I got two models, Book and Word. class Book < ActiveRecord::Base has_and_belongs_to_many :words end class Word < ActiveRecord::Base has_and_belongs_to_many :books end I got a Join Tables for has_and_belongs_to_many Associations class CreateBooksWords < ActiveRecord::Migration def self.up create_table :books_words, :id => false do |t| t.integer :book_id t.integer :word_id t.timestamps end end def self.down drop_table :books_words end end Now I want to create Routing, and user can insert words for a book. How do I do that? -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.