Repair numbers converted into string (Rails 4)

repair_nested_params.rb

repair_nested_params({id: '11', age: '25'}) # Sample

def repair_nested_params(obj)
  obj.each { |key, value| obj[key] = parse_value(value) }
end

def parse_value(value)
  return repair_nested_params(value) if value.is_a?(Hash)
  return value.map(&method(:parse_value)) if value.is_a?(Array)
  return value unless value.is_a?(String)

  is_numeric = value.match?(/\A[-+]?\d*\.?\d+\z/)
  return value unless is_numeric

  (value.to_f % 1).positive? ? value.to_f : value.to_i
end