unlang

[Herwin Weststrate]

On 15-04-15 10:52, Peter Balsianok wrote:
> Hi,
> 
> I have following unlang code in the preacct section
> 
> update request {
>     Calling-Station-Id := "%{%{string:Class}:-%{Calling-Station-Id}}"
> }
> 
> If my packet does not contain Class attribut, i expect that
> Calling-Station-Id will not change.

Then you have to test for that first

if (request:Class) {
  update request {
    Calling-Station-Id := "%{string:Class}"
  }
}

Since we can be sure a Class attribute exists, we can skip the fallback
to Calling-Station-Id

-- 
Herwin Weststrate