Brian: I am not able to d'load the project or able to find any docs. Can u send me the pointer? ~ajitesh
-----Original Message----- From: Brian McCallister [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 21, 2004 3:03 PM To: OJB Users List Subject: Re: REPOST: OJB's support for object migration: [e.g torque table schema- how to alter existing table ] OJB doesn't transparently migrate data -- I don't know of any good high-level general purpose tool which can do that. I wrote an incremental data-migration oriented tool a while back, but it doesn't use an o/r mapping. Simple is a dependency resolver with convenience features for database migrations. http://migratosaur.dev.java.net Nothing fancy about it, but it is maintained and works well for me =) No automated schema change discovery and guesswork -- no way to *know* the intention of changes, unfortunately. Any migration requires some human integration. I can imagine a "database refactoring browser" with a drag/click-and-act/etc type thing which encapsulates the actions into a serializable thing to automate this, but to my knowledge no one has written one. -Brian On Sep 21, 2004, at 5:57 PM, Ajitesh Das wrote: > Reposting again. Let's see if anybody has any recommendation. > > -----Original Message----- > Hi List: > I like to know if anybody who uses OJB platform in his product has done > anything on object model migration. This seems to be a missing piece in > OJB project. Am I missing something? > Example Scenario: > I have an existing application that uses OJB as OR platform contains a > set of business objects. > In this new release, we are altering the definition of business object > by adding new fields for some objects and deleting some fields for > others. I would like to know how other users are handling the two > situations: (a) When you add a new field to an existing object and (b) > when you delete a field in an existing object. So that the old data can > be kept and properly defaulted. > > I have searched the Wiki ,docs and mail archive but could not find any > recommendation/reference from the OJB developers/gurus or reference to > some design patterns. > > Regds > Ajitesh > > > > --------------------------------------------------------------------- > 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
