From 90366a1521659d07a3b75936b3231adeb376f1a4 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Wed, 10 Sep 2008 00:26:50 -0500
Subject: Added Inflector#parameterize for easy slug generation ("Donald E.
 Knuth".parameterize => "donald-e-knuth") #713 [Matt Darby]

---
 activesupport/lib/active_support/inflector.rb | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'activesupport/lib/active_support/inflector.rb')

diff --git a/activesupport/lib/active_support/inflector.rb b/activesupport/lib/active_support/inflector.rb
index 7ae9e0c6ab..e5f0063285 100644
--- a/activesupport/lib/active_support/inflector.rb
+++ b/activesupport/lib/active_support/inflector.rb
@@ -240,6 +240,25 @@ module ActiveSupport
     def demodulize(class_name_in_module)
       class_name_in_module.to_s.gsub(/^.*::/, '')
     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(string, sep = '-')
+      string.gsub(/[^a-z0-9]+/i, sep).downcase
+    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.
-- 
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