1

我正在使用以下字段注释:

@Id
@TableGenerator( name = "comment_sequence", pkColumnValue = "comment_sequence" )
@GeneratedValue( strategy = GenerationType.TABLE, generator = "comment_sequence" )
private Long id_comment;

创建表的sql是:

CREATE TABLE hibernate_sequences ( sequence_name VARCHAR(255) NOT NULL, next_val bigint, PRIMARY KEY ( sequence_name ) );
INSERT INTO hibernate_sequences VALUES ( 'comment_sequence', 1 );

但是实体根本就没有持久化。知道会发生什么吗?我对上面提供的代码做错了吗?


编辑:

我在原帖中压制了一些信息,对不起(半夜问几乎睡着了=/)。

实体正在正确创建,如果我将策略更改为SEQUENCE并添加 SQLCREATE SEQUENCE hibernate_sequence一切正常(它是持久的),但我想使用该TABLE策略将每个表序列保持在hibernate_sequences.

我唯一的例外是TransactionRolledbackException由于NullPointerException集成测试中的测试失败引起的。没有明确说明它为什么不插入数据。

使用时我得到以下休眠输出hibernate.show_sql = true

...

12:38:48,753 INFO  [stdout] (pool-5-thread-1) Hibernate: 
12:38:48,754 INFO  [stdout] (pool-5-thread-1)     insert 
12:38:48,755 INFO  [stdout] (pool-5-thread-1)     into
12:38:48,756 INFO  [stdout] (pool-5-thread-1)         cm_comment
12:38:48,757 INFO  [stdout] (pool-5-thread-1)         (cd_status, ds_message, dt_alt, dt_inc, id_user_alt, id_user_inc, id_problem, id_comment) 
12:38:48,758 INFO  [stdout] (pool-5-thread-1)     values
12:38:48,759 INFO  [stdout] (pool-5-thread-1)         (?, ?, ?, ?, ?, ?, ?, ?)

12:38:48,766 INFO  [stdout] (pool-5-thread-1) Hibernate: 
12:38:48,766 INFO  [stdout] (pool-5-thread-1)     select
12:38:48,767 INFO  [stdout] (pool-5-thread-1)         commentent0_.id_comment as id1_6_,
12:38:48,768 INFO  [stdout] (pool-5-thread-1)         commentent0_.cd_status as cd2_6_,
12:38:48,770 INFO  [stdout] (pool-5-thread-1)         commentent0_.ds_message as ds3_6_,
12:38:48,771 INFO  [stdout] (pool-5-thread-1)         commentent0_.dt_alt as dt4_6_,
12:38:48,772 INFO  [stdout] (pool-5-thread-1)         commentent0_.dt_inc as dt5_6_,
12:38:48,773 INFO  [stdout] (pool-5-thread-1)         commentent0_.id_user_alt as id6_6_,
12:38:48,774 INFO  [stdout] (pool-5-thread-1)         commentent0_.id_user_inc as id7_6_,
12:38:48,775 INFO  [stdout] (pool-5-thread-1)         commentent0_.id_problem as id8_6_ 
12:38:48,776 INFO  [stdout] (pool-5-thread-1)     from
12:38:48,777 INFO  [stdout] (pool-5-thread-1)         cm_comment commentent0_ 
12:38:48,778 INFO  [stdout] (pool-5-thread-1)     where
12:38:48,779 INFO  [stdout] (pool-5-thread-1)         commentent0_.id_problem=?

12:38:48,840 ERROR [org.jboss.arquillian.protocol.jmx.JMXTestRunner] (pool-5-thread-1) 
...

 java.lang.AssertionError: expected:<1> but was:<0>  

...

我不确定这是否相关,但在之前的测试中我得到了错误:

12:50:36,510 INFO [org.jboss.as.ejb3] (pool-4-thread-1) JBAS014101: Failed to find SFSB instance with session ID {[-98, -17, -32, -33, 63, 107, 74, 59, -76, -127, -19, 29, 24, 45, -50, 5]} in cache

当我在运行应用程序后更改postgresql.conflog_statement = 'all'签入pg_log目录时,我看不到任何日志。所以我不确定如何启用该选项。

我还在使用 Arquillian、arquillian 持久性 API 和 JBoss 托管实例进行集成测试。我将更新标签,因为这可能与其中任何一个有关。

4

1 回答 1

2

您的“声明”TableGenerator没有给出关于它应该查看/使用哪个表的任何信息,您给它的只是一个 pkColumn 名称......

尝试:

@TableGenerator( name = "comment_sequence", table = "hibernate_sequences", pkColumnName = "sequence_name", valueColumnName = "next_val", pkColumnValue = "comment_sequence", allocationSize=1)

allocationSize=1应该可能大于 1 ...当您验证它正在工作时。(最后,如果您使用此策略并将大量生成器放入数据库中的同一个表中,请注意潜在的锁定问题 - 如果您的应用程序正在创建“大量”实体。)

于 2013-03-03T20:03:13.367 回答