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class AddUniqueConstraintToFactName < ActiveRecord::Migration
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def self.up
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remove_index(:fact_names, :column => :name) rescue nil
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options = ActiveRecord::Base.connection.instance_values["config"][:adapter].grep(/mysql/).any? ?
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{ :unique => true, :length => 254 } :
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{ :unique => true }
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add_index(:fact_names, :name, options)
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end
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def self.down
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remove_index(:fact_names, :column => :name)
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end
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end
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