[Zope] Error Value: sequence-var-get_size

[Dieter Maurer]

Zoper writes:
 > ...
 >     <dtml-var sequence-var-get_size> bytes</td> <td>
 > ...
 > 
 > but whenever I try to run it I get an ugly Zope message:
 >         "This resource may be trying to reference a nonexistent object or
 > variable sequence-var-get_size".
 > What is the problem?
There are objects that do not have a "get_size" method (e.g. Folder,
Database Adapter, External Methods).

Check whether it exists before you use it.

      <dtml-if sequence-var-get_size>
        <dtml-var sequence-var-get_size> bytes
      </dtml-if>

This will give you nothing for objects with size 0.
But, this might not be a problem for you.

If it is, you must use '<dtml-if expr="_.has_key('sequence-var-get_size')">'.


Dieter