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