From: thiagobrandam on 3 Mar 2010 11:53 Hi, I'm having problems with mechanize when I try to subclass it in a rails environment using script/console. The following code works fine: require 'rubygems' require 'mechanize' agent = WWW::Mechanize.new agent.get 'http://www.google.com' But this one doesn't work: require 'rubygems' require 'mechanize' class Alfa < WWW::Mechanize; end agent = Alfa.new agent.get 'http://www.google.com' Everytime I call the get instance method, I get the following error: NoMethodError: You have a nil object when you didn't expect it! The error occurred while evaluating nil.parse from /Library/Ruby/Gems/1.8/gems/mechanize-0.9.3/lib/www/mechanize/ page.rb:77:in `parser' I tried to look at the code in 'page.rb' but I haven't been able to figure out the error. Am I missing something here? Thanks in advance.
From: thiagobrandam on 3 Mar 2010 15:47 On Mar 3, 1:53 pm, thiagobrandam <thiagobran...(a)gmail.com> wrote: > Hi, I'm having problems with mechanize when I try to subclass it in a > rails environment using script/console. > > The following code works fine: > > require 'rubygems' > require 'mechanize' > > agent = WWW::Mechanize.new > agent.get 'http://www.google.com' > > But this one doesn't work: > > require 'rubygems' > require 'mechanize' > > class Alfa < WWW::Mechanize; end > > agent = Alfa.new > agent.get 'http://www.google.com' > > Everytime I call the get instance method, I get the following error: > > NoMethodError: You have a nil object when you didn't expect it! > The error occurred while evaluating nil.parse > from /Library/Ruby/Gems/1.8/gems/mechanize-0.9.3/lib/www/mechanize/ > page.rb:77:in `parser' > > I tried to look at the code in 'page.rb' but I haven't been able to > figure out the error. Am I missing something here? > > Thanks in advance. In case someone gets the same error, you must explicitly set a html parser : class Agent < WWW::Mechanize end a = Agent.new a.html_parser = Nokogiri::HTML a.get 'http://www.google.com'
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