diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/string/inflections.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/string/inflections.rb | 127 |
1 files changed, 81 insertions, 46 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb index 002688d6c0..070bfd7af6 100644 --- a/activesupport/lib/active_support/core_ext/string/inflections.rb +++ b/activesupport/lib/active_support/core_ext/string/inflections.rb @@ -4,57 +4,80 @@ require 'active_support/inflector/transliterate' # String inflections define new methods on the String class to transform names for different purposes. # For instance, you can figure out the name of a table from the name of a class. # -# "ScaleScore".tableize # => "scale_scores" +# 'ScaleScore'.tableize # => "scale_scores" # class String # Returns the plural form of the word in the string. # - # "post".pluralize # => "posts" - # "octopus".pluralize # => "octopi" - # "sheep".pluralize # => "sheep" - # "words".pluralize # => "words" - # "the blue mailman".pluralize # => "the blue mailmen" - # "CamelOctopus".pluralize # => "CamelOctopi" - def pluralize - ActiveSupport::Inflector.pluralize(self) + # If the optional parameter +count+ is specified, + # the singular form will be returned if <tt>count == 1</tt>. + # For any other value of +count+ the plural will be returned. + # + # 'post'.pluralize # => "posts" + # 'octopus'.pluralize # => "octopi" + # 'sheep'.pluralize # => "sheep" + # 'words'.pluralize # => "words" + # 'the blue mailman'.pluralize # => "the blue mailmen" + # 'CamelOctopus'.pluralize # => "CamelOctopi" + # 'apple'.pluralize(1) # => "apple" + # 'apple'.pluralize(2) # => "apples" + def pluralize(count = nil) + if count == 1 + self + else + ActiveSupport::Inflector.pluralize(self) + end end # The reverse of +pluralize+, returns the singular form of a word in a string. # - # "posts".singularize # => "post" - # "octopi".singularize # => "octopus" - # "sheep".singularize # => "sheep" - # "word".singularize # => "word" - # "the blue mailmen".singularize # => "the blue mailman" - # "CamelOctopi".singularize # => "CamelOctopus" + # 'posts'.singularize # => "post" + # 'octopi'.singularize # => "octopus" + # 'sheep'.singularize # => "sheep" + # 'word'.singularize # => "word" + # 'the blue mailmen'.singularize # => "the blue mailman" + # 'CamelOctopi'.singularize # => "CamelOctopus" def singularize ActiveSupport::Inflector.singularize(self) end # +constantize+ tries to find a declared constant with the name specified # in the string. It raises a NameError when the name is not in CamelCase - # or is not initialized. + # or is not initialized. See ActiveSupport::Inflector.constantize # - # Examples - # "Module".constantize # => Module - # "Class".constantize # => Class + # 'Module'.constantize # => Module + # 'Class'.constantize # => Class + # 'blargle'.constantize # => NameError: wrong constant name blargle def constantize ActiveSupport::Inflector.constantize(self) end + # +safe_constantize+ tries to find a declared constant with the name specified + # in the string. It returns nil when the name is not in CamelCase + # or is not initialized. See ActiveSupport::Inflector.safe_constantize + # + # 'Module'.safe_constantize # => Module + # 'Class'.safe_constantize # => Class + # 'blargle'.safe_constantize # => nil + def safe_constantize + ActiveSupport::Inflector.safe_constantize(self) + end + # By default, +camelize+ converts strings to UpperCamelCase. If the argument to camelize # is set to <tt>:lower</tt> then camelize produces lowerCamelCase. # # +camelize+ will also convert '/' to '::' which is useful for converting paths to namespaces. # - # "active_record".camelize # => "ActiveRecord" - # "active_record".camelize(:lower) # => "activeRecord" - # "active_record/errors".camelize # => "ActiveRecord::Errors" - # "active_record/errors".camelize(:lower) # => "activeRecord::Errors" + # 'active_record'.camelize # => "ActiveRecord" + # 'active_record'.camelize(:lower) # => "activeRecord" + # 'active_record/errors'.camelize # => "ActiveRecord::Errors" + # 'active_record/errors'.camelize(:lower) # => "activeRecord::Errors" def camelize(first_letter = :upper) case first_letter - when :upper then ActiveSupport::Inflector.camelize(self, true) - when :lower then