class Rails::Generators::Base

def self.generator_name

Rails::Generators::ModelGenerator will return "model" as generator name.
Removes the namespaces and get the generator name. For example,

def self.generator_name
  @generator_name ||= begin
    if generator = name.to_s.split('::').last
      generator.sub!(/Generator$/, '')
      generator.underscore
    end
  end
end