|  | class AddOwnerToApplication < ActiveRecord::Migration[4.2]
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							|  |   def change
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							|  |     add_column :oauth_applications, :owner_id, :integer, null: true
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							|  |     add_column :oauth_applications, :owner_type, :string, null: true
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							|  |     add_index :oauth_applications, [:owner_id, :owner_type]
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							|  |   end
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							|  | end |