Hi John,
So here are my thoughts on data migration.
- What you want to be able to do is patch a database with all
the changes
since some point in time, or roll-back to some point in time.
- I like the idea of MigrationOperation classes. I think these
need to be
identifiable by some
Geert Bevin gbevin at uwyn.com writes:
MetaData classes could have migrateForward/migrateBackward methods
which
contain only the most recent deltas. And some constraint-like
mechanism could
Very interesting approach, I hadn't though of using the MetaData
merging for this. I
This appears to be related to meta data merging. I was able to
recreate the
problem by taking the NewsItem class in Jumpstart and splitting out
the meta
data into its own class, just like in
http://rifers.org/wiki/display/RIFECRUD/Getting+started.
Conversely, if I
combine my classes into
