Rails - Oct 2008 - RSPEC and Custom Validation date fields

HI All,
I have a model that uses custom validation.  The validation works from
the browser but RSPEC gives it an error.  It looks to me like RSPEC
isn''t seeing the start_time and end_time fields in my model.  If I
change line 9 in my validation to something like "unless title =title"
I don''t have any problem.  The issues seems to be with date
fields.  I suspect this is a bug but since I''m new to RSPEC
I''d like
advice before reporting it.

Here is the error from rspec:


    You have a nil object when you didn''t expect it!
    The error occurred while evaluating nil.<

    /home/leo/railsprojects/trunk/memorymap/app/models/event.rb:9:in
`valid_dates?''
    /home/leo/railsprojects/trunk/memorymap/spec/models/event_spec.rb:
24:

    7
    8  def valid_dates?
    9    unless start_time < end_time
    10      errors.add("End Time must be later than Start Time")
    11    end

Here is my model:

1 class Event < ActiveRecord::Base
  2
validates_presence_of :title, :description, :start_time, :end_time
  3   validates_uniqueness_of :title
  4   validate_on_create :valid_dates?
  5
  6   private
  7
  8   def valid_dates?
  9     unless start_time < end_time
 10       errors.add("End Time must be later than Start Time")
 11     end
 12   end
 13 end

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