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class CreatePermalinks < ActiveRecord::Migration[4.2]
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def change
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create_table :permalinks do |t|
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t.string :url, null: false
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t.integer :topic_id
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t.integer :post_id
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t.integer :category_id
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t.timestamps null: false
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end
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add_index :permalinks, :url
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end
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end
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