diff options
Diffstat (limited to 'activesupport/lib/active_support/inflector/methods.rb')
| -rw-r--r-- | activesupport/lib/active_support/inflector/methods.rb | 184 |
1 files changed, 104 insertions, 80 deletions
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb index b642d87d76..fe8a2ac9ba 100644 --- a/activesupport/lib/active_support/inflector/methods.rb +++ b/activesupport/lib/active_support/inflector/methods.rb @@ -22,49 +22,49 @@ module ActiveSupport # pluralized using rules defined for that language. By default, # this parameter is set to <tt>:en</tt>. # - # 'post'.pluralize # => "posts" - # 'octopus'.pluralize # => "octopi" - # 'sheep'.pluralize # => "sheep" - # 'words'.pluralize # => "words" - # 'CamelOctopus'.pluralize # => "CamelOctopi" - # 'ley'.pluralize(:es) # => "leyes" + # pluralize('post') # => "posts" + # pluralize('octopus') # => "octopi" + # pluralize('sheep') # => "sheep" + # pluralize('words') # => "words" + # pluralize('CamelOctopus') # => "CamelOctopi" + # pluralize('ley', :es) # => "leyes" def pluralize(word, locale = :en) apply_inflections(word, inflections(locale).plurals) end - # The reverse of +pluralize+, returns the singular form of a word in a + # The reverse of #pluralize, returns the singular form of a word in a # string. # # If passed an optional +locale+ parameter, the word will be # singularized using rules defined for that language. By default, # this parameter is set to <tt>:en</tt>. # - # 'posts'.singularize # => "post" - # 'octopi'.singularize # => "octopus" - # 'sheep'.singularize # => "sheep" - # 'word'.singularize # => "word" - # 'CamelOctopi'.singularize # => "CamelOctopus" - # 'leyes'.singularize(:es) # => "ley" + # singularize('posts') # => "post" + # singularize('octopi') # => "octopus" + # singularize('sheep') # => "sheep" + # singularize('word') # => "word" + # singularize('CamelOctopi') # => "CamelOctopus" + # singularize('leyes', :es) # => "ley" def singularize(word, locale = :en) apply_inflections(word, inflections(locale).singulars) end - # By default, +camelize+ converts strings to UpperCamelCase. If the argument - # to +camelize+ is set to <tt>:lower</tt> then +camelize+ produces + # Converts strings to UpperCamelCase. + # If the +uppercase_first_letter+ parameter is set to false, then produces # lowerCamelCase. # - # +camelize+ will also convert '/' to '::' which is useful for converting + # Also converts '/' to '::' which is useful for converting # paths to namespaces. # - # 'active_model'.camelize # => "ActiveModel" - # 'active_model'.camelize(:lower) # => "activeModel" - # 'active_model/errors'.camelize # => "ActiveModel::Errors" - # 'active_model/errors'.camelize(:lower) # => "activeModel::Errors" + # camelize('active_model') # => "ActiveModel" + # camelize('active_model', false) # => "activeModel" + # camelize('active_model/errors') # => "ActiveModel::Errors" + # camelize('active_model/errors', false) # => "activeModel::Errors" # # As a rule of thumb you can think of +camelize+ as the inverse of - # +underscore+, though there are cases where that does not hold: + # #underscore, though there are cases where that does not hold: # - # 'SSLError'.underscore.camelize # => "SslError" + # camelize(underscore('SSLError')) # => "SslError" def camelize(term, uppercase_first_letter = true) string = term.to_s if uppercase_first_letter @@ -73,7 +73,7 @@ module ActiveSupport string = string.sub(/^(?:#{inflections.acronym_regex}(?=\b|[A-Z_])|\w)/) { $&.downcase } end string.gsub!(/(?:_|(\/))([a-z\d]*)/i) { "#{$1}#{inflections.acronyms[$2] || $2.capitalize}" } - string.gsub!('/', '::') + string.gsub!(/\//, '::') string end @@ -81,16 +81,17 @@ module ActiveSupport # # Changes '::' to '/' to convert namespaces to paths. # - # 'ActiveModel'.underscore # => "active_model" - # 'ActiveModel::Errors'.underscore # => "active_model/errors" + # underscore('ActiveModel') # => "active_model" + # underscore('ActiveModel::Errors') # => "active_model/errors" # # As a rule of thumb you can think of +underscore+ as the inverse of - # +camelize+, though there are cases where that does not hold: + # #camelize, though there are cases where that does not hold: # - # 'SSLError'.underscore.camelize # => "SslError" + # camelize(underscore('SSLError')) # => "SslError" def underscore(camel_cased_word) - word = camel_cased_word.to_s.gsub('::', '/') - word.gsub!(/(?:([A-Za-z\d])|^)(#{inflections.acronym_regex})(?