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module Arel
class Order < Compound
attr_reader :ordering
def initialize(relation, *orders)
ordering = orders.pop
@relation = orders.empty?? relation : Order.new(relation, *orders)
@ordering = ordering.bind(@relation)
end
def ==(other)
self.class == other.class and
relation == other.relation and
ordering == other.ordering
end
def orders
relation.orders + [ordering]
end
end
end
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