How to automatically set all links to nofollow in Rails

I know I can pass :rel => "nofollow" to link_to but is there a way 开发者_开发知识库to set that by default so I don't have to make changes in each link_to tag?

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In your application helper you can override the link_to method and replace with your own.

def link_to(name, options = {}, html_options = {})
  html_options.merge!(:rel => :nofollow)
  super(name, options, html_options)
end

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You could create an alias to the old link_to then override it so it calls the old alias with the extra parameter. That way, you don't have to change all the existing link_to in your code.