Is it possible to return dtml from python, and have it rendered correctly on the page? for example, the python might look like this... def get_header(somevar=1): if somevar==1: return '<dtml-var standard_html_header>' else: return '<dtml-var other_html_header>' The dtml document in the zodb might look like this... <dtml-var expr="get_header(1)"> Body text.... <dtml-var standard_html_footer> When this gets rendered, it's as if the dtml document had <dtml-var standard_html_header> in place of the get_header call. I understand how to call external methods from dtml, etc. I just want to know if it's possible to get the string returned rendered as dtml. Mark --------------- Mark Gibson Kaivo, Inc. www.kaivo.com
"Mark N. Gibson" wrote:
Is it possible to return dtml from python, and have it rendered correctly on the page?
for example, the python might look like this...
def get_header(somevar=1): if somevar==1: return '<dtml-var standard_html_header>' else: return '<dtml-var other_html_header>'
The dtml document in the zodb might look like this...
<dtml-var expr="get_header(1)"> Body text.... <dtml-var standard_html_footer>
When this gets rendered, it's as if the dtml document had <dtml-var standard_html_header> in place of the get_header call.
to have your example work would require multiple or nested passes of the dtml-evalutation machinery. so no you can't return a string containing dtml and expect it to be evalutated. the machinery expects you to return a string or value (for dtml-var) to which it will apply formatting rules. on the web the evalutation machinery automatically calls (possibly nested) dtml tags, so this is not a concern, but again it only performs the evaluation once. if you want to achieve this result from python you can evaluate/call the standard_html_header in python and return the resultant string. see the arguements for DTMLMethod in the /lib/python/OFS folder for exact syntax. doing it from a dtml method would be easier assuming it fits the usage. <dtml-call "REQUEST.set('somevar', getvaluefromsomewhere()"> <dtml-if "somevar==1"> <dtml-var standard_html_header> <dtml-else> <dtml-var other_html_header> </dtml-if> Cheers Kapil
I understand how to call external methods from dtml, etc. I just want to know if it's possible to get the string returned rendered as dtml.
Mark
--------------- Mark Gibson Kaivo, Inc. www.kaivo.com
_______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Kapil Thangavelu wrote:
"Mark N. Gibson" wrote:
Is it possible to return dtml from python, and have it rendered correctly on the page?
for example, the python might look like this...
def get_header(somevar=1): if somevar==1: return '<dtml-var standard_html_header>' else: return '<dtml-var other_html_header>'
The dtml document in the zodb might look like this...
<dtml-var expr="get_header(1)"> Body text.... <dtml-var standard_html_footer>
When this gets rendered, it's as if the dtml document had <dtml-var standard_html_header> in place of the get_header call.
if you want to achieve this result from python you can evaluate/call the standard_html_header in python and return the resultant string. see the arguements for DTMLMethod in the /lib/python/OFS folder for exact syntax.
to clarify on the python solutions, the options that i see are either 1. calling the dtml method. if you have a reference to the method than you call it directly. something like return standard_html_header() refer to lib/python/OFS/DTMLMethod.py for calling syntax & args 2. evalutate an arbitrary dtml string ala '<dtml-var standard_html_header>', something like return HTML('<dtml-var standard_html_header>')() refer to lib/python/OFS/DocumentTemplate/ for exact syntax && args.
Thanks too all who replied, I may have simplified my problem a little too much before posting it. The heart of it is that I'd like to have the Zope evaluate an arbitrary string as if it were a DTMLMethod For those interested, here is what I ended up doing... -------------------------------------- pyfile.py from OFS.DTMLMethod import DTMLMethod class myclass: """ a callable object: This is acting as a base class for a ZClass """ def __call__(self,REQUEST): """ a callable object - I pass in REQUEST because my dtml-vary seems to require it """ # create your dtml string - note: the idea is, this doesn't have to be a static string... text= '<dtml-vary lang="en,en-US,en-BR">\ <H1>ENGLIS TITLE</H1>\ THIS IS ENGLISH CONTENT\ <dtml-vary lang="fr,fr-CA,fr-FR">\ THSI IS FRENCH CONTENT\ <dtml-vary lang="es">\ <H1>Spanish title</H1>\ This is spanish text\ </dtml-vary>' met h=DTMLMethod() # populate the DTMLMethod meth.manage_edit( text,'THIS IS THE TITLE') #the DTMLMethod goes out of scope here, so it's never persistent ( I hope ). return meth(REQUEST) -------------------------- I call this from from zope as follows... ------------------------- <dtml-var standard_html_header> <h2><dtml-var title_or_id></h2> <p> <dtml-comment> m1 is an instance of a ZClass that has myclass as a base class. <dtml-comment> <dtml-comment> this calls myclass.__call__(self,REQUEST) <dtml-comment> <dtml-var expr="m1(REQUEST)"> </p> <dtml-var standard_html_footer> ------------------------- This solution worked for me. It would still be nice if I didn't have to pass REQUEST explicitly. I could have derived myclass (or the ZClass) from DTMLMethod, but I didn't need the DTMLMethod itself to be persistent. Also, I'm not sure how to intercept __call__ and pas it on to the DTMLMethod. It's a little ugly, but it works. It would be nice to be able to just say <dtml-var myclassObjectName> in zope and have it render. Mark Kapil Thangavelu wrote:
"Mark N. Gibson" wrote:
Is it possible to return dtml from python, and have it rendered correctly on the page?
for example, the python might look like this...
def get_header(somevar=1): if somevar==1: return '<dtml-var standard_html_header>' else: return '<dtml-var other_html_header>'
The dtml document in the zodb might look like this...
<dtml-var expr="get_header(1)"> Body text.... <dtml-var standard_html_footer>
When this gets rendered, it's as if the dtml document had <dtml-var standard_html_header> in place of the get_header call.
to have your example work would require multiple or nested passes of the dtml-evalutation machinery. so no you can't return a string containing dtml and expect it to be evalutated. the machinery expects you to return a string or value (for dtml-var) to which it will apply formatting rules.
on the web the evalutation machinery automatically calls (possibly nested) dtml tags, so this is not a concern, but again it only performs the evaluation once.
if you want to achieve this result from python you can evaluate/call the standard_html_header in python and return the resultant string. see the arguements for DTMLMethod in the /lib/python/OFS folder for exact syntax.
doing it from a dtml method would be easier assuming it fits the usage. <dtml-call "REQUEST.set('somevar', getvaluefromsomewhere()"> <dtml-if "somevar==1"> <dtml-var standard_html_header> <dtml-else> <dtml-var other_html_header> </dtml-if>
Cheers
Kapil
I understand how to call external methods from dtml, etc. I just want to know if it's possible to get the string returned rendered as dtml.
Mark
--------------- Mark Gibson Kaivo, Inc. www.kaivo.com
_______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
_______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
participants (2)
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Kapil Thangavelu -
Mark N. Gibson