[Zope3-dev] Re: Better access to APIs in paths (was Re:
needingviewsclues - template/title troubles)
John D. Heintz
jheintz@isogen.com
25 Feb 2003 14:47:28 -0600
How do custom extensions get registered? I certainly would mind if some
namespace-things were pre-included, but what about "plone:" for example?
John
On Tue, 2003-02-25 at 14:42, Jim Fulton wrote:
> Shane Hathaway wrote:
> > Casey Duncan wrote:
> >
> >> FWIW: Me Three.
> >>
> >> I have no inherent love for XML namespaces, but they are a widely
> >> understood/documented concept that we can readily co-opt for this.
> >>
> >> Perhaps we could define some configurable default set of namespace
> >> declarations made implicitly for all html page templates.
> >>
> >> <beat what="drum">Either that or get the code the hell out of the
> >> templates all together... ;^)</beat>
> >
> >
> > Well, part of what this does is it lets you do many things in templates
> > that formerly required Python expressions. Currency formatting is just
> > scratching the surface.
> >
> > And before we say that presentation details like formatting currency
> > should require a Python script, imagine the following hypothetical
> > future exchange:
> >
> > =======================================
> >
> > [Newbie]
> > I just downloaded Zope today and it's really cool. I made a little
> > checkbook register using a page template. It's way better than PHP. Now
> > I can't figure out how to show only two digits after the decimal point.
> > I don't know Python. Can you help?
> >
> > [Guru]
> > Hmm, you'll have to use some Python. Don't use a Python expression,
> > though, because that would be putting code in your template. Write a
> > script to do it.
> >
> > [Newbie]
> > Can you help me write the script?
> >
> > [Guru]
> > Ok, here you go:
> >
> > from zope.app.servicenames import LocaleService
> > from zope.components import getService
> > def money(context, n):
> > return getService(context, LocaleService).formatCurrency(n)
> >
> > [Newbie]
> > Um, okay. I made the script and I think it works. Now how do I get my
> > template to call it?
> >
> > [Guru]
> > Oops, somehow you have to pass arguments to the script. Dang. Page
> > templates don't provide a way to do that without Python expressions.
> > You'll need a Python expression after all. Try this (replace "value"
> > with whatever variable you're using):
> >
> > <span tal:content="python: container.money(container, value)">
> > $15.00
> > </span>
> >
> > [Newbie]
> > That worked. But it's going to take a long time to figure out that
> > script you sent me.
> >
> > =======================================
> >
> >
> > Now imagine this exchange:
> >
> >
> > =======================================
> >
> > [Newbie]
> > I just downloaded Zope today and it's really cool. I made a little
> > checkbook register using a page template. It's way better than PHP. Now
> > I can't figure out how to show only two digits after the decimal point.
> > I don't know Python. Can you help?
> >
> > [Guru]
> > Use the string formatting API. Try this (replace "value" with whatever
> > variable you're using):
> >
> > <div tal:namespaces="sf zope:string-fmt">
> > <span tal:content="value/sf:money">$15.00</span>
> > </div>
> >
> > [Newbie]
> > Hey, neat, that makes sense. But do I have to write "tal:namespaces"
> > each time I use "sf:money"?
> >
> > [Guru]
> > You can put tal:namespaces at the top of your template. It applies to
> > all contained elements.
> >
> > [Newbie]
> > Oh, okay. I guess that means I could write it this way too:
> >
> > <span tal:namespaces="sf zope:string-fmt"
> > tal:content="value/sf:money">$15.00</span>
> >
> > [Guru]
> > Yep. I think I'll add a recipe to zopelabs.com.
> >
> > [Newbie]
> > Don't bother, this is easy enough. Thanks!
> >
> > =======================================
>
> Now, imagine this exchange:
>
> [Newbie]
> I just downloaded Zope today and it's really cool. I made a little
> checkbook register using a page template. It's way better than PHP. Now
> I can't figure out how to show only two digits after the decimal point.
> I don't know Python. Can you help?
>
> [Guru]
> Use the string formatting API. Try this (replace "value" with whatever variable you're using):
>
> <span tal:content="value/sf:money">$15.00</span>
>
> [Newbie]
> Hey, neat, that makes sense.
>
> (feels like groundhog day)
>
> >
> > 'nuff said.
>
> Yup. :)
>
> I really don't think that the declaration adds anything but ceremony in your example.
>
> Jim
>
>
> --
> Jim Fulton mailto:jim@zope.com Python Powered!
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>
>
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John D. Heintz | Senior Developer
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