Module: String::Inflections

Defined in:
lib/sequel/extensions/inflector.rb

Overview

This module acts as a singleton returned/yielded by String.inflections, which is used to override or specify additional inflection rules. Examples:

String.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.

Class Attribute Summary (collapse)

Class Method Summary (collapse)

Class Attribute Details

+ (Object) plurals (readonly)

Array of 2 element arrays, first containing a regex, and the second containing a substitution pattern, used for plurization.



31
32
33
# File 'lib/sequel/extensions/inflector.rb', line 31

def plurals
  @plurals
end

+ (Object) singulars (readonly)

Array of 2 element arrays, first containing a regex, and the second containing a substitution pattern, used for singularization.



34
35
36
# File 'lib/sequel/extensions/inflector.rb', line 34

def singulars
  @singulars
end

+ (Object) uncountables (readonly)

Array of strings for words were the singular form is the same as the plural form



37
38
39
# File 'lib/sequel/extensions/inflector.rb', line 37

def uncountables
  @uncountables
end

Class Method Details

+ (Object) 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


46
47
48
49
50
51
52
53
# File 'lib/sequel/extensions/inflector.rb', line 46

def self.clear(scope = :all)
  case scope
  when :all
    @plurals, @singulars, @uncountables = [], [], []
  else
    instance_variable_set("@#{scope}", [])
  end
end

+ (Object) 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'


61
62
63
64
# File 'lib/sequel/extensions/inflector.rb', line 61

def self.irregular(singular, plural)
  plural(Regexp.new("(#{singular[0,1]})#{singular[1..-1]}$", "i"), '\1' + plural[1..-1])
  singular(Regexp.new("(#{plural[0,1]})#{plural[1..-1]}$", "i"), '\1' + singular[1..-1])
end

+ (Object) 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.

Example:

plural(/(x|ch|ss|sh)$/i, '\1es')


71
72
73
# File 'lib/sequel/extensions/inflector.rb', line 71

def self.plural(rule, replacement)
  @plurals.insert(0, [rule, replacement])
end

+ (Object) 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.

Example:

singular(/([^aeiouy]|qu)ies$/i, '\1y')


80
81
82
# File 'lib/sequel/extensions/inflector.rb', line 80

def self.singular(rule, replacement)
  @singulars.insert(0, [rule, replacement])
end

+ (Object) uncountable(*words)

Add uncountable words that shouldn't be attempted inflected.

Examples:

uncountable "money"
uncountable "money", "information"
uncountable %w( money information rice )


90
91
92
# File 'lib/sequel/extensions/inflector.rb', line 90

def self.uncountable(*words)
  (@uncountables << words).flatten!
end