title: Can't use ActiveRecord associations Rails 3 in IRB
body: <p>I have three classes with the following associations:</p>
  
  <pre><code>class Technician &lt; ActiveRecord::Base  
    has_many :tickets
    has_many :services, :through =&gt; :tickets  
  end
  
  class Ticket &lt; ActiveRecord::Base
    belongs_to :technician
    has_many :services
  end
  
  class Service &lt; ActiveRecord::Base
    belongs_to :ticket
    belongs_to :technicians
  end
  </code></pre>
  
  <p>When I try to use the associations in IRB I get the error messages below:</p>
  
  <pre><code>tech = Technician.first
  ticket1 = Ticket.new
  tech.ticket1
  
  NoMethodError: undefined method `t1' for #&lt;Technician:0xa0d6d6c&gt;
  from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/activemodel-3.0.0/lib/active_model/attribute_methods.rb:364:in `method_missing'
  from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.0/lib/active_record/attribute_methods.rb:46:in `method_missing'
  from (irb):7
  from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.0/lib/rails/commands/console.rb:44:in `start'
  from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.0/lib/rails/commands/console.rb:8:in `start'
  from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.0/lib/rails/commands.rb:23:in `&lt;top (required)&gt;'
  from script/rails:6:in `require'
  from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>Am I mission or doing something wrong?</p>