lib/impressionist/models/mongo_mapper/impression.rb
class Impression
include MongoMapper::Document
key :impressionable_type, String
key :impressionable_id, String
key :user_id, String
key :controller_name, String
key :action_name, String
key :view_name, String
key :request_hash, String
key :ip_address, String
key :session_hash, String
key :message, String
key :referrer, String
timestamps!
belongs_to :impressionable, :polymorphic=>true
end