def normalize_friendly_id(value)
      value = value.to_s.parameterize
      value = value[0...friendly_id_config.slug_limit] if friendly_id_config.slug_limit
      value
    end
def normalize_friendly_id(value)
      value = value.to_s.parameterize
      value = value[0...friendly_id_config.slug_limit] if friendly_id_config.slug_limit
      value
    end
Process the given value to make it suitable for use as a slug.

 This method is not intended to be invoked directly; FriendlyId uses it
 internally to process strings into slugs.

 However, if FriendlyId's default slug generation doesn't suit your needs,
 you can override this method in your model class to control exactly how
 slugs are generated.

 ### Example

     class Person < ActiveRecord::Base
       extend FriendlyId
       friendly_id :name_and_location

       def name_and_location
         "#{name} from #{location}"
       end

       # Use default slug, but upper case and with underscores
       def normalize_friendly_id(string)
         super.upcase.gsub("-", "_")
       end
     end

     bob = Person.create! :name => "Bob Smith", :location => "New York City"
     bob.friendly_id #=> "BOB_SMITH_FROM_NEW_YORK_CITY"

 ### More Resources

 You might want to look into Babosa[https://github.com/norman/babosa],
 which is the slugging library used by FriendlyId prior to version 4, which
 offers some specialized functionality missing from Active Support.

 @param [#to_s] value The value used as the basis of the slug.
 @return The candidate slug text, without a sequence.