Build system changed to Cmake, ORM changed to QxORM, Qt6 compatibility.

camp/campshopitem.cpp

@@ -1,8 +1,9 @@
 #include "campshopitem.h"
 
 CampShopItem::CampShopItem(QObject *parent)
-    :ShopItem(parent)
+    :IShopItem(parent)
 {
+    m_id = 0;
     m_unitPrice = QDecDouble(0);
     m_vatType = Enums::NONE;
 }
@@ -47,12 +48,12 @@ void CampShopItem::setVatType(const Enums::VatType &vatType)
     m_vatType = vatType;
 }
 
-int CampShopItem::id()
+long CampShopItem::id()
 {
     return m_id;
 }
 
-void CampShopItem::setId(int id)
+void CampShopItem::setId(long id)
 {
     m_id = id;
 }