列类型的奇怪Hibernate异常

Question

我得到Hibernate异常:

错误的列类型.发现:位,预期:BOOLEAN DEFAULT TRUE

我有班级用户:

package mypackage;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;

@Entity
@Table(name = "USER")
public class User {

   @Id
   @GeneratedValue
   @Column(name = "ID", unique = true, nullable = false)
   private Long id;

   @Column(name = "STATUS", columnDefinition = "BOOLEAN DEFAULT TRUE", 
                               nullable = false)
   private Boolean status = Boolean.TRUE;

   // getters and setters
}

如果Hibernate在数据库中创建表本身,这可以正常工作.什么时候

<property name="hibernate.hbm2ddl.auto">create</property>

要么

<property name="hibernate.hbm2ddl.auto">create-drop</property>

但如果

1. 我运行我的程序并允许Hibernate创建此表
2. 然后我将值更改hibernate.hbm2ddl.auto为验证

3. 然后我用Hibernate生成的表再次运行我的程序

   <property name="hibernate.hbm2ddl.auto">validate</property>
   

所以我得到了例外:

org.hibernate.HibernateException:dbtest.user中列STATUS的列类型错误.发现:位,预期:BOOLEAN DEFAULT TRUE

任何想法Hibernate的这种行为的原因是什么,我该如何解决它？

我用MySQL server 5.1和Hibernate 4.0.1.

我的Run班级只有两行:

 public class Run {

   public static void main(String[] main) {

     SessionFactory sessionFactory = 
                new AnnotationConfiguration().configure().buildSessionFactory();

     Session session = sessionFactory.getCurrentSession();
   }
 }

表的结构:

CREATE TABLE USER (
    ID BIGINT(20) NOT NULL AUTO_INCREMENT,
    STATUS TINYINT(1) NOT NULL DEFAULT 1,
    PRIMARY KEY (ID),
    UNIQUE INDEX ID (ID)
)
COLLATE='utf8_general_ci'
ENGINE=MyISAM
ROW_FORMAT=DEFAULT
AUTO_INCREMENT=2

我的hibernate.cfg:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://127.0.0.1:3306/dbtest</property>
    <property name="connection.username">root</property>
    <property name="connection.password">root</property>

    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="current_session_context_class">thread</property>
    <property name="connection.pool_size">5</property>
    <property name="hibernate.transaction.flush_before_completion">true</property>
    <property name="hibernate.transaction.auto_close_session">true</property>
    <property name="hibernate.hbm2ddl.auto">validate</property>
    <property name="hibernate.show_sql">false</property>
    <property name="hibernate.format_sql">true</property>
    <property name="hibernate.use_sql_comments">false</property>
    <property name="hibernate.connection.charSet">true</property>

    <mapping class="mypackage.User"/>
  </session-factory>
</hibernate-configuration>

Hibernate使用类型创建表,TINYINT我不介入数据库,也不要手动对表进行任何更改!我只是改变hibernate.hbm2ddl.auto了validate而没有别的.

Answer 1

private Boolean status = Boolean.TRUE;

应该会产生默认值 true 。

解决此问题的另一种方法是使用：

@PrePersist
public void prePersist()
{
    if ( status == null )
    {
         status = Boolean.TRUE;
    }
}