This is a better place to start, ruby on rails guide. Basically all you need is a foreign key pointing both directions in the join table.
http://guides.rubyonrails.org/association_basics.html#the-has-and-belongs-to-many-association On Jul 12, 7:24 pm, Marnen Laibow-Koser <[email protected]> wrote: > RichardOnRails wrote: > > I just added these linkage statements to my Expense and Vendor models, > > respectively. > > Which? You neglected to say. > > > > > I found a "HOWTO: Beginning Relationships" > > webpage (http://www.railsforum.com/viewtopic.php?id=265). > > Why are you following tutorials from 2006, before Rails 1.0 even > existed? > > And what have you been doing all this time? You've been posting on this > list for a long time; have you really never looked at associations > before? > > > > > That leads me to think that I need to: > > 1. Create migration Add_Vendor_ID_to_Expense and then add column > > vendor_id of type integer, or something like that. > > 2. Create migration Add_Expense_ID_to_Vendor and then add column > > expense_id of type integer, or something like that. > > You don't need both. > > > 3. Create migration Create_Expense_Vendor_Table and then add > > expense_id and vendor_id columns. > > You may not need this at all. > > And it should all be in one migration class if it represents one > conceptual change. > > > > > Then I can rake db:migrate. > > Right. > > > > > Is that a sensible start? > > > > Thanks in advance, > > Richard > > Best, > -- > Marnen Laibow-Koserhttp://www.marnen.org > [email protected] > > Sent from my iPhone > -- > Posted viahttp://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 [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.
