What I''m trying to do seems easy, but I''ve been trying to get it right for 3 days now, and am at my wits end. What I have: 2 tables + 1 join table. Subscribers, Cities, and Cities_Subscribers Form looks like this: TEXTBOX - EMAIL CHECKBOXES - CITIES SUBMIT My models are like so: class Subscriber < ActiveRecord::Base attr_accessor :email, :subscriber_id, :city_id has_and_belongs_to_many :cities accepts_nested_attributes_for :cities end class City < ActiveRecord::Base has_and_belongs_to_many :subcribers end my controller: def create @subscriber = Subscriber.new(params[:subscriber]) if @subscriber.save flash[:notice] = ''Album was successfully created.'' redirect_to(:action => ''index'') else flash[:notice] = ''Errors@!!.'' redirect_to(:action => ''test123'') end end My Form: <%= semantic_form_for Subscriber.new do |f| %> <%= f.inputs :email %> <%= f.semantic_fields_for Subscriber.new do |g| %> <% @cities.each do |ct| %> <label><%= ct.name %> <%= check_box_tag "subscriber[city_ids][]", ct.id %> </label> <% end %> <% end %> <%= f.buttons %> <% end %> ------------- Submitting the form is giving me the following error right now: Mysql::Error: Column ''email'' cannot be null: INSERT INTO `subscribers` (`created_at`, `email`, `updated_at`) VALUES (''2010-10-18 11:17:32'', NULL, ''2010-10-18 11:17:32'') ----------------- but my params on same error page looks like this: {"commit"=>"Create Subscriber", "subscriber"=>{"city_ids"=>["1", "132", "131", "144", "199"], "email"=>"elkffeferae-J0of1frlU80@public.gmane.org"}, "authenticity_token"=>"JvO4pkQPabVJgJsZxJiqeawD3m/SGCw5UPExqtZnLAs=", "utf8"=>"✓"} ----------------- I''m confused where to go from here. Could really use some help asap! thanks! -- 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@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.