=\b|[^a-z])/) { "#{$1}#{$1 && '_'}#{$2.downcase}" } + return camel_cased_word unless camel_cased_word =~ /[A-Z-]|::/ + word = camel_cased_word.to_s.gsub(/::/, '/') + word.gsub!(/(?:(?<=([A-Za-z\d]))|\b)(#{inflections.acronym_regex})(?=\b|[^a-z])/) { "#{$1 && '_'}#{$2.downcase}" } word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2') word.gsub!(/([a-z\d])([A-Z])/,'\1_\2') word.tr!("-", "_") @@ -98,26 +99,46 @@ module ActiveSupport word end - # Capitalizes the first word, turns underscores into spaces, and strips a - # trailing '_id' if present. - # Like +titleize+, this is meant for creating pretty output. + # Tweaks an attribute name for display to end users. + # + # Specifically, performs these transformations: + # + # * Applies human inflection rules to the argument. + # * Deletes leading underscores, if any. + # * Removes a "_id" suffix if present. + # * Replaces underscores with spaces, if any. + # * Downcases all words except acronyms. + # * Capitalizes the first word. # # The capitalization of the first word can be turned off by setting the - # optional parameter +capitalize+ to false. - # By default, this parameter is true. + # +:capitalize+ option to false (default is true). # # humanize('employee_salary') # => "Employee salary" # humanize('author_id') # => "Author" # humanize('author_id', capitalize: false) # => "author" + # humanize('_id') # => "Id" + # + # If "SSL" was defined to be an acronym: + # + # humanize('ssl_error') # => "SSL error" + # def humanize(lower_case_and_underscored_word, options = {}) result = lower_case_and_underscored_word.to_s.dup + inflections.humans.each { |(rule, replacement)| break if result.sub!(rule, replacement) } - result.gsub!(/_id$/, "") + + result.sub!(/\A_+/, '') + result.sub!(/_id\z/, '') result.tr!('_', ' ') - result.gsub!(/([a-z\d]*)/i) { |match| + + result.gsub!(/([a-z\d]*)/i) do |match| "#{inflections.acronyms[match] || match.downcase}" - } - result.gsub!(/^\w/) { |match| match.upcase } if options.fetch(:capitalize, true) + end + + if options.fetch(:capitalize, true) + result.sub!(/\A\w/) { |match| match.upcase } + end + result end @@ -127,34 +148,34 @@ module ActiveSupport # # +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" - # 'TheManWithoutAPast'.titleize # => "The Man Without A Past" - # 'raiders_of_the_lost_ark'.titleize # => "Raiders Of The Lost Ark" + # titleize('man from the boondocks') # => "Man From The Boondocks" + # titleize('x-men: the last stand') # => "X Men: The Last Stand" + # titleize('TheManWithoutAPast') # => "The Man Without A Past" + # titleize('raiders_of_the_lost_ark') # => "Raiders Of The Lost Ark" def titleize(word) humanize(underscore(word)).gsub(/\b(?<!['’`])[a-z]/) { $&.capitalize } end - # Create 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. + # 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" + # tableize('RawScaledScorer') # => "raw_scaled_scorers" + # tableize('egg_and_ham') # => "egg_and_hams" + # tableize('fancyCategory') # => "fancy_categories" def tableize(class_name) pluralize(underscore(class_name)) end - # Create a class name from a plural table name like Rails does for table + # Creates a class name from a plural table name like Rails does for table # names to models. Note that this returns a string and not a Class (To - # convert to an actual class follow +classify+ with +constantize+). + # convert to an actual class follow +classify+ with #constantize). # - # 'egg_and_hams'.classify # => "EggAndHam" - # 'posts'.classify # => "Post" + # classify('egg_and_hams') # => "EggAndHam" + # classify('posts') # => "Post" # # Singular names are not handled correctly: # - # 'business'.classify # => "Busines" + # classify('calculus') # => "Calculu" def classify(table_name) # strip out any leading schema name camelize(singularize(table_name.to_s.sub(/.*\./, ''))) @@ -162,17 +183,19 @@ module ActiveSupport # Replaces underscores with dashes in the string. # - # 'puni_puni'.dasherize # => "puni-puni" + # dasherize('puni_puni') # => "puni-puni" def dasherize(underscored_word) underscored_word.tr('_', '-') end # Removes the module part from the expression in the string. # - # 'ActiveRecord::CoreExtensions::String::Inflections'.demodulize # => "Inflections" - # 'Inflections'.demodulize # => "Inflections" + # demodulize('ActiveRecord::CoreExtensions::String::Inflections') # => "Inflections" + # demodulize('Inflections') # => "Inflections" + # demodulize('::Inflections') # => "Inflections" + # demodulize('') # => "" # - # See