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module Arel
class Order < Compound
attr_reader :orderings
def initialize(relation, orderings)
super(relation)
@orderings = orderings.collect { |o| o.bind(relation) }
end
# TESTME
def orders
# QUESTION - do we still need relation.orders ?
(orderings + relation.orders).collect { |o| o.bind(self) }.collect { |o| o.to_ordering }
end
def eval
unoperated_rows.sort do |row1, row2|
ordering = orders.detect { |o| o.eval(row1, row2) != 0 } || orders.last
ordering.eval(row1, row2)
end
end
end
end
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