Sending Mandrill Merge Variables from a Rails Controller

gistfile1.rb

class ContactMailer < ActionMailer::Base
 
  def contact_form_email(obj)
 
    mail :subject => "Contact Form Submission",
         :to      => "pmichaeljones@gmail.com",
         :from    => "#{obj[:user][:address]}"
 
    #THIS IS THE IMPORTANT CHANGE
    merge_vars =
    {
      "name" => "Patty Jones",
      "message" => "What up sir?"
    }
 
    #DON'T FORGET TO FORMAT IT AS A JSON OBJECT BEFORE SENDING
    headers['X-MC-MergeVars'] = merge_vars.to_json
 
    headers['X-MC-Template'] = "Contact Email Confirmation"
 
  end
 
end