Rails dates with JSON - Part 2

I'm successfully using a duck punch to reformat the date returned by datetime, based on the helpful response given to someone else's question here:

rails dates with json

I'm now trying to do a very similar thing for a date object (rather than datetime), so I've开发者_StackOverflow社区 modified the patch as follows:

class ActiveSupport::Date        # I've changed TimeWithZone to Date
    def as_json(options = {})
        strftime('%Y')
    end
end

...but it's not working (the date format is unchanged from the default 2011-02-03).

Any hints on how to get this going much appreciated.

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The Date object does not contain the hour, minute and second attributes you are wishing to format. DateTime and Time objects do, as you already know.