[Rails] Customizing errors

Hello fellow Rails devs,

I had a slight problem with validation messages. I had a Post AR model
that has an :author_name attribute.

Now if a validation goes wrong, I would like the message to say: "Name
of author can't be blank" as opposed to "author name can't be blank".

I have tried looking into the Rails Guides for I18n #5 but it seems
error.full_messages does not call human_attribute_name on the
attribute before rendering the message. So I created a workaround
which I have shared http://igbanam.wordpress.com/2011/10/25/customizing-error-messages-in-rails/

Comments and constructive criticisms please.

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