On 8/4/06, Bjørn Stabell <[EMAIL PROTECTED]> wrote: > > Just a question; how does this compare pros and cons with single-table > inheritance, used in Rails? See: > > http://twelvelabs.com/singletable/index.html
http://www.objectmatter.com/vbsf/docs/maptool/ormapping.html Check out the section on Horizontal Mapping vs. the one on Filtered Mapping. Also, there's a good explanation in Martin Fowler's Patterns of Enterprise Application Architecture. In short: STI is theoretically faster, but you can't really enforce db-level integrity constraints. The proposed implementation is theoretically slower (can involve a lot of joins for deep class hierarchies), but not null and foreign key contraints can actually be enforced at the db level. Those are the main points I remember, but there are many more. Joseph --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-developers -~----------~----~----~----~------~----~------~--~---
