FormHelper's auto_index should use #to_param instead of #id_before_type_cast. Closes #9994 [mattly]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8033 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 3 insertions, 3 deletions

diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index cc81bad2b4..1a3c842271 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -415,10 +415,10 @@ module ActionView
         @template_object, @local_binding = template_object, local_binding
         @object = object
         if @object_name.sub!(/\[\]$/,"")
-          if object ||= @template_object.instance_variable_get("@#{Regexp.last_match.pre_match}") and object.respond_to?(:id_before_type_cast)
-            @auto_index = object.id_before_type_cast
+          if object ||= @template_object.instance_variable_get("@#{Regexp.last_match.pre_match}") and object.respond_to?(:to_param)
+            @auto_index = object.to_param
           else
-            raise ArgumentError, "object[] naming but object param and @object var don't exist or don't respond to id_before_type_cast: #{object.inspect}"
+            raise ArgumentError, "object[] naming but object param and @object var don't exist or don't respond to to_param: #{object.inspect}"
           end
         end
       end