【发布时间】:2016-08-16 00:05:14
【问题描述】:
我有这个简单的 Hibernate 代码。
public List<Student>bug(){
//SimpleCriteria
final Criterion eq = and(Restrictions.eq("fdl","N"),Restrictions.eq("cid",1),Restrictions.eq("did",2));
return currentSession().createCriteria(Student.class)
.createAlias("school","s",JoinType.INNER_JOIN,Restrictions.eq("zipCode",1764))
.createAlias("address","a",JoinType.LEFT_OUTER_JOIN,eq)
.setProjection(addProjection("id"))
.setResultTransformer(transformer(Student.class))
.list();
}
问题在于参数和某种混乱或混合或位置错误,当我创建两个 createAlias 时都会出现问题,两者都至少具有这样的标准(请参阅下面的更新)
createAlias 有一些条件
createAlias("school","s",JoinType.INNER_JOIN,Restrictions.eq("zipCode",1764))
createAlias("address","a",JoinType.LEFT_OUTER_JOIN,eq)
生成的sql好像不错..
select
this_.ID as y0_
from
student this_
left outer join
address address2_
on this_.C05=address2_.ID
and (
(
address2_.FDL=?
and address2_.CID=?
and address2_.DID=?
)
)
inner join
school school_
on this_.C03=school_.ID
and (
school_.C06=? //ZIPCODE
)
您可以看到邮政编码值 1764 绑定到第一个参数 address2_.FDL
binding parameter [1] as [INTEGER] - [1764]
稍后为 cid 的第二个参数分配正确的 fdl 先前值,即 'N'
Message: binding parameter [2] as [VARCHAR] - [N]
稍后,第三个参数 did 被分配了正确的 cid 先前值,即 1
binding parameter [3] as [INTEGER] - [1]
之后,四个参数 zipCode 被分配了正确的前一个值,即 2
binding parameter [4] as [INTEGER] - [2]
当然生成的sql匹配log4j绑定
select
this_.ID as y0_
from
student this_
left outer join
address address2_
on this_.C05=address2_.ID
and (
(
address2_.FDL=1764
and address2_.CID='N'
and address2_.DID=1
)
)
inner join
school school_
on this_.C03=school_.ID
and (
school_.C06=2 //ZIPCODE
)
如您所见,绑定显然是错误的。
预期现实
1 parameter fdl should be bind to 'N' but is bind to zipCode value which is 1764
2 parameter cid should be bind to 1 but is bind to fdl value which is 'N'
3 parameter did should be bind to 2 but is bind to cid value which is 1
4 parameter zipCode should be bind to 1764 but is bind to did value which is 2
我认为 Hibernate 出于某种原因混合了参数位置。
遇到此问题时,我使用的是 Hibernate 4.3.4,但我看到了一个在 5.2.2 https://hibernate.atlassian.net/browse/HHH-10991 中修复的类似错误,我升级到 Hibernate 5.2.2,同样的问题遇到了很多论坛报告这个问题为什么hibernate不能解决它?当然我有解决方法,但是这个问题很烦人
如果我使用 2 createAlias 而不是标准,一切都会像预期的那样工作
createAlias("school","s",JoinType.INNER_JOIN,Restrictions.eq("zipCode",1764))
createAlias("address","a",JoinType.LEFT_OUTER_JOIN)
环境
Java: 1.8.0_74; Java HotSpot(TM) 64-Bit Server VM 25.74-b02
Hibernate 5.2.2 and 4.3.4 tested in both.
Netbeans NetBeans IDE 8.1 (Build 201510222201)
另一个类似的论坛
https://forum.hibernate.org/viewtopic.php?f=1&t=947018
https://forum.hibernate.org/viewtopic.php?f=1&t=971534
https://hibernate.atlassian.net/browse/HHH-2496
https://hibernate.atlassian.net/browse/HHH-1743
更新
即使是2个参数,参数也会出错
public List<Student>bug(){
return currentSession().createCriteria(Student.class)
.createAlias("school","s",JoinType.INNER_JOIN,Restrictions.eq("zipCode",1764))
.createAlias("address","a",JoinType.LEFT_OUTER_JOIN,Restrictions.eq("fdl","N"))
.setProjection(addProjection("id"))
.setResultTransformer(transformer(Student.class))
.list();
}
如您所见,绑定显然是错误的。
预期现实
1 parameter fdl should be bind to 'N' but is bind to zipCode value which is 1764
2 parameter zipCode should be bind to 1764 but is bind to fdl value which is 'N'
【问题讨论】:
标签: java hibernate hibernate-5.x