Per method exception and ensure handlers

April 17th, 2006

In Ruby, methods automatically define begin/end blocks. That makes it easy to write exception handlers and ensure blocks:

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def access!(options={})
  raise AuthorizationFailure if self.email != options[:email]
  self.download_count += 1

  rescue AuthorizationFailure
    self.unauthorized_access_count += 1
    raise

  ensure
    self.save!
end

It is important to re-raise the exception in the exception handler, or else the exception will be silently thrown away.

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I am François Beausoleil, a Ruby on Rails coder. During the day, I work on XLsuite. At night, I am interested many things. Read my biography

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