ldc-legaulois/app/Http/Requests/UpdateOcbBreeder.php

<?php

namespace App\Http\Requests;

use Illuminate\Validation\Rule;

class UpdateOcbBreeder extends StoreOcbBreeder
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return array_merge(parent::rules(), [
            'breeder_code' => 'required|string|min:2|max:50,|unique:ocb_breeders,breeder_code,' . $this->breeder->id,
            'picture' => [
                Rule::requiredIf(!$this->breeder->picture),
                'image', 'mimes:jpeg,png,jpg', 'max:2048'
            ]
        ]);
    }
}