Question

我需要从表中读取一行，更改值并更新此行。 Hibernate Debug-Log表示它可以工作，但是没有。更新后的数据库表条目与以前相同。

应用程序：

    public int holeNeuNummer(String sa) throws WrappedException {
        int neueNummer = 0;

        Rggsnr rggsnr;
        try {
            rggsnr = Service.selectFirst("from Rggsnr where sa='" + sa + "'");
            System.out.println("OLD: " + rggsnr);
        } catch(DatabaseException | EmptyResultException e) {
            printError(e);
            return neueNummer;
        }

        rggsnr.getId().setLfdnr(rggsnr.getId().getLfdnr() + 1);

        // updaten
        try {
            Service.update(rggsnr);
            System.out.println("NEW: " + rggsnr);
        } catch (Throwable e) {
            e.printStackTrace();
        }

        return neueNummer;
    }

输出：

OLD: Rggsnr{sa=BH, lfdnr=867}
NEW: Rggsnr{sa=BH, lfdnr=868}

更新的休眠调试日志：

08:07:12,542 DEBUG [org.hibernate.engine.transaction.spi.AbstractTransactionImpl] - begin
08:07:12,542 DEBUG [org.hibernate.engine.jdbc.internal.LogicalConnectionImpl] - Obtaining JDBC connection
08:07:12,542 DEBUG [org.hibernate.engine.jdbc.internal.LogicalConnectionImpl] - Obtained JDBC connection
08:07:12,542 DEBUG [org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction] - initial autocommit status: false
08:07:12,546 DEBUG [org.hibernate.engine.transaction.spi.AbstractTransactionImpl] - committing
08:07:12,546 DEBUG [org.hibernate.event.internal.AbstractFlushingEventListener] - Processing flush-time cascades
08:07:12,547 DEBUG [org.hibernate.event.internal.AbstractFlushingEventListener] - Dirty checking collections
08:07:12,550 DEBUG [org.hibernate.event.internal.AbstractFlushingEventListener] - Flushed: 0 insertions, 1 updates, 0 deletions to 1 objects
08:07:12,550 DEBUG [org.hibernate.event.internal.AbstractFlushingEventListener] - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
08:07:12,551 DEBUG [org.hibernate.internal.util.EntityPrinter] - Listing entities:
08:07:12,551 DEBUG [org.hibernate.internal.util.EntityPrinter] - net.oko.batch.persistence.dto.okod.Rggsnr{id=component[frei,jahr,lfdnr,sa]{frei=     , jahr=2019, sa=BH, lfdnr=868}}
08:07:12,551 DEBUG [org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction] - committed JDBC Connection
08:07:12,552 DEBUG [org.hibernate.engine.jdbc.internal.LogicalConnectionImpl] - Releasing JDBC connection
08:07:12,552 DEBUG [org.hibernate.engine.jdbc.internal.LogicalConnectionImpl] - Released JDBC Connection

更新功能：

    public static void update(Object obj) throws DatabaseException {
        Session hsession = null;

        try {
            hsession = HibernateUtil.getSessionFactory().openSession();
            Transaction htransaction = hsession.beginTransaction();
            hsession.update(obj);
            htransaction.commit();
        } catch (HibernateException ex) {
            throw new DatabaseException(ex);
        } finally {
            if (hsession != null)
                hsession.close();
        }
    }

DB2i不更新表

0 个答案: