Rails Pretty URL with Decimals

I have a rails application that allows searches using longitude and latitude. I have added a 'pretty' route with:

map.connect 'stores/near/:longitude/:latitude', :controller => 'stores', :action => 'index'

This works for integer latitude 开发者_运维知识库and longitude values (http://localhost:3000/stores/near/-88/49) but fails for decimal values (http://localhost:3000/stores/near/-88.341/49.123) giving:

Routing Error

No route matches "/stores/near/-88/49.0" with {:method=>:get}

Any ideas how to use pretty URLs in rails with decimals?

---

Use the :requirements => { :param_name => pattern_regex } param.

DECIMAL_PATTERN = /\A-?\d+(\.\d+)\z/.freeze
map.connect 'stores/near/:longitude/:latitude', 
  :controller => 'stores', :action => 'index',
  :requirements => { :longitude => DECIMAL_PATTERN, :latitude => DECIMAL_PATTERN }

Parameters with dots on the URI