Hello, I have to correct my code because I work with a second level cache in the following case (1-N bidirectional). Suppose we have a Container class type, with a Set<Item>, and an Item class type. In the Hibernate mapping we make the Set non-inverse. For persistence of the Item instances we only have to add them to the Container instance's Set, and I do not have to set the Container reference in the Item instance. When an Item is inserted in the database table, the Item-persister.dehydrate method skips the Container reference in the Item instance, and takes the Long which is there because of the BackrefPropertyAccessor$BackrefGetter.getForInsert() method. This will be the foreign key in the row. The Item-persister.getPropertyInsertability()=[true,true,false,true] for example, and the method Item-persister.dehydrate knows about it: The false means: skip the Container reference in the Item instance, and the llast true means: take this number (instead). My question is: Why does the Item-persister.disassemble not take into account the Hibernate mapping? Because it does not, I have to make a correction in my code to set the Container reference in the Item instances, only for the second level cache. Thanks. _______________________________________________ hibernate-dev mailing list hibernate-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev