Module: I18n::Backend::Pluralization

Defined in:
lib/i18n/backend/pluralization.rb

Instance Method Summary collapse

Instance Method Details

#pluralize(locale, entry, count) ⇒ Object

Overwrites the Base backend translate method so that it will check the translation meta data space (:i18n) for a locale specific pluralization rule and use it to pluralize the given entry. I.e. the library expects pluralization rules to be stored at I18n.t(:‘i18n.plural.rule’)

Pluralization rules are expected to respond to #call(count) and return a pluralization key. Valid keys depend on the translation data hash (entry) but it is generally recommended to follow CLDR’s style, i.e., return one of the keys :zero, :one, :few, :many, :other.

The :zero key is always picked directly when count equals 0 AND the translation data has the key :zero. This way translators are free to either pick a special :zero translation even for languages where the pluralizer does not return a :zero key.



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# File 'lib/i18n/backend/pluralization.rb', line 31

def pluralize(locale, entry, count)
  return entry unless entry.is_a?(Hash) and count

  pluralizer = pluralizer(locale)
  if pluralizer.respond_to?(:call)
    key = count == 0 && entry.has_key?(:zero) ? :zero : pluralizer.call(count)
    raise InvalidPluralizationData.new(entry, count, key) unless entry.has_key?(key)
    entry[key]
  else
    super
  end
end