Thanks. I forgot to mention that one solution is discussed on
http://stackoverflow.com/questions/9174513/rails-has-many-through-form-with-checkboxes-and-extra-field-in-the-join-model/9191867#9191867 When I try this approach I got an error message from inside the original routine below: Couldn't find Questionnaire without an ID (In my case Product is User, Category is Form and Categorization is Questionnaire.) def initialized_categorizations # this is the key method [].tap do |o| Category.all.each do |category| if c = categorizations.find { |c| c.category_id == category.id } o << c.tap { |c| c.enable ||= true } else o << Categorization.new(category: category) end end end end ... My question is what the error line tries to do in detail. Anyway, I'm surprised that for this common problem there is still no reasonable solution available. Regards Bodo -- 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.
