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require Rails.root.join('lib', 'mastodon', 'migration_helpers')
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class AddEmbedURLToPreviewCards < ActiveRecord::Migration[5.1]
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include Mastodon::MigrationHelpers
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disable_ddl_transaction!
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def up
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safety_assured do
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add_column_with_default :preview_cards, :embed_url, :string, default: '', allow_null: false
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end
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end
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def down
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execute "UPDATE preview_cards SET url=embed_url WHERE embed_url!=''"
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remove_column :preview_cards, :embed_url
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end
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end
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