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class AddFromAndToRangesToSubnets < ActiveRecord::Migration[4.2]
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def up
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add_column :subnets, :from, :string, :limit => 255
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add_column :subnets, :to, :string, :limit => 255
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remove_column :subnets, :ranges
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end
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def down
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add_column :subnets, :ranges, :string, :limit => 255
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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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