[Zope] How to concatenate variables
Fri, 14 Jun 2002 21:05:15 +0200
McDonnell, Larry writes:
> I am having problems concatenating variables. I have seven pull down menus.
> Selecting one from each menu will create a part number. I setup a test to
> see if this would work. I have one dtml doc with the menus. After a submit
> it calls this dtml doc:
> <form name="form1" method="post" action="">
> <dtml-let pn="' ' ">
> <dtml-call concat_sub_type_to_part_num(st1,sub_type2)>
> <dtml-var st1>st1<dtml-var sub_type2>st2
> <dtml-var expr="pn==st1+sub_type2">
> <dtml-var pn> pn
> I call a python script concat_sub_type_to_part_num and pass two of the menu
> selections in this test. I tried to concat there but no luck. I can only see
> the variables I passed.
Functions are unable to change strings in the callers context.
You need to return the concatenated value.
And you must not use "dtml-call" in this case, as it discards the return