[Twisted-web] Alternative to <nevow:attr>
andrew-twisted at puzzling.org
Tue Oct 19 15:06:11 MDT 2004
On Tue, Oct 19, 2004 at 12:10:37PM -0700, David Reid wrote:
> On Tue, 2004-10-19 at 02:51, Andrew Bennetts wrote:
> > TAL does allow this, in two ways (that I know of):
> > First, there's the hackish way:
> They're both hackish ways in my opinion, and the latter
> Another alternative is for the alternative syntax to not even support
> such behavior, and only be for the general case which would look
> something like this:
> <a nevow:attributes="href=link alt=label"><nevow:slot name="label"
> (Looks an aweful lot like mg's attr.tac example, doesn't it?)
Firstly, I really don't know Nevow, I just lurk on the discussions about it.
I mention ZPT from time-to-time mainly out of selfishness: it would be
easier for me to learn Nevow if it were more like ZPT ;)
Now, on to the reply...
mg's attr.tac has this in the template:
<ul nevow:data="links" nevow:render="sequence">
<li nevow:pattern="item" nevow:render="link"><a href="#" nevow:render="attribute href=link,alt=label"><nevow:slot name="label">label</nevow:slot></a></li>
I don't see what this does that is different to:
<ul tal:repeat="linkinfo context/links">
<li><a href="#" tal:attributes="href linkinfo/link; label linkinfo/label"/></li>
Although I don't totally understand why mg's attr.tac has a nevow:slot tag
for label and not link, as far as I can tell the ZPT I give here is
equivalent in concept. Explanations and/or corrections welcome!
Of course, my ZPT examples requires that the code would require there to be
a linkinfo class, e.g.
def __init__(self, link, label):
self.link = link
self.label = label
And context/links would just be a list of these. I don't see this as being
any more complex than what attr.tac does, though.
If nothing else, I hope this discussion can serve as the basis for a "Nevow for
ZPT users" tutorial.
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