file-management-system/app/Http/Requests/StoreSubJobRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Validator;

class StoreSubJobRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array<string, \Illuminate\Contracts\Validation\Rule|array|string>
     */
    public function rules(): array
    {
        return [
            'directorat_id' => 'required|exists:directorats,id',
            'sub_directorat_id' => 'required|exists:sub_directorats,id',
            'job_id' => 'required|exists:jobs,id',
            'kode' => 'required|string|max:2|min:2|unique:sub_jobs,kode',
            'name' => 'required|string|max:50'
        ];
    }

    /**
     * Configure the validator instance.
     */
    public function withValidator(Validator $validator): void
    {
        $validator->after(function (Validator $validator) {
            if($validator->errors()->any()) {
                $error = json_decode($validator->errors()->toJson(), true);
                foreach ($error as $key => $value) {
                    flash( $value[0]);
                }

                return redirect()->route('job.index')->with('error', 'Sub Job created failed.');
            }
        });
    }
}