Map, OneToMany, join table or @ManyToMany does not work ------------------------------------------------------- Key: ANN-120 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-120 Project: Hibernate Annotations Type: Improvement

Components: binder Versions: 3.1beta6 Environment: Hibernate 3.1 RC1, Annotations 3.1b6, Java 1.5.0_05 Reporter: Mattias Arbin Assignee: Emmanuel Bernard Fix For: 3.2.0.cr1 Attachments: KeyValue.java, KeyValue2.java, MyEntity.java, MyEntity2.java, TestKeyValue.java, TestKeyValue2.java Seems like there is a problem with mapping a Map using join table. I have a relation like this: @OneToMany(cascade=CascadeType.ALL) @MapKey(name="name") public Map<String, KeyValue> getProps() { return props; } The correct tables are created and inserting data works fine. When loading, however, I get the error below. When using a join column, everything works fine: @OneToMany(cascade=CascadeType.ALL) @MapKey(name="name") @JoinColumn(name="myentity_id") public Map<String, KeyValue> getProps() { return props; } Attached the two test classes. The error: ... Hibernate: select this_.id as id3_0_ from test_MyEntity this_ Hibernate: select props0_.MyEntity_id as MyEntity1_1_, props0_.props_id as props2_1_, props0_.name as formula0_1_, keyvalue1_.id as id2_0_, keyvalue1_.val as val2_0_, keyvalue1_.name as name2_0_ from test_MyEntity_KeyValue props0_ left outer join test_KeyValue keyvalue1_ on props0_.props_id=keyvalue1_.id where props0_.MyEntity_id=? 15:11:49,078 WARN JDBCExceptionReporter:71 - SQL Error: 1054, SQLState: 42S22 Exception in thread "main" 15:11:49,078 ERROR JDBCExceptionReporter:72 - null, message from server: "Unknown column 'props0_.name' in 'field list'" org.hibernate.exception.SQLGrammarException: could not initialize a collection: [test.data.MyEntity.props#1] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:65) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.loader.Loader.loadCollection(Loader.java:1923) at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:71) at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1565) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86) at org.hibernate.collection.AbstractPersistentCollection.readElementByIndex(AbstractPersistentCollection.java:161) at org.hibernate.collection.PersistentMap.get(PersistentMap.java:127) at test.TestKeyValue.test(TestKeyValue.java:43) at test.TestKeyValue.main(TestKeyValue.java:57) Caused by: java.sql.SQLException: null, message from server: "Unknown column 'props0_.name' in 'field list'" at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1876) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1098) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1192) at com.mysql.jdbc.Connection.execSQL(Connection.java:2051) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1496) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:137) at org.hibernate.loader.Loader.getResultSet(Loader.java:1676) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:223) at org.hibernate.loader.Loader.loadCollection(Loader.java:1916) ... 10 more