[Zope] Lines data type possible in boolean OR's?

[Alexander Limi]

Hi,

I have a small problem. When I use the lines data type in OR statements, I
get an

Error Type: TypeError
Error Value: bad operand type(s) for |

I've used them earlier on integers, like this:

<dtml-if "cabinDouble | cabinTwin | cabinBunk | cabinPullman">

and it works fine. When I try the same with other data types, like this:

<dtml-if "toy | additionalToys">

where "toy" is a "multiple select" type and "additionalToys" is a "lines"
type. Can anyone provide me with some hints on what to do to get it working
the way I want? Is typecasting necessary?

Thanks in advance.


Alexander.
PS: please CC me if you answer :)