[Zope] <dtml-in> problem with defined or not defined variable as parameter

[Johan Carlsson]

Patrick Ulmer wrote:
> Hi,
> 
>>> I want to do something like that:
>>>
>>> <dtml-if id_historie>
>>> <dtml-in expr="dbSelect(id_historie=_.str(id_historie))">
>>> <dtml-else>
>>> <dtml-in expr="dbSelect(id_historie=_.str(0))">
>>> <dtml-if>
>>>
>>> [...]
>>>
>>> </dtml-in>
>>>
>>> but I get the error " unexpected end tag, for tag </dtml-in>". How 
>>> can I query my database depending on having id_historie defined or 
>>> not? Can somebody give me a hint?
>>
>>
>>
>> In the exaple above I would set id_historie in a <dtml-let> tag:
>>
>> <dtml-let id_historie="id_historie or 0">
>> <dtml-in expr="dbSelect(id_historie=_.str(id_historie))">
>> ...
>> </dtml-in>
>> </dtml-let>
> 
> 
> 
> Sorry, but now I got the error "global name 'id_historie' is not
> defined" in line <dtml-let....>.

<dtml-let id_historie="_.getattr(_, 'id_historie', 0)">

or

<dtml-let id_historie="_.has_key('id_historie') and id_historie or 0)">


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