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class AddUniqueIndexToParameter < ActiveRecord::Migration[4.2]
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def up
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add_index :parameters, [:type, :reference_id, :name], :unique => true
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end
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def down
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# previous version, prior to #8366 and 20141112165600_add_type_to_parameter_index
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remove_index :parameters, :column => [:reference_id, :name] if index_exists? :parameters, [:reference_id, :name], :unique => true
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remove_index :parameters, :column => [:type, :reference_id, :name] if index_exists? :parameters, [:type, :reference_id, :name], :unique => true
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end
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end
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