Added option to String#camelize to generate lower-cased camel case by passing in :lower, like "super_man".camelize(:lower) # => "superMan" [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3986 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

4 files changed, 27 insertions, 5 deletions

diff --git a/activesupport/CHANGELOG b/activesupport/CHANGELOG
index 9217ed99d2..e07feb55a0 100644
--- a/activesupport/CHANGELOG
+++ b/activesupport/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Added option to String#camelize to generate lower-cased camel case by passing in :lower, like "super_man".camelize(:lower) # => "superMan" [DHH]
+
 * Added Hash#diff to show the difference between two hashes [Chris McGrath]
 
 * Fixed HashWithIndifferentAccess#delete to work with both symbols and strings #2176 [Caio Chassot]
diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb
index eef8a5bc89..07291032a6 100644
--- a/activesupport/lib/active_support/core_ext/string/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/string/inflections.rb
@@ -12,8 +12,11 @@ module ActiveSupport #:nodoc:
           Inflector.singularize(self)
         end
 
-        def camelize
-          Inflector.camelize(self)
+        def camelize(first_letter = :upper)
+          case first_letter
+            when :upper then Inflector.camelize(self, true)
+            when :lower then Inflector.camelize(self, false)
+          end
         end
         alias_method :camelcase, :camelize
 
diff --git a/activesupport/lib/active_support/inflector.rb b/activesupport/lib/active_support/inflector.rb
index 43620757c2..ce36d3ef54 100644
--- a/activesupport/lib/active_support/inflector.rb
+++ b/activesupport/lib/active_support/inflector.rb
@@ -109,8 +109,12 @@ module Inflector
     end
   end
 
-  def camelize(lower_case_and_underscored_word)
-    lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
+  def camelize(lower_case_and_underscored_word, first_letter_in_uppercase = true)
+    if first_letter_in_uppercase
+      lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
+    else
+      lower_case_and_underscored_word.first + camelize(lower_case_and_underscored_word)[1..-1]
+    end
   end
 
   def titleize(word)
diff --git a/activesupport/test/inflector_test.rb b/activesupport/test/inflector_test.rb
index 12976a6d92..c0a2b76a5a 100644
--- a/activesupport/test/inflector_test.rb
+++ b/activesupport/test/inflector_test.rb
@@ -110,7 +110,14 @@ class InflectorTest < Test::Unit::TestCase
     "Product"               => "product",
     "SpecialGuest"          => "special_guest",
     "ApplicationController" => "application_controller",
-    "Area51Controller"      => "area51_controller",
+    "Area51Controller"      => "area51_controller"
+  }
+
+  UnderscoreToLowerCamel = {
+    "product"                => "product",
+    "special_guest"          => "specialGuest",
+    "application_controller" => "applicationController",
+    "area51_controller"      => "area51Controller"     
   }
   
   CamelToUnderscoreWithoutReverse = {
@@ -308,4 +315,10 @@ class InflectorTest < Test::Unit::TestCase
       assert_equal(underscored, Inflector.underscore(Inflector.dasherize(underscored)))
     end
   end
+
+  def test_underscore_to_lower_camel
+    UnderscoreToLowerCamel.each do |underscored, lower_camel|
+      assert_equal(lower_camel, Inflector.camelize(underscored, false))
+    end
+  end
 end