A singleton instance of this class is yielded by Inflector.inflections, which can then be used to specify additional inflection rules. Examples:

  Inflector.inflections do |inflect|
    inflect.plural /^(ox)$/i, '\1\2en'
    inflect.singular /^(ox)en/i, '\1'

    inflect.irregular 'octopus', 'octopi'

    inflect.uncountable "equipment"
  end

New rules are added at the top. So in the example above, the irregular rule for octopus will now be the first of the pluralization and singularization rules that is runs. This guarantees that your rules run before any of the rules that may already have been loaded.

Methods
Included Modules
Attributes
[R] plurals
[R] singulars
[R] uncountables
Public Class methods
new()
    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 27
27:     def initialize
28:       @plurals, @singulars, @uncountables = [], [], []
29:     end
Public Instance methods
clear(scope = :all)

Clears the loaded inflections within a given scope (default is :all). Give the scope as a symbol of the inflection type, the options are: :plurals, :singulars, :uncountables

Examples:

  clear :all
  clear :plurals
    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 70
70:     def clear(scope = :all)
71:       case scope
72:         when :all
73:           @plurals, @singulars, @uncountables = [], [], []
74:         else
75:           instance_variable_set "@#{scope}", []
76:       end
77:     end
irregular(singular, plural)

Specifies a new irregular that applies to both pluralization and singularization at the same time. This can only be used for strings, not regular expressions. You simply pass the irregular in singular and plural form.

Examples:

  irregular 'octopus', 'octopi'
  irregular 'person', 'people'
    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 49
49:     def irregular(singular, plural)
50:       plural(Regexp.new("(#{singular[0,1]})#{singular[1..-1]}$", "i"), '\1' + plural[1..-1])
51:       singular(Regexp.new("(#{plural[0,1]})#{plural[1..-1]}$", "i"), '\1' + singular[1..-1])
52:     end
plural(rule, replacement)

Specifies a new pluralization rule and its replacement. The rule can either be a string or a regular expression. The replacement should always be a string that may include references to the matched data from the rule.

    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 33
33:     def plural(rule, replacement)
34:       @plurals.insert(0, [rule, replacement])
35:     end
singular(rule, replacement)

Specifies a new singularization rule and its replacement. The rule can either be a string or a regular expression. The replacement should always be a string that may include references to the matched data from the rule.

    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 39
39:     def singular(rule, replacement)
40:       @singulars.insert(0, [rule, replacement])
41:     end
uncountable(*words)

Add uncountable words that shouldn’t be attempted inflected.

Examples:

  uncountable "money"
  uncountable "money", "information"
  uncountable %w( money information rice )
    # File vendor/rails/activesupport/lib/active_support/inflector.rb, line 60
60:     def uncountable(*words)
61:       (@uncountables << words).flatten!
62:     end