Improved transaction handling.

core/service.h

@@ -12,6 +12,8 @@
 #include "core_global.h"
 #include "context.h"
 
+#include "transaction.h"
+
 template<class T>
 class Service
 {
@@ -23,7 +25,7 @@ public:
 
         Q_ASSERT(db);
 
-        odb::transaction tx(db->begin());
+        Transaction tx;
         odb::result<T> res = db->template query<T>();
 
         QList<QSharedPointer<T> > ret;
@@ -37,14 +39,14 @@ public:
 
     void save(QSharedPointer<T> entity) {
         odb::database *db = Context::instance().db();
-        odb::transaction tx(db->begin());
+        Transaction tx;
         db->persist(entity);
         tx.commit();
     }
 
     QSharedPointer<T> loadById(int id) {
         odb::database *db = Context::instance().db();
-        odb::transaction tx(db->begin());
+        Transaction tx;
         QSharedPointer<T> entity = db->template load<T>(id);
         tx.commit();
         return entity;