prodejna/core/service.h

#ifndef SERVICE_H
#define SERVICE_H

#include <QList>
#include <QSharedPointer>

#include <odb/core.hxx>
#include <odb/transaction.hxx>
#include <odb/database.hxx>
#include <odb/result.hxx>

#include "core_global.h"
#include "context.h"

#include "transaction.h"

template<class T>
class Service
{
public:
    Service() { }

    QList<QSharedPointer<T> > all() {
        odb::database *db = Context::instance().db();

        Q_ASSERT(db);

        Transaction tx;
        odb::result<T> res = db->template query<T>();

        QList<QSharedPointer<T> > ret;
        for (typename odb::result<T>::iterator it = res.begin(); it != res.end(); it++) {
            ret.append(it.load());
        }

        tx.commit();
        return ret;
    }

    void save(QSharedPointer<T> entity) {
        odb::database *db = Context::instance().db();
        Transaction tx;
        db->persist(entity);
        tx.commit();
    }

    QSharedPointer<T> loadById(int id) {
        odb::database *db = Context::instance().db();
        Transaction tx;
        QSharedPointer<T> entity = db->template load<T>(id);
        tx.commit();
        return entity;
    }
};

#endif // SERVICE_H