app/lib/active_model/dates.rb
module ActiveModel::Dates
def parse_date(field, attrs)
year, month, day = attrs["#{field}(1i)"], attrs["#{field}(2i)"], attrs["#{field}(3i)"]
return nil if day.blank? || month.blank? || year.blank?
Date.new(year.to_i, month.to_i, day.to_i)
end
def remove_date(field, attrs)
attrs.except("#{field}(1i)", "#{field}(2i)", "#{field}(3i)")
end
end