invoiceninja/app/Http/Requests/ExpenseCategory/UpdateExpenseCategoryRequest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Http\Requests\ExpenseCategory;

use App\Http\Requests\Request;
use App\Utils\Traits\ChecksEntityStatus;
use Illuminate\Validation\Rule;

class UpdateExpenseCategoryRequest extends Request
{
    use ChecksEntityStatus;

    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize() : bool
    {
        return auth()->user()->can('edit', $this->expense_category);
    }

    public function rules()
    {
        $rules = [];

        if ($this->input('name')) {
            // $rules['name'] = 'unique:expense_categories,name,'.$this->id.',id,company_id,'.$this->expense_category->company_id;
            $rules['name'] = Rule::unique('expense_categories')->where('company_id', auth()->user()->company()->id)->ignore($this->expense_category->id);
        }

        return $rules;
    }

    public function prepareForValidation()
    {
        $input = $this->all();

        if (array_key_exists('color', $input) && is_null($input['color'])) {
            $input['color'] = '';
        }

        $this->replace($input);
    }
}