There's mention of this problem in the hibernate docs. It has to do with the way hibernate uses proxy classes and object inheritance. The long and the short of it is that in order to get things working correctly, you need to make your domain objects implement interfaces and then tell hibernate that the mapping file describes the interface, but to instantiate classes of type InterfaceImpl.
Here's the relevant page, which I only happened to stumble across today. I have no direct experience with this problem, so I can't give you a detailed description of the solution. Sorry. Section 19.1.3 is the one that interests you, I think. http://www.hibernate.org/hib_docs/v3/reference/en/html/performance.html --sam On 3/12/06, Marc Ende <[EMAIL PROTECTED]> wrote: > Hi Andreas, > > I've tried the targetEntity but it doesn't solve the problem. What I've > forgotten to mention > is that the class "WohnungNeu" extends the class "Objekt". > > The used OneToOne relationship works perfectly. > > I've found a startingpoint. It seems to be hibernate not tapestry... > > Thanks for your help Andreas! > > Marc > > Andreas Bulling schrieb: > > Hi Marc, > > > > I'm using annotations so perhaps you have to take a look at the > > hibernate documentation to see how to define the same in the xml > > mapping file. > > > > Perhaps you have to define something similar to this: > > @ManyToMany(targetEntity = Person.class, mappedBy = "users", cascade = { > > CascadeType.PERSIST, CascadeType.REMOVE }) > > public List<Person> getPersons() > > { > > return persons; > > } > > > > The important part is the "targetEntity" definition. > > > > I hope this helps. > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
