Hi Andy - why not just post your code here? Saves clicking away, and it's easier to discuss the code. Anyway, you posted
class Role < ActiveRecord::Base belongs_to :author belongs_to :book end class Book < ActiveRecord::Base has_many :authors, :through => :roles has_many :roles end class Author < ActiveRecord::Base has_many :books, :through => :roles has_many :roles end The problem with this is this part of the description: "An Author can also have one or many roles associated with a book " - with "or many" being the key part. In your system, let's say that David Smith is the editor of and a contributor to a book called "Advances in web design". Then you have two roles objects linking david to the book. That makes it look like two people worked on the book, who happen to be the same person, and it makes it look like david wrote two books that happen to be the same book. This is confusing. If i want to know, for example, how many books David has worked on, i'd expect the answer to be 1, not 2. You could get around this by calling 'uniq' on the results of .books or .authors, but it's unintuitive and fragile. -- 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 [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.
