format a string in params

rubyonrails-talk
1

Hi, i've got a problem with slashes "/" : i do a redirect :

redirect_to :action => action, :id => params[:my_param]

but when parameter string params[:my_param] is with slash, for example "16/9", i've got the following error

no route found to match "/controller/action/16/9" with {:method=>:get}

does anybody know a function to format that kind of parameter to get a valid url?

2

Hi, what does 16/9 represent? In any case, you'll need to sanitize, params[:my_param], before you redirect.

Good luck,

-Conrad

3

Thank you for your answer.

I've found a solution : encode parameter. put in the controller header : require 'cgi' before send encode parameter : CGI::escape(params[:my_param]) at reception decode it : CGI::unescape(params[:my_param])

Then, i keep valid url :slight_smile:

4

You don't need to use the CGI escape, Rails gives you the same thing, it is called h (alias for html_escape) that does the same thing.

5

No, html_escape as the same means translate html. To translate url we have to use url_encode :

but i didn't find the way to decode it....

6

Sorry mark i've posted my message at the same time you did

7

No, html_escape as the same means translate html. To translate url we have to use url_encode :http://www.ruby-doc.org/stdlib/libdoc/erb/rdoc/classes/ERB/Util.html

Ah, the u() method, a counterpart to h().

but i didn't find the way to decode it....

Rails decodes URLs automatically. However, if for some reason you needed to do this yourself:

def url_decode(str)      str.to_s.gsub(/%([A-F\d]{2})/in) { [$1.hex].pack('C') } end

- Mark.

8

thank you