salesforce_hc.rb

module Salesforce
  def method_missing(name, *args, &block)
    return super if valid_attribute_name? name
    if name.to_s[-1] == '='
      send "#{ name.to_s.gsub '=', '__c=' }".to_sym, *args
    elsif name.to_s.end_with? '_changed?'
      send "#{name.to_s.gsub '_changed?', '__c_changed?'}".to_sym, *args
    else
      send "#{ name }__c".to_sym
    end
  end

  private

  def valid_attribute_name?(name)
    attr = name.to_s.chomp('_changed?').chomp('?').chomp('=')
    attributes.include?(attr) || attr.include?('__c')
  end
  
end