Added a :camelize option to ActiveRecord and Hash to_xml serialization and from_xml deserialization

Signed-off-by: Michael Koziarski <michael@koziarski.com>

activerecord/lib/active_record/serializers/xml_serializer.rb

@@ -23,11 +23,12 @@ module ActiveRecord #:nodoc:
     #   </topic>
     #
     # This behavior can be controlled with <tt>:only</tt>, <tt>:except</tt>,
-    # <tt>:skip_instruct</tt>, <tt>:skip_types</tt> and <tt>:dasherize</tt>.
+    # <tt>:skip_instruct</tt>, <tt>:skip_types</tt>, <tt>:dasherize</tt> and <tt>:camelize</tt> .
     # The <tt>:only</tt> and <tt>:except</tt> options are the same as for the
     # +attributes+ method. The default is to dasherize all column names, but you
-    # can disable this setting <tt>:dasherize</tt> to +false+. To not have the
-    # column type included in the XML output set <tt>:skip_types</tt> to +true+.
+    # can disable this setting <tt>:dasherize</tt> to +false+. Setting <tt>:camelize</tt>
+    # to +true+ will camelize all column names - this also overrides <tt>:dasherize</tt>.
+    # To not have the column type included in the XML output set <tt>:skip_types</tt> to +true+.
     #
     # For instance:
     #
@@ -178,13 +179,22 @@ module ActiveRecord #:nodoc:
 
     def root
       root = (options[:root] || @record.class.to_s.underscore).to_s
-      dasherize? ? root.dasherize : root
+      reformat_name(root)
     end
 
     def dasherize?
       !options.has_key?(:dasherize) || options[:dasherize]
     end
 
+    def camelize?
+      options.has_key?(:camelize) && options[:camelize]
+    end
+
+    def reformat_name(name)
+      name = name.camelize if camelize?
+      dasherize? ? name.dasherize : name
+    end
+
     def serializable_attributes
       serializable_attribute_names.collect { |name| Attribute.new(name, @record) }
     end
@@ -212,7 +222,7 @@ module ActiveRecord #:nodoc:
 
     def add_tag(attribute)
       builder.tag!(
-        dasherize? ? attribute.name.dasherize : attribute.name,
+        reformat_name(attribute.name),
         attribute.value.to_s,
         attribute.decorations(!options[:skip_types])
       )
@@ -220,8 +230,7 @@ module ActiveRecord #:nodoc:
 
     def add_associations(association, records, opts)
       if records.is_a?(Enumerable)
-        tag = association.to_s
-        tag = tag.dasherize if dasherize?
+        tag = reformat_name(association.to_s)
         if records.empty?
           builder.tag!(tag, :type => :array)
         else

activerecord/test/cases/xml_serialization_test.rb

@@ -31,6 +31,13 @@ class XmlSerializationTest < ActiveRecord::TestCase
     assert_match %r{<created_at},     @xml
   end
 
+  def test_should_allow_camelized_tags
+    @xml = Contact.new.to_xml :root => 'xml_contact', :camelize => true
+    assert_match %r{^<XmlContact>},  @xml
+    assert_match %r{</XmlContact>$}, @xml
+    assert_match %r{<CreatedAt},    @xml
+  end
+
   def test_should_include_yielded_additions
     @xml = Contact.new.to_xml do |xml|
       xml.creator "David"

activesupport/lib/active_support/core_ext/hash/conversions.rb

@@ -94,8 +94,7 @@ module ActiveSupport #:nodoc:
           options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
                                    :root => "hash" })
           options[:builder].instruct! unless options.delete(:skip_instruct)
-          dasherize = !options.has_key?(:dasherize) || options[:dasherize]
-          root = dasherize ? options[:root].to_s.dasherize : options[:root].to_s
+          root = rename_key(options[:root].to_s, options)
 
           options[:builder].__send__(:method_missing, root) do
             each do |key, value|
@@ -122,7 +121,7 @@ module ActiveSupport #:nodoc:
                   else
                     type_name = XML_TYPE_NAMES[value.class.name]
 
-                    key = dasherize ? key.to_s.dasherize : key.to_s
+                    key = rename_key(key.to_s, options)
 
                     attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
                     if value.nil?
@@ -142,9 +141,16 @@ module ActiveSupport #:nodoc:
 
         end
 
+        def rename_key(key, options = {})
+          camelize = options.has_key?(:camelize) && options[:camelize]
+          dasherize = !options.has_key?(:dasherize) || options[:dasherize]
+          key = key.camelize if camelize
+          dasherize ? key.dasherize : key
+        end
+
         module ClassMethods
           def from_xml(xml)
-            typecast_xml_value(undasherize_keys(XmlMini.parse(xml)))
+            typecast_xml_value(unrename_keys(XmlMini.parse(xml)))
           end
 
           private
@@ -210,15 +216,15 @@ module ActiveSupport #:nodoc:
               end
             end
 
-            def undasherize_keys(params)
+            def unrename_keys(params)
               case params.class.to_s
                 when "Hash"
                   params.inject({}) do |h,(k,v)|
-                    h[k.to_s.tr("-", "_")] = undasherize_keys(v)
+                    h[k.to_s.underscore.tr("-", "_")] = unrename_keys(v)
                     h
                   end
                 when "Array"
-                  params.map { |v| undasherize_keys(v) }
+                  params.map { |v| unrename_keys(v) }
                 else
                   params
               end

activesupport/test/core_ext/hash_ext_test.rb

@@ -403,6 +403,13 @@ class HashToXmlTest < Test::Unit::TestCase
     assert xml.include?(%(<name>David</name>))
   end
 
+  def test_one_level_camelize_true
+    xml = { :name => "David", :street_name => "Paulina" }.to_xml(@xml_options.merge(:camelize => true))
+    assert_equal "<Person>", xml.first(8)
+    assert xml.include?(%(<StreetName>Paulina</StreetName>))
+    assert xml.include?(%(<Name>David</Name>))
+  end
+
   def test_one_level_with_types
     xml = { :name => "David", :street => "Paulina", :age => 26, :age_in_millis => 820497600000, :moved_on => Date.new(2005, 11, 15), :resident => :yes }.to_xml(@xml_options)
     assert_equal "<person>", xml.first(8)