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mastodon/db/migrate/20171130000000_add_embed_url_to_preview_cards.rb

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2017-12-07 03:37:43 +01:00
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