[Freeswitch-users] empty var expression

[Madovsky]

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 at 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 at 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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