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Lennart Regebro wrote:
> On 10/17/05, yuppie <[EMAIL PROTECTED]> wrote:
>>I know that pattern, but I don't like it. [...]
>>The code on the goldegg-folder_contents branch processes the input in
>>the __call__ method of the view class. The template is only invoked if
>>needed. It's much cleaner to use the template just for displaying
>>results, not for triggering controllers.
> That's purely a matter of taste. From a principal standpoint I don't
> think there is any difference, really.
I think we might be able to come up with a heuristic for choosing
between the two patterns (this might be a mini pattern language, if
- For "simple" forms, which redisplay themselves even after a
successful POST, and which do not redirect, prefer a template-driven
version, and make the form self-posting; in ZCML, use <browser:page>
with the 'template' attribute). The classic 'document_edit' form
fits this bill, I think.
- If you have to add logic to the template to cope with possible
redirects, then publish a method of the view, and have the view
redirect or return a template; in ZCML, use <browser:page> with
the 'attribute' variant. "Add" forms fit this pattern, as well
as the folder_contents stuff that Yuppie has done.
- For a set of inter-related pages sharing common view logic,
you may end up mixing and matching -- the ':method' bit on submit
button names is a way to get "off" the original template when
needed. ZCML for this case may either be a mixture of the
'template' and 'attribute' variants of <browser:page>, or else
<brower:view> with several <page> subdirectives.
How does that sound?
Tres Seaver +1 202-558-7113 [EMAIL PROTECTED]
Palladion Software "Excellence by Design" http://palladion.com
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