entity with relationships through GWT RPC problem

Question

I am using JPA 2.0. (EclipseLink 2.0.2)

If an entity contains relations, for example:

@OneToMany(cascade = CascadeType.ALL, mappedBy = \"userId\")
p         


        

Answer 1

This error message most likely means that your "Blog" object does not implement java.util.Serializable or com.google.gwt.user.client.rpc.IsSerializable.

RPC and Serializable Discussion