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Finally moved to Rails 3 for a new project and already running into a rookie problem. Trying to do a simple nested form. 2 models: list and tasks List model class List < ActiveRecord::Base has_many :tasks, :dependent=>:destroy accepts_nested_attributes_for :tasks, :reject_if => lambda { |a| a[:name].blank? } end Task Model class Task < ActiveRecord::Base belongs_to :list end List Controller def new @list = List.new 3.times{ @list.tasks.build } end lists/new.html.erb <% form_for :list, :url=>{:action=>"create"} do |f| %> <%= f.text_field :name, :class=>'big' %> <%= f.label :name, "ex: Today's Todos, Christmas List" %> <% f.fields_for :tasks do |builder| %> <p> <%= builder.label :name, "Task" %> <%= builder.text_field :name %> <%= builder.check_box :_destroy %> </p> <% end %> <p><%= submit_tag "Create List", :id => "submit", :name => "submit", :class => "form_submit", :disabled => false, :disable_with => "Please wait..." %></p> <% end -%> Using debug @list I can see the 3 tasks I created in my controller, but it fields_for won't render. Any ideas?

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