[英]Hibernate predicates - Invalid path
让我们拥有三个实体:Event,MessageEvent和Message。 MessageEvent是Event的子类(正确设置了DiscriminatorValue)。 MessageEvent具有一个附加属性“ message”,其类型为Message。 定义如下:
@ManyToOne(optional = false, cascade = CascadeType.REMOVE)
@JoinColumn(name = "MESAGE_ID", nullable = false)
private Message message;
现在,我们试图设置一个谓词,以查找所有消息id为2的MessageEvent-s。我们通过以下方式进行操作:
cb.equal(cb.treat(root, MessageEvent.class).join(MessageEvent_.message, JoinType.LEFT).get(Message_.id), 2)
代码编译良好,但是,我们在运行时遇到此错误:
5:40:59,891 ERROR [org.hibernate.hql.internal.ast.ErrorCounter] (default task-2) Invalid path: 'generatedAlias1.id': Invalid path: 'generatedAlias1.id'
at org.hibernate//org.hibernate.hql.internal.ast.util.LiteralProcessor.lookupConstant(LiteralProcessor.java:114)
at org.hibernate//org.hibernate.hql.internal.ast.tree.DotNode.resolve(DotNode.java:214)
at org.hibernate//org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:109)
at org.hibernate//org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:104)
at org.hibernate//org.hibernate.hql.internal.ast.HqlSqlWalker.resolve(HqlSqlWalker.java:1033)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1286)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4699)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:4169)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2134)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2084)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2084)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2084)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2084)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2059)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2059)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:813)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:607)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:311)
at org.hibernate//org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:259)
Hibernate显然在构造相应的SQL查询时遇到问题。 问题出在Hibernate本身还是我们做错了?
在https://github.com/JurajMlich/hibernate-bug-demonstration上有一个最小的演示。
在Java 8,Java 10(openjdk),Wildfly 10,Wildfly 12上进行了测试。使用eclipse链接ORM可以正确处理相同的查询。
问题在于休眠状态。 我什至在他们的错误跟踪系统中发现了该错误,并发现该错误已得到修复-https: //hibernate.atlassian.net/browse/HHH-10561 。 但是,Wildfly 12使用5.1.x。 将Hibernate升级到5.2.17之后,问题消失了。
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