ActiveModel::Name

    # File lib/active_model/naming.rb, line 8
 8:     def initialize(klass)
 9:       super(klass.name)
10:       @klass = klass
11:       @singular = ActiveSupport::Inflector.underscore(self).tr('/', '_').freeze
12:       @plural = ActiveSupport::Inflector.pluralize(@singular).freeze
13:       @element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self)).freeze
14:       @human = ActiveSupport::Inflector.humanize(@element).freeze
15:       @collection = ActiveSupport::Inflector.tableize(self).freeze
16:       @partial_path = "#{@collection}/#{@element}".freeze
17:       @i18n_key = ActiveSupport::Inflector.underscore(self).tr('/', '.').to_sym
18:     end

    # File lib/active_model/naming.rb, line 26
26:     def human(options={})
27:       return @human unless @klass.respond_to?(:lookup_ancestors) &&
28:                            @klass.respond_to?(:i18n_scope)
29: 
30:       defaults = @klass.lookup_ancestors.map do |klass|
31:         klass.model_name.i18n_key
32:       end
33: 
34:       defaults << options.delete(:default) if options[:default]
35:       defaults << @human
36: 
37:       options.reverse_merge! :scope => [@klass.i18n_scope, :models], :count => 1, :default => defaults
38:       I18n.translate(defaults.shift, options)
39:     end