Rails - Feb 2008 - Caching computations on ActiveRecords

I have arrived at the following idiom for caching certain expensive
computations on ActiveRecord subclasses:

  def expensive
    @expensive = hairy_database_query_or_something
  end

  def reload
    @expensive = nil
    super
  end

It works, but I''m vaguely unhappy about it.  Is there a better way?




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