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class ChangeVlanToInt < ActiveRecord::Migration[5.1]
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def up
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Subnet.unscoped.where(vlanid: "").update_all(vlanid: nil)
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opts = (connection.adapter_name.downcase == 'postgresql') ? {using: 'vlanid::integer'} : {}
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change_column :subnets, :vlanid, :integer, opts
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end
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def down
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change_column :subnets, :vlanid, :string
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end
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end
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