ActiveSupport::Inflector.camelize(self, false) + when :upper + ActiveSupport::Inflector.camelize(self, true) + when :lower + ActiveSupport::Inflector.camelize(self, false) end end alias_method :camelcase, :camelize @@ -65,8 +88,8 @@ class String # # +titleize+ is also aliased as +titlecase+. # - # "man from the boondocks".titleize # => "Man From The Boondocks" - # "x-men: the last stand".titleize # => "X Men: The Last Stand" + # 'man from the boondocks'.titleize # => "Man From The Boondocks" + # 'x-men: the last stand'.titleize # => "X Men: The Last Stand" def titleize ActiveSupport::Inflector.titleize(self) end @@ -76,30 +99,43 @@ class String # # +underscore+ will also change '::' to '/' to convert namespaces to paths. # - # "ActiveRecord".underscore # => "active_record" - # "ActiveRecord::Errors".underscore # => active_record/errors + # 'ActiveModel'.underscore # => "active_model" + # 'ActiveModel::Errors'.underscore # => "active_model/errors" def underscore ActiveSupport::Inflector.underscore(self) end # Replaces underscores with dashes in the string. # - # "puni_puni" # => "puni-puni" + # 'puni_puni' # => "puni-puni" def dasherize ActiveSupport::Inflector.dasherize(self) end # Removes the module part from the constant expression in the string. # - # "ActiveRecord::CoreExtensions::String::Inflections".demodulize # => "Inflections" - # "Inflections".demodulize # => "Inflections" + # 'ActiveRecord::CoreExtensions::String::Inflections'.demodulize # => "Inflections" + # 'Inflections'.demodulize # => "Inflections" + # + # See also +deconstantize+. def demodulize ActiveSupport::Inflector.demodulize(self) end - # Replaces special characters in a string so that it may be used as part of a 'pretty' URL. + # Removes the rightmost segment from the constant expression in the string. # - # ==== Examples + # 'Net::HTTP'.deconstantize # => "Net" + # '::Net::HTTP'.deconstantize # => "::Net" + # 'String'.deconstantize # => "" + # '::String'.deconstantize # => "" + # ''.deconstantize # => "" + # + # See also +demodulize+. + def deconstantize + ActiveSupport::Inflector.deconstantize(self) + end + + # Replaces special characters in a string so that it may be used as part of a 'pretty' URL. # # class Person # def to_param @@ -119,9 +155,9 @@ class String # Creates the name of a table like Rails does for models to table names. This method # uses the +pluralize+ method on the last word in the string. # - # "RawScaledScorer".tableize # => "raw_scaled_scorers" - # "egg_and_ham".tableize # => "egg_and_hams" - # "fancyCategory".tableize # => "fancy_categories" + # 'RawScaledScorer'.tableize # => "raw_scaled_scorers" + # 'egg_and_ham'.tableize # => "egg_and_hams" + # 'fancyCategory'.tableize # => "fancy_categories" def tableize ActiveSupport::Inflector.tableize(self) end @@ -130,12 +166,12 @@ class String # Note that this returns a string and not a class. (To convert to an actual class # follow +classify+ with +constantize+.) # - # "egg_and_hams".classify # => "EggAndHam" - # "posts".classify # => "Post" + # 'egg_and_hams'.classify # => "EggAndHam" + # 'posts'.classify # => "Post" # # Singular names are not handled correctly. # - # "business".classify # => "Busines" + # 'business'.classify # => "Busines" def classify ActiveSupport::Inflector.classify(self) end @@ -143,8 +179,8 @@ class String # Capitalizes the first word, turns underscores into spaces, and strips '_id'. # Like +titleize+, this is meant for creating pretty output. # - # "employee_salary" # => "Employee salary" - # "author_id" # => "Author" + # 'employee_salary' # => "Employee salary" + # 'author_id' # => "Author" def humanize ActiveSupport::Inflector.humanize(self) end @@ -153,10 +189,9 @@ class String # +separate_class_name_and_id_with_underscore+ sets whether # the method should put '_' between the name and 'id'. # - # Examples - # "Message".foreign_key # => "message_id" - # "Message".foreign_key(false) # => "messageid" - # "Admin::Post".foreign_key # => "post_id" + # 'Message'.foreign_key # => "message_id" + # 'Message'.foreign_key(false) # => "messageid" + # 'Admin::Post'.foreign_key # => "post_id" def foreign_key(separate_class_name_and_id_with_underscore = true) ActiveSupport::Inflector.foreign_key(self, separate_class_name_and_id_with_underscore) end |