On Wed, Feb 15, 2012 at 11:55 AM, Bodo Kist <li...@ruby-forum.com> wrote:
> 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. > In that case, could you then send your particular implementation and the stack trace that you got. A wild guess is that there is a problem where looking for an ID (that is only generated when saving to the database; but at this time your questionaire object is still in the making in memory and does not have an id yet). That is why I used the "select" code in my proposal (checks in the array in memory using the belongs_to result == self) and not find (which would look for an entry in db, but we have not saved yet at that point). HTH, Peter -- 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.
