Added support for saving receipts.

core/core.pro

@@ -144,6 +144,8 @@ OTHER_FILES += \
     users/metaData.json \
     roles/metaData.json
 
+CONFIG(debug, release|debug):DEFINES += _DEBUG
+
 win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../qdecimal/lib/ -lqdecimal -ldecnumber
 else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../qdecimal/lib/ -lqdecimal -ldecnumber
 else:unix: LIBS += -L$$OUT_PWD/../qdecimal/lib/ -lqdecimal -ldecnumber

core/service.h

@@ -67,7 +67,7 @@ public:
         return ret;
     }
 
-    void save(QSharedPointer<T> entity) {
+    virtual void save(QSharedPointer<T> entity) {
         if (!checkPermission(PERM_ADD)) {
             return;
         }
@@ -93,7 +93,7 @@ public:
         emit dataChanged();
     }
 
-    void update(QSharedPointer<T> entity) {
+    virtual void update(QSharedPointer<T> entity) {
         if (!checkPermission(PERM_EDIT)) {
             return;
         }

core/transaction.cpp

@@ -9,6 +9,9 @@ Transaction::Transaction()
     if (!Transaction::m_inTransaction)
     {
         m_tr = new odb::transaction(Context::instance().db()->begin());
+#ifdef _DEBUG
+        m_tr->tracer(odb::stderr_tracer);
+#endif
         Transaction::m_inTransaction = true;
     }
     else