Context is that I'm trying to adapt an ActionMailer to create a mail any time I update a tag in the Eribium CMS.   

The error I'm getting:   

 NoMethodError in Admin/tagsController#update

undefined method `foo' for ContactFormMailer:Class

RAILS_ROOT: ../config/..
Application Trace | Framework Trace | Full Trace

/usr/local/lib/ruby/gems/1.8/gems/actionmailer-1.2.1/lib/action_mailer/base.rb:229:in `method_missing'
#{RAILS_ROOT}/app/controllers/admin/tags_controller.rb:115:in `philip_mail_tomfoolery'
#{RAILS_ROOT}/app/controllers/admin/tags_controller.rb:108:in `update'

/usr/local/lib/ruby/gems/1.8/gems/actionmailer-1.2.1/lib/action_mailer/base.rb:229:in `method_missing'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in `perform_action_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in `perform_action_without_benchmark'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in `perform_action'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in `process_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in `process_without_session_management_support'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in `process'
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in `dispatch'
dispatch.cgi:10

/usr/local/lib/ruby/gems/1.8/gems/actionmailer-1.2.1/lib/action_mailer/base.rb:229:in `method_missing'
#{RAILS_ROOT}/app/controllers/admin/tags_controller.rb:115:in `philip_mail_tomfoolery'
#{RAILS_ROOT}/app/controllers/admin/tags_controller.rb:108:in `update'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in `perform_action_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in `perform_action_without_benchmark'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in `perform_action'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in `process_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in `process_without_session_management_support'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in `process'
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in `dispatch'
dispatch.cgi:10

Request

Parameters: {"commit"=>"Update", "tag"=>{"name"=>"tech", "description"=>"This is an update", "text_filter"=>"markdown"}, "id"=>"1"}

Show session dump

--- 
:user_id: 1
:jumpto: 
flash: !map:ActionController::Flash::FlashHash {}


Response
Headers: {"Status"=>"200 OK", "cookie"=>[], "Cache-Control"=>"no-cache"}


My attempt at calling ActionMailer (hacked into Eribium but this is clearly getting called: 

    #I'm testing my understanding of ActionMailer....
    #More or less hacked from page 416 of the Rails book
    def philip_mail_tomfoolery
        emailer = ContactFormMailer
        emailer.foo
        emailer.contact_form
        email = ContactFormMailer.contact_form
        render (:text => '<pre>' + email.encoded + '</pre>')
        
    end


... and the contact_form_mailer.rb file itself: 

class ContactFormMailer < ActionMailer::Base
    def foo
        puts 555
    end

  def contact_form(sent_at = Time.now)
    @subject    = 'Message from ContactFormMailer#contact_form'
    @body       = {}
    @recipients = 'philipreedtech@gmail.com'
    @from       = ''
    @sent_on    = sent_at
    @headers    = {}
  end
end