public static function editField($id, $value, $productId) { $stock = Stock::findOne($id); if ($productAmount = $stock->getProducts()->where(['product_id' => $productId, 'stock_id' => $id])->one()) { $productAmount->amount = $value; $productAmount->save(); } else { $productAmount = new StockToProduct(); $productAmount->amount = $value; $productAmount->product_id = $productId; $productAmount->stock_id = $id; $productAmount->save(); } }