What about something like (not real code, just trying to convey the idea):
Item (id, name) # an item is an item. given that you'll probably # purchase the same item more than once, you could # generate an Item list as a shopping list for your # next Costco binge has_many purchases Purchase (id, item_id, run_id, amount) # on a run, you bought some item that cost some # amount, and someone's gonna pay belongs_to item belongs_to run has_many shares Run (id, datetime?) # on this particular run, someone made some number of # purchases (User seems incidental to a run, important # only through its participation in shares) has_many purchases Share (id, user_id, purchase_id, percent) # the cost of each purchase can be divided between # one or more users belongs_to user belongs_to purchase User(id, name) # each user can participate in any number of runs, and # would thereby be liable for some shares has_many shares -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
