Add attr_readonly to specify columns that are skipped during a normal ActiveRecord #save operation. Closes #6896 [dcmanges]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7693 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 5 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index e269775fd5..1ec7d6021f 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -841,7 +841,11 @@ module ActiveRecord
           module_eval(
             "before_destroy '#{reflection.name}.class.decrement_counter(\"#{cache_column}\", #{reflection.primary_key_name})" +
             " unless #{reflection.name}.nil?'"
-          )          
+          )
+          
+          module_eval(
+            "#{reflection.class_name}.send(:attr_readonly,\"#{cache_column}\".intern) if defined?(#{reflection.class_name})"
+          )
         end
       end