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require 'active_support/inflector/methods'
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"
#
class String
# Returns the plural form of the word in the string.
#
# 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.
#
# ==== Examples
# "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"
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. See ActiveSupport::Inflector.constantize
#
# Examples
# "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
#
# Examples
# "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"
def camelize(first_letter = :upper)
case first_letter
when :upper then ActiveSupport::Inflector.camelize(self, true)
when :lower then ActiveSupport::Inflector.camelize(self, false)
end
end
alias_method :camelcase, :camelize
# Capitalizes all the words and replaces some characters in the string to create
# a nicer looking title. +titleize+ is meant for creating pretty output. It is not
# used in the Rails internals.
#
# +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"
def titleize
ActiveSupport::Inflector.titleize(self)
end
alias_method :titlecase, :titleize
# The reverse of +camelize+. Makes an underscored, lowercase form from the expression in the string.
#
# +underscore+ will also change '::' to '/' to convert namespaces to paths.
#
# "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"
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"
#
# See also +deconstantize+.
def demodulize
ActiveSupport::Inflector.demodulize(self)
end
# Removes the rightmost segment from the constant expression in the string.
#
# "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.
#
# ==== Examples
#
# class Person
# def to_param
# "#{id}-#{name.parameterize}"
# end
# end
#
# @person = Person.find(1)
# # => #<Person id: 1, name: "Donald E. Knuth">
#
# <%= link_to(@person.name, person_path) %>
# # => <a href="/person/1-donald-e-knuth">Donald E. Knuth</a>
def parameterize(sep = '-')
ActiveSupport::Inflector.parameterize(self, sep)
end
# 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"
def tableize
ActiveSupport::Inflector.tableize(self)
end
# Create 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+.)
#
# "egg_and_hams".classify # => "EggAndHam"
# "posts".classify # => "Post"
#
# Singular names are not handled correctly.
#
# "business".classify # => "Busines"
def classify
ActiveSupport::Inflector.classify(self)
end
# 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"
def humanize
ActiveSupport::Inflector.humanize(self)
end
# Creates a foreign key name from a class name.
# +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"
def foreign_key(separate_class_name_and_id_with_underscore = true)
ActiveSupport::Inflector.foreign_key(self, separate_class_name_and_id_with_underscore)
end
end
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