there is a lot of confusion about workflow control in controllers, in ML
and in the TG book is not well clarified how is the correct procedure,
and infact i've a lot of doubt about different use of:
return self.page( tg_errors, data )
and
raise tg.redirect( tg.url("page", tg_errors=tg_errors, **data) )
In a controller we must do frequently something like:
@tg.expose()
@tg.validate( form = previous_page )
def page(self, tg_errors=None, **data):
if tg_errors:
pass # some error handling
if not data.get('my_submit_button_pressed'):
# this is the case of autosubmit widget
return self.previous_page( tg_errors, **data )
raise tg.redirect( tg.url("previous_page",
tg_errors=tg_errors, **data) )
else:
# proceed with workflow
pass
This is the main structure of our workflow-controller-process.
Now ..some consideration !
------------------------------------------------------------------------
return self.previous_page( tg_errors, **data )
Data is well passed to previous_page, validated and correclty converted
(single , nested_widget, repeating widget, shuttle select, fieldset, etc..).
But this have a strange behaviour, if the form is used in KID with
"${form(**form_params)}" the form_params contain always the original
value submitted, so a command like:
data['value']['mywidget'] = 'foo'
is absolutlely ignored !
i found that something like this:
<B>${form_params['value']['mywidget']}</B>
render different value from
${form(**form_params)}
where Kid get original value, is a mistery for me....
------------------------------------------------------------------------
raise tg.redirect( tg.url("previous_page", tg_errors=tg_errors, **data) )
This is the tecnique described in the docuementation, but this have
other problem:
First of all, a big form create an impressive and too long URL !
Second the url_quote procedure convert correclty ONLY first level of
data, if your form is a complicated tree of data (nested widget like
fieldset or select_shuttle) all value under the first level are all
converted in unicode !
only solution i found is a non good pythonic solution !
if isinstance ( data.get('mywidgetvalue'), unicode):
data['mywidgetvalue'] = eval(data['mywidgetvalue']) # FIXME:
TERRIBLE !
does anyone clear idea about this issue ?
glauco
--
+------------------------------------------------------------+
Glauco Uri - Programmatore
glauco(at)allevatori.com
Sfera Carta Software(r) [EMAIL PROTECTED]
Via Bazzanese,69 Casalecchio di Reno(BO) - Tel. 051591054
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