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class AddManagedToHosts < ActiveRecord::Migration
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def self.up
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add_column :hosts, :managed, :boolean
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Host.reset_column_information
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for host in Host.all
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host.update_attribute :managed, !!host.operatingsystem_id and !!host.architecture_id and (!!host.ptable_id or not host.disk.empty?)
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end
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end
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def self.down
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remove_column :hosts, :managed
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end
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end
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