dynamic dropdown list with a condition

Hi.

I'm using ChronoForm 5.
I would like to display in a dropdown list all my content included in a specific category.
For the moment, with the action "DB read", my select shows all my content (id and title) in table joomla_content.
I would like to add a condition "WHERE catid = xx" to the SQL request.

How to do this ?
Thanks for your help.

Hi ChDUP,

Use the Conditions box in the DB Read action. You will need a condition like:

<?php
return array('catid' => 'xx');
?>

Bob

Thanks GreyHead.
But I've already tried, and it just write

< ?php
return array('catid' => 31);
?>

in the front office, above the front.
And my dropdown isn't affected.
I've tried with and without the "<?php ... ?>" code.
I don't understand how conditions works.

Oh, no it's my fault, I haven't see the space too.
I made the same mistake in my first try, for sure.
It's because there's an extra space in the admin, in the sample, just bottom the conditions box.
So, copy-past are wrongs !

Thanks !