Re:MongoDB queries don’t always return all matching documents
by PeterisP on Wednesday June 08, 2016 @08:26AM
(#11861723)
In such a scenario, none of the apps "own" the data - the DB is a primary source of truth and consistency is enforced there instead of relying that the code in the many apps will match.
Application logic can undergo active changes and refactoring without changes to the data permanent storage, indeed, a 1-to-1 correspondence between DB and application data structures isn't expected. It's just as with backwards compatibility with file formats, changing the application version shouldn't require incompatible in-place changes to the backing data persistence layer - you can need to add some new features, but the old version of the app should work fine with the updated DB.
Application logic can undergo active changes and refactoring without changes to the data permanent storage, indeed, a 1-to-1 correspondence between DB and application data structures isn't expected. It's just as with backwards compatibility with file formats, changing the application version shouldn't require incompatible in-place changes to the backing data persistence layer - you can need to add some new features, but the old version of the app should work fine with the updated DB.