1 require 'active_support/inflector' unless defined?(ActiveSupport
::Inflector)
3 module ActiveSupport
#:nodoc:
4 module CoreExtensions
#:nodoc:
6 # String inflections define new methods on the String class to transform names for different purposes.
7 # For instance, you can figure out the name of a database from the name of a class.
9 # "ScaleScore".tableize # => "scale_scores"
11 # Returns the plural form of the word in the string.
13 # "post".pluralize # => "posts"
14 # "octopus".pluralize # => "octopi"
15 # "sheep".pluralize # => "sheep"
16 # "words".pluralize # => "words"
17 # "the blue mailman".pluralize # => "the blue mailmen"
18 # "CamelOctopus".pluralize # => "CamelOctopi"
20 Inflector
.pluralize(self)
23 # The reverse of +pluralize+, returns the singular form of a word in a string.
25 # "posts".singularize # => "post"
26 # "octopi".singularize # => "octopus"
27 # "sheep".singularize # => "sheep"
28 # "word".singularize # => "word"
29 # "the blue mailmen".singularize # => "the blue mailman"
30 # "CamelOctopi".singularize # => "CamelOctopus"
32 Inflector
.singularize(self)
35 # By default, +camelize+ converts strings to UpperCamelCase. If the argument to camelize
36 # is set to <tt>:lower</tt> then camelize produces lowerCamelCase.
38 # +camelize+ will also convert '/' to '::' which is useful for converting paths to namespaces.
40 # "active_record".camelize # => "ActiveRecord"
41 # "active_record".camelize(:lower) # => "activeRecord"
42 # "active_record/errors".camelize # => "ActiveRecord::Errors"
43 # "active_record/errors".camelize(:lower) # => "activeRecord::Errors"
44 def camelize(first_letter
= :upper)
46 when :upper then Inflector
.camelize(self, true)
47 when :lower then Inflector
.camelize(self, false)
50 alias_method
:camelcase, :camelize
52 # Capitalizes all the words and replaces some characters in the string to create
53 # a nicer looking title. +titleize+ is meant for creating pretty output. It is not
54 # used in the Rails internals.
56 # +titleize+ is also aliased as +titlecase+.
58 # "man from the boondocks".titleize # => "Man From The Boondocks"
59 # "x-men: the last stand".titleize # => "X Men: The Last Stand"
61 Inflector
.titleize(self)
63 alias_method
:titlecase, :titleize
65 # The reverse of +camelize+. Makes an underscored, lowercase form from the expression in the string.
67 # +underscore+ will also change '::' to '/' to convert namespaces to paths.
69 # "ActiveRecord".underscore # => "active_record"
70 # "ActiveRecord::Errors".underscore # => active_record/errors
72 Inflector
.underscore(self)
75 # Replaces underscores with dashes in the string.
77 # "puni_puni" # => "puni-puni"
79 Inflector
.dasherize(self)
82 # Removes the module part from the constant expression in the string.
84 # "ActiveRecord::CoreExtensions::String::Inflections".demodulize # => "Inflections"
85 # "Inflections".demodulize # => "Inflections"
87 Inflector
.demodulize(self)
90 # Replaces special characters in a string so that it may be used as part of a 'pretty' URL.
96 # "#{id}-#{name.parameterize}"
100 # @person = Person.find(1)
101 # # => #<Person id: 1, name: "Donald E. Knuth">
103 # <%= link_to(@person.name, person_path %>
104 # # => <a href="/person/1-donald-e-knuth">Donald E. Knuth</a>
105 def parameterize(sep
= '-')
106 Inflector
.parameterize(self, sep
)
109 # Creates the name of a table like Rails does for models to table names. This method
110 # uses the +pluralize+ method on the last word in the string.
112 # "RawScaledScorer".tableize # => "raw_scaled_scorers"
113 # "egg_and_ham".tableize # => "egg_and_hams"
114 # "fancyCategory".tableize # => "fancy_categories"
116 Inflector
.tableize(self)
119 # Create a class name from a plural table name like Rails does for table names to models.
120 # Note that this returns a string and not a class. (To convert to an actual class
121 # follow +classify+ with +constantize+.)
123 # "egg_and_hams".classify # => "EggAndHam"
124 # "posts".classify # => "Post"
126 # Singular names are not handled correctly.
128 # "business".classify # => "Busines"
130 Inflector
.classify(self)
133 # Capitalizes the first word, turns underscores into spaces, and strips '_id'.
134 # Like +titleize+, this is meant for creating pretty output.
136 # "employee_salary" # => "Employee salary"
137 # "author_id" # => "Author"
139 Inflector
.humanize(self)
142 # Creates a foreign key name from a class name.
143 # +separate_class_name_and_id_with_underscore+ sets whether
144 # the method should put '_' between the name and 'id'.
147 # "Message".foreign_key # => "message_id"
148 # "Message".foreign_key(false) # => "messageid"
149 # "Admin::Post".foreign_key # => "post_id"
150 def foreign_key(separate_class_name_and_id_with_underscore
= true)
151 Inflector
.foreign_key(self, separate_class_name_and_id_with_underscore
)
154 # +constantize+ tries to find a declared constant with the name specified
155 # in the string. It raises a NameError when the name is not in CamelCase
156 # or is not initialized.
159 # "Module".constantize # => Module
160 # "Class".constantize # => Class
162 Inflector
.constantize(self)