Melchior

[bram-pkg]

How does this work for config files with values like foo-bar.key-one?

[henzeb]

That's where the annotations come in, I guess?

[MelchiorKokernoot]

Absolutely! Annotations fully support these keys, and from the package perspective, the callback that should be used to resolve the config key could also be made configurable, with a sensible default of course that is.

[Radiergummi]

I would remove the name-based resolution and go forward with the attributes; that's exactly the stuff they were incorporated into the language for, and looks very Laravel-y to me!

[MelchiorKokernoot]

Thanks for your reply! I am going to submit my PR as soon as possible and will stick to the attribute way, because it is less 'magicky'.

[joelharkes]

Cool! i think this would be a great default Laravel feature. I was looking for it but couldn't find it in the documentation anywhere.

It would make components even more testable.

[henzeb]

It is in Laravel 11. Taylor presented it at Laracon US. https://laravel.com/docs/11.x/container#contextual-attributes