NiceCabbage Blog » rails http://www.nicecabbage.com Life, Design, Web Application Mon, 07 Jun 2010 02:03:24 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 root_url undefined http://www.nicecabbage.com/2009/08/root_url-undefined/ http://www.nicecabbage.com/2009/08/root_url-undefined/#comments Thu, 06 Aug 2009 18:18:03 +0000 admin http://www.nicecabbage.com/?p=156 Problem

On Ruby on Rails, you see the NameError of “undefined local variable or method `root_url’ for #<YourController>”.

Solution

You need to set map.root in config/routes.rb, such as 

  mpa.root :controller => :welcome
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