Laravel - How to override the validation message?

Question

I have a Request that validates through a class Request:

The Controller:

  public function store(PagtoRequest $request)
  {
   ... resto da lógica

A Request:

namespace App\Http\Requests;


use App\Rules\ValidarValor;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Http\Request;


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



  public function rules(Request $request)
  {

    $arrayParcelas = $request->input("arrayParcelas"); // guardando no dados das percelas


    return [
      'arrayParcelas.*.vcto_parcela' => ['required','date_format:"d/m/Y"'], // verifica se as datas informadas são válidas
      'arrayParcelas.*.valor_parcela' => ['required',new ValidarValor], // verifica se os valores informados são válidos
    ];
  }

  public function messages() {
    return [
      'arrayParcelas.*.vcto_parcela.date_format' => 'Existem parcelas com datas inválidas',
      'arrayParcelas.*.valor_parcela.ValidarValor' => 'Existem parcelas com valores inválidos',
    ];
  }
}

A Rule:

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class ValidarValor implements Rule
{
  public function __construct()
  {

  }

  public function passes($attribute, $value)
  {
    // verifica se está no formato 9.999.999.999,99 e quantos milhares forem necessários.
    $expressao = "/^([1-9]{1}[\d]{0,2}(\.[\d]{3})*(\,[\d]{0,2})?|[1-9]{1}[\d]{0,}(\,[\d]{0,2})?|0(\,[\d]{0,2})?|(\,[\d]{1,2})?)$/";
    return (preg_match($expressao,$value));
  }

  public function message()
  {
    return "O campo :attribute está no formato incorreto.";
  }
}

The first rule, I can customize the error message because I use an Laravel validation rule (in the case of field validation vcto_parcela)

But in the case where I use the Rule ValidarValor, how to personalize the message?

The way I did, it doesn’t work because it’s returning to Rule’s message instead of the message I set in Request.

That is, (exemplifying if one of the portions is in incorrect format) is returning this message (coming from Rule):

O campo arrayParcelas.2.valor_parcela está no formato incorreto.

Instead of this, which I set in Request:

Existem parcelas com valores inválidos.

Of course, that’s because this isn’t right:

'arrayParcelas.*.valor_parcela.ValidarValor' => 'Existem parcelas com valores inválidos',

But how to do so to display the error message I set, when I use a Rule?

Answer 1

Analyzing the code and what the Larable us provides to validate data with customized classes What you’ve done is just the way it is, it works that way, of course there’s a way around can add functionality to this class so that when a message is passed in your constructor may have the option to use a new validation message, example:

<?php namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class ValidarValor implements Rule
{
    private $message;
    public function __construct($message = null)
    {
        $this->message = $message;
    }
    public function passes($attribute, $value)
    {
        $expressao = "/^([1-9]{1}[\d]{0,2}(\.[\d]{3})*(\,[\d]{0,2})?|[1-9]{1}[\d]{0,}(\,[\d]{0,2})?|0(\,[\d]{0,2})?|(\,[\d]{1,2})?)$/";
        return (preg_match($expressao,$value));
    }
    public function message()
    {
        return $this->message ?? 'O campo :attribute está no formato incorreto.';
    }
}

with this change made in your contructor now has the possibility to change the default message of your rule as follows:

<?php namespace App\Http\Requests;

use App\Rules\ValidarValor;
use Illuminate\Foundation\Http\FormRequest;

    class PagtoRequest extends FormRequest
    {
        public function authorize()
        {
            return true;
        }
        public function rules()
        {
            return [
                'valor_parcela' => [
                    'required', 
                     new ValidarValor('Existem parcelas com valores inválidos') // passe aqui !!!
                ]
            ];
        }

        public function messages()
        {
            // remova somente aquele validação que foi customizada na classe
            return [

            ];
        }
    }

^References

• Laravel - Validation
• How to override the message of the custom validation Rule in Laravel?