Problem with page cache clearing

Question

I have a button that exits HTML DB and returns to our portal main page. That is done through a URL, and not a page number. There is no way to reset page cache with a URL branch. So I made a page that has a branch that calls the URL, and then I changed the button on the page to branch to this page and do the proper page cache resets before calling the other page that branches to the URL. However, the page cache is not being reset when I do this.
Here is the page flow
page 10 - Select a record for update
page 20 - Display data using an ID that is on page 10
If Return to Menu is clicked branch to page 1 and reset page 10 and page 20
Page 1 - Branches to URL
When I go back to page 10 from the application server page page 10 & 20 are still populated.
If I change page 20's return to menu to branch to page 10, then the reset does occur. What am I doing wrong? How do I reset the pages when leaving HTML DB?

Answer 1

Dwayne,
Validations, like other components, can have conditions that observe the current request value. This value is set to the button name when a button submits the page. So you could have a condition on a validation like 'When request != Expression 1' and in the Expression 1 field type the button name (check the button attributes to confirm the case-sensitive name and submit the page in debug mode to see the value of request when you click the button).
About clearing page cache when branching to URL -- not sure what you're after: Cache can be cleared if an HTML DB page is invoked via URL. You specify clear-cache options in the branch definition which you can observe in the URL that invokes the target page. If you mean that you want the cache of one or more HTML DB pages to be cleared "when" a branch to a non-HTML DB page is taken, that doesn't really make sense because nothing much happens during a branch except to call the HTML DB engine's accept procedure or to do a URL redirect. So all you can do is specify some action to happen "before" a branch is taken, e.g., clear cache on pages x,y,z using a page process, or specify that the clear cache action is to occur "after" the branch is taken as manifested in the resulting URL to an HTML DB page. For something to happen "when" a branch is being done presumably would be after page processing but before a redirect, which we already support in the form of page processes.
Scott