[Rails] redirect_to with a hash instead of parameters

All,

I have numerous places in my codebase like this:

redirect_to :action => 'schedule_by_uid_and_run_date', :uid =>
@schedule.first.train_uid, :year => @date.year, :month => @date.month,
:day => @date.day

I'd like to replace the :year, :month and :day parameters with a hash
containing the three parameters. @date is an instance of a Date class,
and the trouble with that is Date.month is a single character. I'd like
it to be null-padded, but it seems messy to put .rjust(2, '0') against
all three parameters everywhere in the code.

Is it possible to do something like this?

redirect_to :action => 'foo', :uid => @schedule.first.train_uid,
params_hash

...where params_hash contains { :year => '2011', :month => '01', :day =>
'19' }

Cheers,

Peter

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