form->fill([ 'rfq_number' => $this->generateRfqNumber(), ]); } protected function generateRfqNumber(): string { $year = now()->year; $lastRfq = RequestQuotation::whereYear('created_at', $year) ->orderBy('id', 'desc') ->value('rfq_number'); if ($lastRfq) { $lastNumber = (int) substr($lastRfq, -3); $nextNumber = str_pad($lastNumber + 1, 3, '0', STR_PAD_LEFT); } else { $nextNumber = '001'; } return "C.R.I-{$year}-{$nextNumber}"; } }