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# The Inflector transforms words from singular to plural, class names to table names, modularized class names to ones without,
# and class names to foreign keys.
module Inflector
extend self
def pluralize(word)
result = word.to_s.dup
if uncountable_words.include?(result.downcase)
result
else
plural_rules.each { |(rule, replacement)| break if result.gsub!(rule, replacement) }
result
end
end
def singularize(word)
result = word.to_s.dup
if uncountable_words.include?(result.downcase)
result
else
singular_rules.each { |(rule, replacement)| break if result.gsub!(rule, replacement) }
result
end
end
def camelize(lower_case_and_underscored_word)
lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
end
def underscore(camel_cased_word)
camel_cased_word.to_s.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z\d])([A-Z])/,'\1_\2').downcase
end
def humanize(lower_case_and_underscored_word)
lower_case_and_underscored_word.to_s.gsub(/_/, " ").capitalize
end
def demodulize(class_name_in_module)
class_name_in_module.to_s.gsub(/^.*::/, '')
end
def tableize(class_name)
pluralize(underscore(class_name))
end
def classify(table_name)
camelize(singularize(table_name))
end
def foreign_key(class_name, separate_class_name_and_id_with_underscore = true)
Inflector.underscore(Inflector.demodulize(class_name)) +
(separate_class_name_and_id_with_underscore ? "_id" : "id")
end
def constantize(camel_cased_word)
camel_cased_word.split("::").inject(Object) do |final_type, part|
final_type = final_type.const_get(part)
end
end
private
def uncountable_words #:doc
%w( equipment information rice money species series fish )
end
def plural_rules #:doc:
[
[/^(ox)$/i, '\1\2en'], # ox
[/([m|l])ouse$/i, '\1ice'], # mouse, louse
[/(matr|vert)ix|ex$/i, '\1ices'], # matrix, vertex, index
[/(x|ch|ss|sh)$/i, '\1es'], # search, switch, fix, box, process, address
[/([^aeiouy]|qu)ies$/i, '\1y'],
[/([^aeiouy]|qu)y$/i, '\1ies'], # query, ability, agency
[/(hive)$/i, '\1s'], # archive, hive
[/(?:([^f])fe|([lr])f)$/i, '\1\2ves'], # half, safe, wife
[/sis$/i, 'ses'], # basis, diagnosis
[/([ti])um$/i, '\1a'], # datum, medium
[/(p)erson$/i, '\1eople'], # person, salesperson
[/(m)an$/i, '\1en'], # man, woman, spokesman
[/(c)hild$/i, '\1hildren'], # child
[/(buffal|tomat)o$/i, '\1\2oes'], # buffalo, tomato
[/(bu)s$/i, '\1\2ses'], # bus
[/(alias)/i, '\1es'], # alias
[/(octop|vir)us$/i, '\1i'], # octopus, virus - virus has no defined plural (according to Latin/dictionary.com), but viri is better than viruses/viruss
[/(ax|cri|test)is$/i, '\1es'], # axis, crisis
[/s$/i, 's'], # no change (compatibility)
[/$/, 's']
]
end
def singular_rules #:doc:
[
[/(matr)ices$/i, '\1ix'],
[/(vert)ices$/i, '\1ex'],
[/^(ox)en/i, '\1'],
[/(alias)es$/i, '\1'],
[/([octop|vir])i$/i, '\1us'],
[/(cris|ax|test)es$/i, '\1is'],
[/(shoe)s$/i, '\1'],
[/(o)es$/i, '\1'],
[/(bus)es$/i, '\1'],
[/([m|l])ice$/i, '\1ouse'],
[/(x|ch|ss|sh)es$/i, '\1'],
[/(m)ovies$/i, '\1\2ovie'],
[/(s)eries$/i, '\1\2eries'],
[/([^aeiouy]|qu)ies$/i, '\1y'],
[/([lr])ves$/i, '\1f'],
[/(tive)s$/i, '\1'],
[/(hive)s$/i, '\1'],
[/([^f])ves$/i, '\1fe'],
[/(^analy)ses$/i, '\1sis'],
[/((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$/i, '\1\2sis'],
[/([ti])a$/i, '\1um'],
[/(p)eople$/i, '\1\2erson'],
[/(m)en$/i, '\1an'],
[/(s)tatus$/i, '\1\2tatus'],
[/(c)hildren$/i, '\1\2hild'],
[/(n)ews$/i, '\1\2ews'],
[/s$/i, '']
]
end
end
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