also +deconstantize+. + # See also #deconstantize. def demodulize(path) path = path.to_s if i = path.rindex('::') @@ -184,13 +207,13 @@ module ActiveSupport # Removes the rightmost segment from the constant expression in the string. # - # 'Net::HTTP'.deconstantize # => "Net" - # '::Net::HTTP'.deconstantize # => "::Net" - # 'String'.deconstantize # => "" - # '::String'.deconstantize # => "" - # ''.deconstantize # => "" + # deconstantize('Net::HTTP') # => "Net" + # deconstantize('::Net::HTTP') # => "::Net" + # deconstantize('String') # => "" + # deconstantize('::String') # => "" + # deconstantize('') # => "" # - # See also +demodulize+. + # See also #demodulize. def deconstantize(path) path.to_s[0, path.rindex('::') || 0] # implementation based on the one in facets' Module#spacename end @@ -199,9 +222,9 @@ module ActiveSupport # +separate_class_name_and_id_with_underscore+ sets whether # the method should put '_' between the name and 'id'. # - # 'Message'.foreign_key # => "message_id" - # 'Message'.foreign_key(false) # => "messageid" - # 'Admin::Post'.foreign_key # => "post_id" + # foreign_key('Message') # => "message_id" + # foreign_key('Message', false) # => "messageid" + # foreign_key('Admin::Post') # => "post_id" def foreign_key(class_name, separate_class_name_and_id_with_underscore = true) underscore(demodulize(class_name)) + (separate_class_name_and_id_with_underscore ? "_id" : "id") end @@ -227,7 +250,7 @@ module ActiveSupport def constantize(camel_cased_word) names = camel_cased_word.split('::') - # Trigger a builtin NameError exception including the ill-formed constant in the message. + # Trigger a built-in NameError exception including the ill-formed constant in the message. Object.const_get(camel_cased_word) if names.empty? # Remove the first blank element in case of '::ClassName' notation. @@ -241,8 +264,8 @@ module ActiveSupport next candidate if constant.const_defined?(name, false) next candidate unless Object.const_defined?(name) - # Go down the ancestors to check it it's owned - # directly before we reach Object or the end of ancestors. + # Go down the ancestors to check if it is owned directly. The check + # stops when we reach Object or the end of ancestors tree. constant = constant.ancestors.inject do |const, ancestor| break const if ancestor == Object break ancestor if ancestor.const_defined?(name, false) @@ -257,8 +280,8 @@ module ActiveSupport # Tries to find a constant with the name specified in the argument string. # - # 'Module'.safe_constantize # => Module - # 'Test::Unit'.safe_constantize # => Test::Unit + # safe_constantize('Module') # => Module + # safe_constantize('Test::Unit') # => Test::Unit # # The name is assumed to be the one of a top-level constant, no matter # whether it starts with "::" or not. No lexical context is taken into @@ -267,21 +290,21 @@ module ActiveSupport # C = 'outside' # module M # C = 'inside' - # C # => 'inside' - # 'C'.safe_constantize # => 'outside', same as ::C + # C # => 'inside' + # safe_constantize('C') # => 'outside', same as ::C # end # # +nil+ is returned when the name is not in CamelCase or the constant (or # part of it) is unknown. # - # 'blargle'.safe_constantize # => nil - # 'UnknownModule'.safe_constantize # => nil - # 'UnknownModule::Foo::Bar'.safe_constantize # => nil + # safe_constantize('blargle') # => nil + # safe_constantize('UnknownModule') # => nil + # safe_constantize('UnknownModule::Foo::Bar') # => nil def safe_constantize(camel_cased_word) constantize(camel_cased_word) rescue NameError => e - raise unless e.message =~ /(uninitialized constant|wrong constant name) #{const_regexp(camel_cased_word)}$/ || - e.name.to_s == camel_cased_word.to_s + raise if e.name && !(camel_cased_word.to_s.split("::").include?(e.name.to_s) || + e.name.to_s == camel_cased_word.to_s) rescue ArgumentError => e raise unless e.message =~ /not missing constant #{const_regexp(camel_cased_word)}\!$/ end @@ -325,10 +348,11 @@ module ActiveSupport private - # Mount a regular expression that will match part by part of the constant. + # Mounts a regular expression, returned as a string to ease interpolation, + # that will match part by part the given constant. # - # const_regexp("Foo::Bar::Baz") # => /Foo(::Bar(::Baz)?)?/ - # const_regexp("::") # => /::/ + # const_regexp("Foo::Bar::Baz") # => "Foo(::Bar(::Baz)?)?" + # const_regexp("::") # => "::" def const_regexp(camel_cased_word) #:nodoc: parts = camel_cased_word.split("::") |