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class AddFromAndToRangesToSubnets < ActiveRecord::Migration
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def self.up
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add_column :subnets, :from, :string
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add_column :subnets, :to, :string
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remove_column :subnets, :ranges
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end
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def self.down
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add_column :subnets, :ranges, :string
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remove_column :subnets, :to
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remove_column :subnets, :from
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end
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end
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