what-is-super

In ruby I sometimes encounter methods like this:

controller do
  def scope
    super.where(location: 'uk')
  end
end

its tricky to see what super is, so I sometimes apply this little bit of debugging code:

controller do
  def scope
    self.class.ancestors.each { |a| puts "#{a} has the method" if a.instance_methods(false).include?(__method__)}
    super.where(location: 'uk')
  end
end

it runs through the self.class ancestors and prints any that have an instance method with the same method name…. it been useful a few times