Firebase Security Rules Regex in Path

Question

I have security rule write like this :

 /databases/{database}/documents {

     match /collection_COUNTRY_EN/{docId} {
          allow....
     }

     match /c         


        

Answer 1

Security rules do not support regex in the path match. You can only wildcard on the full name of a path segment.

What you might want to do instead is organize all your common top-level collection into subcollections organized under a known document, and apply the same rules to each of them that way:

match /countries/data/{countryCollection}/{docId} {
    allow...
}

This would apply the same permissions to all country subcollections organized under /countries/data, which can be an empty document, or even a non-existent document.