class ActiveRecord::ConnectionAdapters::SQLite3::SchemaDumper

def prepare_column_options(column)
  spec = super
  if @connection.supports_virtual_columns? && column.virtual?
    spec[:as] = extract_expression_for_virtual_column(column)
    spec[:stored] = column.virtual_stored?
    spec = { type: schema_type(column).inspect }.merge!(spec)
  end
  spec
end