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module Arel
class Action < Compound
def == other
super || self.class === other && @relation == other.relation
end
end
class Deletion < Action
def call
engine.delete(self)
end
end
class Insert < Action
attr_reader :record
def initialize(relation, record)
super(relation)
@record = record.bind(relation)
end
def call
engine.create(self)
end
def == other
super && @record == other.record
end
end
class Update < Insert
alias :assignments :record
def call
engine.update(self)
end
end
end
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