fix length type varchar for purchase vehicle_number

internal/modules/purchases/services/purchase.service.go

@@ -10,6 +10,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	commonRepo "gitlab.com/mbugroup/lti-api.git/internal/common/repository"
 	commonSvc "gitlab.com/mbugroup/lti-api.git/internal/common/service"
@@ -46,7 +47,8 @@ type PurchaseService interface {
 }
 
 const (
-	priceTolerance = 0.0001
+	priceTolerance                 = 0.0001
+	purchaseVehicleNumberMaxLength = 15
 )
 
 type purchaseService struct {
@@ -1158,6 +1160,15 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 		if payload.VehicleNumber != nil {
 			val := strings.TrimSpace(*payload.VehicleNumber)
 			if val != "" {
+				if utf8.RuneCountInString(val) > purchaseVehicleNumberMaxLength {
+					return nil, utils.BadRequest(
+						fmt.Sprintf(
+							"vehicle_number for item %d must be at most %d characters",
+							payload.PurchaseItemID,
+							purchaseVehicleNumberMaxLength,
+						),
+					)
+				}
 				vehicleNumber = &val
 			} else {
 				clearVehicle = true