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class MyModel
  named_scope :not_hidden, :conditions => ['hidden IS NULL OR hidden = ?', false]
end

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class MyModel
  named_scope :not_hidden, :conditions => { :hidden => false }
end

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class MyModel
  named_scope :not_hidden, :conditions => ['hidden IS NULL OR hidden = 0 OR hidden = ?', 'f']
end

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require 'erb'

# GOAL: render the template with the following vars
...