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module Arel
class Where < Compound
attr_reader :predicate
def initialize(relation, *predicates)
predicate = predicates.shift
@relation = predicates.empty?? relation : Where.new(relation, *predicates)
@predicate = predicate.bind(@relation)
end
def wheres
@wheres ||= (relation.wheres + [predicate]).collect { |p| p.bind(self) }
end
def ==(other)
Where === other and
relation == other.relation and
predicate == other.predicate
end
end
end
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