Hi Fred, thanks for the reply, So for any given row in product_suppliers, there's a supplier_id. > Surely the row in the suppliers table with that id is either a > Manufacturor or a Vendor ?
The relationship is like that: class ProductsSupplier < ActiveRecord::Base belongs_to :product belongs_to :supplier end class Supplier < ActiveRecord::Base has_many :product_suppliers has_many :products, through => :product_suppliers end The first though I had was to use STI **but** somehow make AR instantiate the object based on a type attribute in a different model/table (in this case in the products_suppliers table) so as to make the type vary based on the relationship between product and supplier (as a a supplier might be a vendor for a product and/or maybe a manufacturer). The thing is, I tried to monkeypatch AR to add this support to STI, but the thing is that I ended up by loosing too much time. I think that I will just keep a type field in products_suppliers and save a string value there (maybe coming from an enumeration) and define a method in the supplier model to get its type (is_vendor?, is_manufacturer)... KIS[S] :) But of course, any suggestions appreciated! Thanks, Marcelo. On Thu, Apr 2, 2009 at 3:32 PM, Frederick Cheung <[email protected] > wrote: > > > > On Apr 2, 7:05 pm, Marcelo de Moraes Serpa <[email protected]> > wrote: > > > What I would like to happen is, when a supplier is retrieved using the > > following command: > > > > @suppliers = @product.suppliers.all > > > > Somehow hook up AR and look into the type attribute of the > > products_suppliers association and for each record, instantiate the > correct > > class (either Vendor or Manufacturer). > > > > So for any given row in product_suppliers, there's a supplier_id. > Surely the row in the suppliers table with that id is either a > Manufacturor or a Vendor ? > > Fred > > > > > It's STI, only that the type data is in another realm and is "variable" > > (depending on the product). > > > > Is there a way to do that with the current STI implementation in Rails > > 2.2.2? If not, how could I hook up AR to make it happen? Or do you > suggest > > something simpler? > > > > Any suggestions appreciated. > > > > Marcelo. > > > --~--~---------~--~----~------------~-------~--~----~ 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
