Thanks Jonathan for the quick answer. I'll give them a try. Larry Small Business Services wrote:
<snip> From: Larry McDonnell
I need some advice. I still use dtml calls in my systems. My problem is if the user is searching for a record but the record is not found. The call is as follows:
<dtml-call "REQUEST.set('serial_number', serial_number)">
<dtml-in lookup_header_record> <dtml-call "REQUEST.set('equip_type', equip_type)"> <dtml-call "REQUEST.set('pr', pr)"> </dtml-in>
If the record is not found I get this error:
Error Type: KeyError Error Value: equip_type
True statement since there is not record and further in the form I am trying to output this variable. Are there any examples that either traps for an error or python script that can also lookup the record and true a found/not found status. </snip>
A couple of possibilities
<dtml-call "REQUEST.set('equip_type', REQUEST.get('equip_type', 'None') )"> This REQUEST.get will return 'None' (or whatever value you assign) if 'equip_type' is not found
or
<dmtl-if "REQUEST.has_key('equip_type')"> <dtml-call "REQUEST.set('equip_type', equip_type)"> </dtml-if> This will only do the assignment if 'equip_type' exists.
The above can be done in dtml or python script.
HTH
Jonathan