Question

我有以下实体：

@Entity
@Table(name="accounts")
public class AccountEntity extends TimestampAbstractEntity {

    @Id
    @GeneratedValue(strategy= GenerationType.AUTO)
    @Column(name = "id")
    private int id;

}

TimestampAbstractEntity：

@MappedSuperclass
public abstract class TimestampAbstractEntity implements Serializable{

    @Column(name = "created_at", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date createdAt;

    @Column(name = "updated_at", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date updatedAt;

    public Date getCreatedAt() {
        return createdAt;
    }

    @PrePersist
    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public Date getUpdatedAt() {
        return updatedAt;
    }

    @PreUpdate
    public void setUpdatedAt(Date updatedAt) {
        this.updatedAt = updatedAt;
    }
}

Session中的delete方法根本不起作用，甚至没有显示日志。我尝试使用

解决方法

getCurrentSession().createQuery(delete from yadada where id=:id).setInteger("id", id).executeUpdate();

日志弹出弹出但数据库中没有任何反应，我使用的是hibernate-core 5.1.0.Final

我的配置是：

Configuration configuration = new Configuration();

            configuration.setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
            configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
            configuration.setProperty("hibernate.current_session_context_class", "thread");
            configuration.setProperty("hibernate.id.new_generator_mappings", "false");
            configuration.setProperty("hibernate.show_sql", "true");

            configuration.addAnnotatedClass(AccountEntity.class);

            StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties());
            return configuration.buildSessionFactory(builder.build());

Answer 1

请你试试以下内容，告诉我你得到了什么结果？

public void deleteAccount(SessionFactory sessionFactory, Integer entityId) {
    Session session = sessionFactory.getCurrentSession();
    session.getTransaction().begin();
    AccountEntity account = session.get(AccountEntity.class, entityId);
    session.delete(account);
    session.getTransaction().commit();
    session.getTransaction().begin();
    account = session.get(AccountEntity.class, entityId);
    System.out.println(account); //Should be null!
    session.getTransaction().rollback();
}

或者如果您想使用查询：

public void deleteAccount(SessionFactory sessionFactory, Integer entityId) {
    Session session = sessionFactory.getCurrentSession();
    session.getTransaction().begin();
    session.createQuery("delete from AccountEntity where id=:id").setInteger("id", id).executeUpdate();
    session.getTransaction().commit();
    session.getTransaction().begin();
    account = session.get(AccountEntity.class, entityId);
    System.out.println(account); //Should be null!
    session.getTransaction().rollback();
}

Hibernate不会删除，@ PrePersist和@PreUpdate

1 个答案: