Add ActiveRecord::Errors#to_xml

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4243 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Add ActiveRecord::Errors#to_xml [Jamis Buck]
+
 * Properly quote index names in migrations (closes #4764) [John Long]
 
 * Fix the HasManyAssociation#count method so it uses the new ActiveRecord::Base#count syntax, while maintaining backwards compatibility.  [Rick]

activerecord/lib/active_record/validations.rb

@@ -156,6 +156,18 @@ def size
     
     alias_method :count, :size
     alias_method :length, :size
+
+    # Return an XML representation of this error object.
+    def to_xml(options={})
+      options[:root] ||= "errors"
+      options[:indent] ||= 2
+      options[:builder] ||= Builder::XmlMarkup.new(:indent => options[:indent])
+
+      options[:builder].instruct! unless options.delete(:skip_instruct)
+      options[:builder].errors do |e|
+        full_messages.each { |msg| e.error(msg) }
+      end
+    end
   end
 
 

activerecord/test/validations_test.rb

@@ -995,6 +995,15 @@ def test_validates_associated_missing
     r.topic = Topic.find :first
     assert r.valid?
   end
+
+  def test_errors_to_xml
+    r = Reply.new :title => "Wrong Create"
+    assert !r.valid?
+    xml = r.errors.to_xml(:skip_instruct => true)
+    assert_equal "<errors>", xml.first(8)
+    assert xml.include?("<error>Title is Wrong Create</error>")
+    assert xml.include?("<error>Content Empty</error>")
+  end
 end