How to use the method from the model in to_json only?

Question

Created nice_title method in model:

 def nice_title title.titleize end

How can I use it now in to_json(only: ...) ?

Just the title works, but nice_title simply ignored.

@ D-side I apologize for not answering for so long. Now I got to this site again. :methods also did not help. Nothing changed. - Colibri
@ D-side Lying :) Changed. :methods must be used separately from :only . :only is responsible for default table fields. - Colibri

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