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class RemoveUniquenessOfArticleName < ActiveRecord::Migration[4.2]
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def self.up
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remove_index :articles, :name
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add_index :articles, [:name, :supplier_id]
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end
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def self.down
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remove_index :articles, [:name, :supplier_id]
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add_index :articles, :name, :unique => true
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end
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end
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