----- Original Message -----

From: Madovsky

To: FreeSWITCH Users Help

Sent: Monday, January 17, 2011 9:46 PM

Subject: Re: [Freeswitch-users] empty var expression

ok I understoo what's happened.

weirdly with db app apparently if the result of a select is empty

so it will be in fact never empty but a space will be.

so

 

<condition field="${redir_conf}" expression="^ $" break="never">

 

with a space between ^ and $ works

----- Original Message -----

From: Michael Collins

To: FreeSWITCH Users Help

Sent: Monday, January 17, 2011 7:21 PM

Subject: Re: [Freeswitch-users] empty var expression

Where is this variable getting or losing the "undef" value? Also, add this line to info and see what gets printed:

<action application="log" data="WARNING $var contains '${var}'"/>

That will print it out in purple letters to make it easier to see. FWIW, I tried this with various permutations of 'undefined' channel vars and expression="^$" always worked for me.

-MC

On Mon, Jan 17, 2011 at 3:55 PM, Madovsky <infos@madovsky.org> wrote:

yes, I can see UNDEF

----- Original Message -----

From: Michael Collins

To: FreeSWITCH Users Help

Sent: Monday, January 17, 2011 2:34 PM

Subject: Re: [Freeswitch-users] empty var expression

Is the var showing up as "UNDEF" when you send the call to the info app?

-MC

On Fri, Jan 14, 2011 at 12:22 PM, Madovsky <infos@madovsky.org> wrote:

I tried this for an var marked as "UNDEF" in log

 

<condition field="${var}" expression="^UNDEF$" break="never">

<condition field="${var}" expression="UNDEF" break="never">

<condition field="${var}" expression="undef" break="never">

<condition field="${var}" expression="^undef$" break="never">

<condition field="${var}" expression="" break="never">

<condition field="${var}" expression="^$" break="never">

<condition field="${var}" expression="[UNDEF]" break="never">

<condition field="${var}" expression="[]" break="never">

 

without success.

which is the right expression for empty var please ?

 

Thanks

 

 

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