My project was working when I add new field category It is showing the error in create form and edit form i am sending u controller file as attechment this is my model(category.rb) dor category file class Category < ActiveRecord::Base has_many :classifieds end and this is edit.rhtml <h1>Editing Classified: <%= @classified.title -%></h1> <%= form_tag :action => ''update'', :id => @classified %> <p><label for="classified_title">Title</label><br/> <%= text_field ''classified'', ''title'' %></p> <p><label for="classified_price">Price</label><br/> <%= text_field ''classified'', ''price'' %></p> <p><label for="classified_location">Location</label><br/> <%= text_field ''classified'', ''location'' %></p> <p><label for="classified_description">Description</label><br/> <%= text_area ''classified'', ''description'' %></p> <p><label for="classified_category">Category</label><br /> <%= collection_select(:classified, :category_id, @categories, :id, :name) %></p> <p><label for="classified_email">Email</label><br/> <%= text_field ''classified'', ''email'' %></p> <%= submit_tag "Save changes" %> <%= form_tag %> <%= link_to ''Back'', {:action => ''list'' } %> Attachments: http://www.ruby-forum.com/attachment/1883/classified_controller.rb -- 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---