[Zope] Re: brain hurts regarding dynamic fcn args in Python

[Hung Jung Lu]

--- In zope@egroups.com, jeff@s... ("Jeff Sasmor") wrote:
><dtml-in
>"Catalog.searchResults(meta_type='EventDoc',event_date=[first,last],event_date_usage='range:min:max',sort_on='event_date
>')">
>   ....
>
>Now if the 'moderated' property is active I want to add the keyword arg
>
>reviewed='on'
>
>to the arg list at the time that the searchResults method is invoked.

Hmm... I have had to do something similar recently. But I did not use 
dynamical argument list. If your choices are simple enough, you could do:

------------------------------------------------------

<dtml-if "moderated == 'active'">

<dtml-in 
"Catalog.searchResults(meta_type='EventDoc',event_date=[first,last],event_date_usage='range:min:max',review='on',sort_on='event_date
>')">
  <dtml-var shared_dtml>
<dtml-in>

<dtml-else>

<dtml-in 
"Catalog.searchResults(meta_type='EventDoc',event_date=[first,last],event_date_usage='range:min:max',sort_on='event_date
>')">
  <dtml-var shared_dtml>
<dtml-in>

</dtml-if>

------------------------------------------------------

Yes, the shared_dtml will still have full access to all the "sequence-item" 
type of variables.

If you have to check more than a few properties, then the above construction 
might not be so good.

If you can always pass a value to a keyword argument, then it's best to use 
an aux variable and preset the value of the argument.

<dtml-if "moderated == 'active'">
  <dtml-call "REQUEST.set('review', 'on')">
<dtml-else>
  <dtml-call "REQUEST.set('review', 'off')">
</dtml-if>

<dtml-in 
"Catalog.searchResults(meta_type='EventDoc',event_date=[first,last],event_date_usage='range:min:max',review=review,sort_on='event_date
>')">
...
</dtml-in>

Hung Jung

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