ldc-crm/app/Http/Requests/Bo/Brands/UpdateBrandRequest.php

<?php

namespace App\Http\Requests\Bo\Brands;

class UpdateBrandRequest extends StoreBrandRequest
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules(): array
    {
        /** @var integer $brandModelKey */
        $brandModelKey = request()->route()->parameter('brand')->getKey();
        $rules         = [
            'name'   => [
                'required',
                "unique:brands,name,$brandModelKey",
                'string',
                'min:5',
                'max:255',
            ],
            'domain' => [
                'required',
                "unique:brands,domain,$brandModelKey",
                'string',
                'min:5',
                'max:255',
            ],
        ];
        return \array_merge(
            parent::rules(),
            $rules,
        );
    }
}