in Rails 3.1.rc1 wrong number of arguments (4 for 3) occured

[thaniyarasu]

here is the correct one

module NestedForm
class Builder

def fields_for_with_nested_attributes(association_name, association, options, block)
  block ||= Proc.new { |fields| @template.render(:partial => "#{association_name.to_s.singularize}_fields", :locals => {:f => fields}) }
  @fields ||= {}
  @fields[association_name] = block
  super(association_name, association, options, block)
end

end
end

[ryanb]

This is a duplicate of #42. Closing.