Turning Rails deprecation warnings into errors

November 22nd, 2007

Rails deprecations are a nice thing. They allow us to know what transition path to use, instead of being left in the dark. With deprecated functionality being removed from Rails, it’s important to know these things.

If you have a decent test coverage, you might want to add this to your config/environments/test.rb:

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class DeprecatedFunctionality < SyntaxError; end
ActiveSupport::Deprecation.behavior = Proc.new {|message, callstack|
  raise DeprecatedFunctionality, message
}

This will raise an exception instead of simply reporting the warning to the console. If you have CruiseControl.rb installed, the messages will show up as errors there too. This is a quick and easy way to force yourself to actually use the new functionality.

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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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