Found solution - Use "unloadable" for these classes - http://strd6.com/?p=250
On Jul 20, 11:25 pm, tonymocha <mochat...@gmail.com> wrote: > Hi, > > My system has been encounter this problem, and I couldn't find > solution after debugging. My scenario is stated below: > > class user > has_many :posts > has_many :comments > end > > class post > belongs_to :user > has_many :comments, :as => :commentable > end > > class comment > belongs_to :post > belongs_to :user > end > > For this case, I am trying to retrieve each post's comment together > with submitter username and I write as below: > > class PostsController<ApplicationController > def show > raise @post.comments.first.user.inspect > end > end > > While the first time I run this script, it works fine. But, after I > hitting a refresh, it hits following problem "can't dup NilClass". It > is repeats the same for everytime i restart mongrel, working for the > first time and failed for the rest. > > I append the application error log as below: > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:2189:in `dup' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:2189:in `scoped_methods' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:2193:in `current_scoped_methods' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:2183:in `scope' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:1548:in `find_every' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:1588:in `find_one' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:1574:in `find_from_ids' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > base.rb:616:in `find' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > associations/belongs_to_association.rb:44:in `find_target' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > associations/association_proxy.rb:240:in `load_target' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > associations/association_proxy.rb:112:in `reload' > /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ > associations.rb:1231:in `user' > > Need some help for this. Thanks in advance. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
