class ActiveModel::Name

def human(options={})

Specify +options+ with additional translating options.

BlogPost.model_name.human # => "Blog post"

it will underscore then humanize the class name
Transform the model name into a more humane format, using I18n. By default, 
def human(options={})
  return @human unless @klass.respond_to?(:lookup_ancestors) &&
                       @klass.respond_to?(:i18n_scope)
  defaults = @klass.lookup_ancestors.map do |klass|
    [klass.model_name.i18n_key,
     klass.model_name.i18n_key.to_s.tr('.', '/').to_sym]
  end.flatten
  defaults << options.delete(:default) if options[:default]
  defaults << @human
  options.reverse_merge! :scope => [@klass.i18n_scope, :models], :count => 1, :default => defaults
  I18n.translate(defaults.shift, options)
end

def initialize(klass) 

def initialize(klass)
  super(klass.name)
  @klass = klass
  @singular = ActiveSupport::Inflector.underscore(self).tr('/', '_').freeze
  @plural = ActiveSupport::Inflector.pluralize(@singular).freeze
  @element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self)).freeze
  @human = ActiveSupport::Inflector.humanize(@element).freeze
  @collection = ActiveSupport::Inflector.tableize(self).freeze
  @partial_path = "#{@collection}/#{@element}".freeze
  @i18n_key = ActiveSupport::Inflector.underscore(self).tr('/', '.').to_sym
end