fix: add return statement & delete fmt Errorf with piece

backend/handlers/order_handler.go

@@ -121,3 +121,33 @@ func GetAllOrders(c *gin.Context) {
 
 	c.JSON(http.StatusOK, orders)
 }
+
+func UpdateOrderStatus(c *gin.Context) {
+	orderID := c.Param("id")
+
+	var req struct {
+		Status string `json:"status" binding:"required"`
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Не указан статус заказа"})
+		return
+	}
+
+	if req.Status != "new" && req.Status != "packed" && req.Status != "delivered" && req.Status != "cancel" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Неверно указанный статус заказа"})
+	}
+
+	result := database.DB.Model(&models.Order{}).Where("id = ? ", orderID).Update("status", req.Status)
+	if result.Error != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Ошибка при изменении статуса заказа"})
+		return
+	}
+
+	if result.RowsAffected == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Заказ не найден"})
+		return
+	}
+
+	c.JSON(http.StatusAccepted, "Статус заказа успешно изменен")
+}