On Feb 16, 4:54 pm, Emily Rodgers <emily.kate.rodg...@googlemail.com> wrote: > On Feb 16, 3:39 pm, bruno desthuilliers > > <bruno.desthuilli...@gmail.com> wrote: > > On Feb 16, 2:56 pm, Derek <gamesb...@gmail.com> wrote: > [snip] > > Ain't that "memberships" relationship redundant with passenger->flight- > > > >operator->memberships ? > > I reckon he probably wants to do is split passenger up: > > class Passenger(models.Model): > customer = models.ForeignKey(User) > flight = models.ForeignKey(Flight) > > and have memberships as an attribute of the user.
I'm afraid I don't really get what difference it would make. Note that my question was genuine - I know zilch about the problem domain, I don't have the fisrt clue about what an "Alliance" might be, so I don't know if that relationship is redundant or if it's totally distinct from what you'd get thru the passenger/flight/operator/ memberships link. > > > > So, if Passenger 57 books a flight with, say, AIA, which is a member of > > > the > > > Star and Western alliances, how can I tell if this qualifies for a > > > discount? > > > How could we know ? There's zero documentation about your models > > fields, and zero documention about the business rules - specially the > > ones one relating to "discount" and "qualification". Or are we > > supposed to use a crystal ball ? > > You do have a point, but I think he is wanting a vague idea of how to > go about it rather than for us to write his code for him. Or maybe get > a discussion going about the pros and cons of different ways of > querying. Here again, my point is that answering the OP question requires some (implicit) knowledge of the domain that I just don't have - and I'm probably not the only one here lacking that knowledge. -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
