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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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