Rails core - Mar 2014 - I can not use find_each to write huge csv because find_in_batch ignores order scope.

This is a feature request.


I can not use ActiveRecord::Batches#find_each to write huge csv because 
find_in_batch ignores order scope.

find_in_batch's note say:

# NOTE: It's not possible to set the order. That is automatically set to
# ascending on the primary key ("id ASC") to make the batch ordering
# work.

OK.
But I want to use this method to output csv too, because I want to cut 
memory space.

I have an idea to solve this:

   - find_each and find_by_batch method receive :use_order_scope option.

How about this?

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