ActiveRecord 4.0.0 does not correctly report changed? for modified 'serialize' attribute

[myitcv]

As shown by the breaking test in this gist

Let me know if you need any more details

[myitcv]

Should have mentioned this:

ruby 1.9.3p448 (2013-06-27 revision 41675) [i686-linux]

[senny]

This is the expected behavior. If you modify the serialized attributes in place there is no way for Active Record to know that. This 144e869 commit introduced that serialized attributes are always written even if they are not dirty.

This is also another issue touching on the same behavior, you can follow the discussion here: #8328 (comment)

[myitcv]

Thanks. Will comment on the other thread