N. Thomas wrote at 2003-3-4 23:18 -0500:
* Dieter Maurer <dieter@handshake.de> [2003-03-03 20:56:46 +0100]:
N. Thomas wrote at 2003-3-1 23:46 -0500:
We have a script that generates TAL. The problem is that the content is not being interpeted as TAL by Zope, but rather as raw HTML.
You must make a Page Template object from your TAL source code, wrap it in an appropriate context (--> "__of__") and return it (or call it to let it render).
You can do this only in an External Method (or other filesystem based code).
Well, this was a start in the right direction. But after wading through the archives, the nearest solution I can cruft together is an external method like this:
from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
def talgen():
zptstr = \ """ <html> <body> If properlu rendered, this sentence <b tal:omit-tag="">should contain no tags.</b> </body> </html> """
zptid = 'foobar' z = ZopePageTemplate(id=zptid, text=zptstr, content_type="text/html") return z
But this returns an error, probably because I'm stabbing in the dark.
Because, you did not do the "__of__" magic... And, please remember, read error messages (Error Type, Error Values *AND* traceback) carefully and report them, if you do not understand them.
Also, I have no idea where exactly to stick the "__of__" method. (I did look at the relevant sections in http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html though.)
Hm, you did not find the "__of__" mentioned in the "Name lookup section"? You use "return z.__of__(self)"
My questions:
Where is the API for Products.PageTemplates.ZopePageTemplate documented?
I am not sure, probably in the embedded online help. *BUT* you need nothing than the constructor (you already used) and the "__call__" method (that is trivial).
In Products.PageTemplates, should I use PageTemplate, or PageTemplateFile, or ZopePageTemplate?
As it is not a file in the file system, you do not use "PageTemplateFile" ;-) Almost surely, "ZopePageTemplate" is right. "PageTemplate" might work, too.
In the code above, I see that ZopePageTemplate requires that an id be passed in, does that mean that I have to create a temporary ZPT object in the Zope filesystem, return that, and somehow make sure it is destroyed afterwards? I only passed in 'foobar' because it was required.
No, unless you use special operations (e.g. "template/absolute_url") what you probably do not do.
Also, if anyone could point me to a fragment of code that does something similar it would be much appreciated.
You are very near :-) I trust you that you will write a HowTo about dynamic generation of TAL code, once you solved your problem ;-) Dieter