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-rw-r--r--railties/configs/initializers/new_rails_defaults.rb5
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diff --git a/railties/configs/initializers/new_rails_defaults.rb b/railties/configs/initializers/new_rails_defaults.rb
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+# These settins change the behavior of Rails 2 apps and will be defaults
+# for Rails 3. You can remove this initializer when Rails 3 is released.
+
+# Only save the attributes that have changed since the record was loaded.
+ActiveRecord::Base.partial_updates = true