class Ransack::Search

def add_scope(key, args)
  sanitized_args = if Ransack.options[:sanitize_scope_args] && !@context.ransackable_scope_skip_sanitize_args?(key, @context.object)
    sanitized_scope_args(args)
  else
    args
  end
  if @context.scope_arity(key) == 1
    @scope_args[key] = args.is_a?(Array) ? args[0] : args
  else
    @scope_args[key] = args.is_a?(Array) ? sanitized_args : args
  end
  @context.chain_scope(key, sanitized_args)
end