undefined method `average' for nil:NilClass about letsrate HOT 3 CLOSED

I've got this error after installing gem. Install proceedure seemed to go without errors...

  create  app/assets/javascripts/jquery.raty.js
  create  app/assets/images/star-on.png
  create  app/assets/images/star-off.png
  create  app/assets/images/star-half.png
  create  app/assets/javascripts/letsrate.js.erb
  create  app/controllers/rater_controller.rb
  create  app/models/rate.rb
  create  app/models/rating_cache.rb
   route  match '/rate' => 'rater#create', :as => 'rate'
  create  db/migrate/20121227075255359_create_rating_caches.rb
  create  db/migrate/20121227075255364_create_rates.rb

== CreateRatingCaches: migrating =============================================
-- create_table(:rating_caches)
-> 0.0124s
-- add_index(:rating_caches, [:cacheable_id, :cacheable_type])
-> 0.0195s
== CreateRatingCaches: migrated (0.0321s) ====================================

== CreateRates: migrating ====================================================
-- create_table(:rates)
-> 0.0110s
-- add_index(:rates, :rater_id)
-> 0.0156s
-- add_index(:rates, [:rateable_id, :rateable_type])
-> 0.0126s
== CreateRates: migrated (0.0396s) ===========================================

I'm running on rails 3.0.10 and letsrate v1.0.7

Stewart.

from letsrate.

Fixed this error for me... I had copied and pasted the rating_for call, I had for a model @Product...

= rating_for @CAR, "rating"

instead of

= rating_for @Product, "rating"

Stewart.

from letsrate.

Please use the new version of letstrate (1.0.8)

from letsrate.