diff options
Diffstat (limited to 'actionpack/lib/action_controller/support/inflector.rb')
| -rw-r--r-- | actionpack/lib/action_controller/support/inflector.rb | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/support/inflector.rb b/actionpack/lib/action_controller/support/inflector.rb new file mode 100644 index 0000000000..05ff4fede9 --- /dev/null +++ b/actionpack/lib/action_controller/support/inflector.rb @@ -0,0 +1,78 @@ +# 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)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'], + [/([^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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