Ruby on Rails

Hey

I have a problem with nomethoderror and have no idea how to solve it.

In logs:

NoMethodError (undefined method `length=' for #<Book:0x000000081583f0>):
2013-03-28T12:38:35+00:00 app[web.2]:   app/models/engine/book.rb:13:in `block in find_or_create_by_guide'
2013-03-28T12:38:35+00:00 app[web.2]:   app/models/engine/book.rb:9:in `find_or_create_by_guide'
2013-03-28T12:38:35+00:00 app[web.2]:   app/controllers/guide_controller.rb:37:in `find_or_create_book_based_on_guide'

cache: [GET /en/books/planner/preview] miss
2013-03-28T12:38:35+00:00 app[web.2]: Processing by BooksController#preview as */*
2013-03-28T12:38:35+00:00 app[web.2]:   Parameters: {"locale"=>"en", "id"=>"planner"}
2013-03-28T12:38:35+00:00 app[web.2]: Unknown label 'www'. Switching label to bookless
2013-03-28T12:38:35+00:00 app[web.2]: Finded book #515439c0e622d90002000019
2013-03-28T12:38:35+00:00 app[web.2]: Completed 500 Internal Server Error in 82ms

Book.rb:
module ClassMethods
      def find_or_create_by_guide(guide)
        book = ::Book.find_or_create_by_document(guide.id.to_s) do |t|
          t.city_id = guide.city
          t.host    = guide.host
          t.pace    = guide.pace || :normal
          t.length  = guide.length
        end
Later in Book.rb, I have:

groups = sorted_points.in_groups_of(length, false)


In Book.rb I have attr_accessible :length. I've also updated the table with length column:
class AddLengthColumnToBooks < ActiveRecord::Migration
  def change
    add_column :books, :length, :integer
  end
end

I have no idea what's going on. Can someone please help me with this?

--
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe@googlegroups.com.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/ANkbPwZDL-MJ.
For more options, visit https://groups.google.com/groups/opt_out.