Hi 2009/2/21 Adys <adys...@gmail.com>
> > Hi there > > I've been thinking for the past couple of days of a simple "lazy" > ForeignKey design (or whichever name would fit better). It's something > I've tried really hard to find in Django, unsuccessfully. Some > explanation first... > Lazy is imho not a decent name indeed, 'lazy' usually means relationships aren't fetched prematurely (foreignkey object isn't fetched automatically), which django does by default if I'm not mistaken. > > I tried to get some background on django-users, cf > http://groups.google.com/group/django-users/browse_thread > > /thread/caec53feb0ddb43a# > To make it short: My project reuses imported data. This data is *very* > faulty and a lot of ForeignKeys point to deleted/non-existing rows. I > can't afford checking integrity constantly (cf link). > As far I c > > A lazy ForeignKey would assume the data is valid, and return > "something else" if it's not. I'm not sure what the best value > returned would be. It could be a row with placeholder/default values, > it could be an exception, etc. I haven't worked deeply with Django's > codebase, I'm unsure about design details. > The idea here is to be able to offer something "valid or unknown". I > hope I'm not too unclear... > First of all, imho this isn't about "lazy", lazy usually means relationships aren't fetched prematurely (foreignkey object isn't fetched automatically), which django does by default. Secondly, the NULL value in databases is actually defined originally as Unknown, so it seams normal in your situation to default to None if your relationship is undefined (and allow null=True in your model). > > I'm sure there's a better solution - I have yet to find it - but I > would first like to hear feedback on a feature like that. If you feel > it's a good idea I'm interested in working on it. If you feel > otherwise, well... I'm still looking for a better suggestion. > > Cheers > > JL > > > > --~--~---------~--~----~------------~-------~--~----~ 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 django-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-developers?hl=en -~----------~----~----~----~------~----~------~--~---
