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author | David Heinemeier Hansson <david@loudthinking.com> | 2004-12-29 21:03:21 +0000 |
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committer | David Heinemeier Hansson <david@loudthinking.com> | 2004-12-29 21:03:21 +0000 |
commit | bd323b3c99437cf1a50d7b4c23a64f296859c56a (patch) | |
tree | 943347b52f12f8df492c0864e7ba61318e459f63 /activesupport/lib/inflector.rb | |
parent | 1b0da48fe98abc67b56bc76f2af59a90198b21cc (diff) | |
download | rails-bd323b3c99437cf1a50d7b4c23a64f296859c56a.tar.gz rails-bd323b3c99437cf1a50d7b4c23a64f296859c56a.tar.bz2 rails-bd323b3c99437cf1a50d7b4c23a64f296859c56a.zip |
Moved support from both Action Pack and Active Record into a separate module called Active Support that can be included using svn:externals in both
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@273 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activesupport/lib/inflector.rb')
-rw-r--r-- | activesupport/lib/inflector.rb | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/activesupport/lib/inflector.rb b/activesupport/lib/inflector.rb new file mode 100644 index 0000000000..5fddf9d09c --- /dev/null +++ b/activesupport/lib/inflector.rb @@ -0,0 +1,80 @@ +# The Inflector transforms words from singular to plural, class names to table names, modulized class names to ones without, +# and class names to foreign keys. +module Inflector + extend self + + def pluralize(word) + result = word.dup + plural_rules.each do |(rule, replacement)| + break if result.gsub!(rule, replacement) + end + return result + end + + def singularize(word) + result = word.dup + singular_rules.each do |(rule, replacement)| + break if result.gsub!(rule, replacement) + end + return result + end + + def camelize(lower_case_and_underscored_word) + lower_case_and_underscored_word.gsub(/(^|_)(.)/){$2.upcase} + end + + def underscore(camel_cased_word) + camel_cased_word.gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z])([A-Z])/,'\1_\2').downcase + end + + def demodulize(class_name_in_module) + class_name_in_module.gsub(/^.*::/, '') + end + + def tableize(class_name) + pluralize(underscore(class_name)) + end + + def classify(table_name) + camelize(singularize(table_name)) + end + + def foreign_key(class_name, separate_class_name_and_id_with_underscore = true) + Inflector.underscore(Inflector.demodulize(class_name)) + + (separate_class_name_and_id_with_underscore ? "_id" : "id") + end + + private + def plural_rules #:doc: + [ + [/(x|ch|ss)$/, '\1es'], # search, switch, fix, box, process, address + [/([^aeiouy]|qu)ies$/, '\1y'], + [/([^aeiouy]|qu)y$/, '\1ies'], # query, ability, agency + [/(?:([^f])fe|([lr])f)$/, '\1\2ves'], # half, safe, wife + [/sis$/, 'ses'], # basis, diagnosis + [/([ti])um$/, '\1a'], # datum, medium + [/person$/, 'people'], # person, salesperson + [/man$/, 'men'], # man, woman, spokesman + [/child$/, 'children'], # child + [/s$/, 's'], # no change (compatibility) + [/$/, 's'] + ] + end + + def singular_rules #:doc: + [ + [/(x|ch|ss)es$/, '\1'], + [/movies$/, 'movie'], + [/([^aeiouy]|qu)ies$/, '\1y'], + [/([lr])ves$/, '\1f'], + [/([^f])ves$/, '\1fe'], + [/(analy|ba|diagno|parenthe|progno|synop|the)ses$/, '\1sis'], + [/([ti])a$/, '\1um'], + [/people$/, 'person'], + [/men$/, 'man'], + [/status$/, 'status'], + [/children$/, 'child'], + [/s$/, ''] + ] + end +end
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