CachingURICoplet and Flowscript / CForms

[Jon Evans]

Hi everyone,

I'm still having problems implementing a cforms-based coplet in 
flowscript, and I think maybe in previous messages to this list I've 
not been very clear as to what my problem is, so I'm going to try 
again. :-)

Lets say I have a form that lets the user update their details.  
Pseudo-flow-code would be:

function show(form) {
  populate(form);
  form.showForm("display-pipeline");
  saveToDB(form);
  cocoon.sendPage("success-pipeline");
}
So the coplet starts off by displaying an "update your details" form, 
then when you click submit it says "updates saved" or something.

In order for it to work properly with the portal engine, it is a 
CachingURICoplet.  This means that if you switch away to a different 
tab in the site, then back again, the coplet will load from the cache.  
This is normally what you want, except after you've displayed the final 
page ("Your updates have been saved to the database") you actually want 
it to reset itself, so that the next time the portal needs to render 
the coplet it regenerates itself from scratch.  Otherwise you update 
your details once, and after that you always get the "success" page.

I can fudge it by changing the flowscript to a while(true){} loop, and 
rendering the success page with sendPageAndWait, and putting a "Make 
another change" button on the success page.  But that user interface 
needs taking out and shooting. :-)  What I want to be able to do is:

function show(form) {
  populate(form);
  form.showForm("display-pipeline");
  saveToDB(form);
  cocoon.sendPage("success-pipeline");
  reset();
}
function reset() {
  // this is pseudo code remember!
  thisCoplet.reset();
  thisCoplet.clearCache();
  // Now the next time this coplet is displayed,
  // it will be generated from scratch as if it
  // had never been displayed before
}
Also, I'm still looking for a code snippet that would let me do this 
from my flowscript:

var myValue = thisCoplet.get("attributes/myValue");
// where myValue is defined in my copletdata/portal.xml file
Thanks,

Jon

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