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@@ -0,0 +1,19 @@
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+class MigrateSettings < ActiveRecord::Migration
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+ def up
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+ remove_index :settings, [:target_type, :target_id, :var]
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+ rename_column :settings, :target_id, :thing_id
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+ rename_column :settings, :target_type, :thing_type
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+ change_column :settings, :thing_id, :integer, null: true, default: nil
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+ change_column :settings, :thing_type, :string, null: true, default: nil
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+ add_index :settings, [:thing_type, :thing_id, :var], unique: true
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+ end
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+
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+ def down
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+ remove_index :settings, [:thing_type, :thing_id, :var]
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+ rename_column :settings, :thing_id, :target_id
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+ rename_column :settings, :thing_type, :target_type
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+ change_column :settings, :target_id, :integer, null: false
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+ change_column :settings, :target_type, :string, null: false, default: ''
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+ add_index :settings, [:target_type, :target_id, :var], unique: true
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+ end
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+end
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