Custom htaccess 301 redirect with regexp

Question

I want to move pages from source url:

http://mysite.fr/topic/15530-fermeture-de-lapplication-sur-run/

to target url:

http://mysite.fr/index.php?p=discussion/15530/fermeture-de-lapplication-sur-run/

I tried this without success:

RedirectMatch 301 ^/topic/([0-9]+)-(.+?)$ /index.php?p=discussion/$1/$2

What did I miss ? Thanks in advance.

For info, this raw redirect is working:

Redirect 301 /topic/15530-fermeture-de-lapplication-sur-run/ /index.php?p=discussion/15530/fermeture-de-lapplication-sur-run/

Answer 1

Try this:

RedirectMatch 301 ^/topic/([0-9]+)-([^/]+/)$