[cgreen]>
I have a dtml script which receives a form variable "field_topic", which is a list of the topic property or properties of the document or documents within a folder, and performs actions based upon the values in this list. The code is thus:
<dtml-with REQUEST> <dtml-in field_topic> <dtml-let topik=sequence-item> <table border="1"> <dtml-in expr="PARENTS[0].objectValues(['STX_Document'])" sort="topic,title"> <dtml-if "topic == topik"> ........
If there are two or more elements in "fileld_topic", all is well. However, if "field_topic" contains only one element, I get the following error message:
The reason you can't detect the non-list condition with your code is because _.len(form_variable), the form_variable being a string, probably has a length greater than 1. The easiest way to deal with this is to rename the form element, by adding ":list" to its name. This causes Zope to return a list even if there is only one element. Then you won't have a problem. Cheers, Tom P