The only way to pass a variable created as part of one request, to the following one (after you click 'submit' your browser generates a new one, even though you are calling the same template), is to have it as a form object, maybe as a hidden input tag. You can also perform the same via javascript. Ausum ----- Original Message ----- From: "Philip Kilner" <phil@xfr.co.uk> To: <zope@zope.org> Sent: Wednesday, April 21, 2004 1:57 PM Subject: [Zope] Request & has_key
Hi List,
I'm having problems with testing for the existence of a key in my request. I've had similar problems in the past, and asked the list in the past, but always managed to fumble my way out of them - now I seem to be 100% stuck!
I'm working on a page template which calls a python script. This script needs to: -
- Test for the existence of a counter called "job_step". - If it does not exist, initialise it as one (it's an integer). - If it does exist, perform conditional tasks based on it's value.
My script reads, in part: -
req = context.REQUEST
if req.has_key('job_step'):
if req.job_step == 1: do that...
else: do the other... else: container.REQUEST.set('job_step', 1) do this...
...and that's where my problem lies - the test /always/ fails!
If I throw the whole request into the page template, I can see that the key "job_step" is listed, with a value of one. Subsequently, a second script called by the same template increments it to two, which I can also see, if I comment out the line which sets it to one - but when the whole page is thrown for "step 2", the test fails and the value is reset to one.
So: -
- Can anyone help me understand what I'm doing wrong?
- I've been advised in the past that "REQUEST", although it "acts" like a dictionary is not actually a dictionary. Is this so?
- Is there a way of testing that "req" is a dictionary?
- If it isn't, shouldn't "has_key" barf?
This feels like a basic, stupid, question, but I'm stuck and - apart from reminding me that I've been here before, Google is apparently /not/ my friend today...
TIA
Cheers,
PhilK
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