I'll have a look at the documentation; thanks for the link. "Robert r. Sanders" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Look at: > doc/docu/guides/basic-technique.html#Support+for+Non-Decomposed+m%3An+Mappings > in the OJB documentation. I think I was able to get something along > these lines to work in a test (pre- 1.0). I think it would be relatively > straight forward for you to implement a test and see if it works; I > would simpy mark the username as a key, and then try it. Changes to the > OJB meta-data that prevent this would be my main concern.... > > Sean Dockery wrote: > >>Hello. >> >>I've searched the gmane archives, but I was unable to find any messages >>related to my question. >> >>Suppose that I have the following classes... >> >>public class User { >> private Integer id; // primary key field >> private String username; // alternate key field >> private Collection userRoles; // collection of UserRole objects >> related by username >>}; >> >>public class UserRole { >> private String username; // foreign key >> private String rolename; >>} >> >>...and I wanted to relate User and UserRole in a repository mapping based >>on the equality of the username fields in both User and UserRole. Can >>this exact schema be handled through a repository mapping? (Does >>fk-pointing-to-this-class work without using an indirection-table? Is >>there an alternative?) >> >>Most of the rest of the data model in the application uses User.id as a >>foreign key, so we can't easily change the primary key of the user table. >>The UserRole fields were chosen for compatibility with Tomcat >>JDBCRealm-like declarative security implementations. >>The only way that I can see to work around this problem is to duplicate >>the User.id field in the UserRole table, along with the username. >> >> >> >> >>--------------------------------------------------------------------- >>To unsubscribe, e-mail: [EMAIL PROTECTED] >>For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > -- > Robert r. Sanders > Chief Technologist > iPOV > www.ipov.net
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
