[6.x] Allow formatting an implicit attribute using a closure

[themsaid]

This PR adds a setImplicitAttributesFormatter method to the validator that allows the instance to output a message that says:

age at line 1 must be an integer

instead of

0.age must be an integer

validator(
    [['age' => 'thirty']],
    ['*.age' => 'integer']
)->setImplicitAttributesFormatter(function ($attribute) {
    [$line, $attribute] = explode('.', $attribute);

    return sprintf('%s at line %d', $attribute, $line + 1);
})->validate();

[GrahamCampbell]

You can keep the typehint (callable $formatter = null)

[MarceauKa]

Hi @themsaid , I'm just reading the 6.13 changelog. Can you help me to understand this new behavior with a real case usage? 😇

[PovilasKorop]

Hi @themsaid! Great feature it seems, I want to shoot a video about it, but I don't understand - is it possible to use it with FormRequest classes? Or what would be the syntax with $this->validate() in Controller?

[themsaid]

@PovilasKorop You'll want to use:

function withValidator($validator){
    $validator->setImplicitAttributesFormatter(function ($attribute) {
        [$line, $attribute] = explode('.', $attribute);

        return sprintf('%s at line %d', $attribute, $line + 1);
   });
}

@MarceauKa the example above is a real use case :)

[PovilasKorop]

@themsaid thanks, it's working, tried it with a bit changed example, will shoot a video tomorrow.
For anyone else, here's the code:

class StoreOrderRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'customer_name' => 'required',
            'products.*.product_id' => 'required',
        ];
    }

    function withValidator($validator){
        $validator->setImplicitAttributesFormatter(function ($attribute) {
            [$field, $line] = explode('.', $attribute);
            if ($field == 'products') {
                return 'product number ' . ($line+1);
            }
        });
    }
}

[ankurk91]

I made it working like in Laravel 8.x

    public function withValidator(Validator $validator)
    {
        $validator->setImplicitAttributesFormatter(function ($attribute) {
            return Str::of($attribute)->afterLast('.');
        });
    }

This is a hidden gem.