> -----Original Message-----
> From: Hoang, Hai [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, September 19, 2002 10:44 AM
> To: 'struts-user'
> Subject: [AGAIN] Duplicate values on both ActionForm error.
>
>
> I've a master-detail page setup where the master page
> contains a number of
> items with hyperlink to the detail page. The problem occurred when I
> updating on the detail page and submit the update back to the
> database and
> forward the request back to the master page. Specifically,
> the property
> value (called it actionName = "update") on the ActionForm of
> the detail page
> forwards it value to the ActionForm of the master page. Do
> you know why
> this happens? Thanks.
This is just the way it works. If you forward a request using the
RequestDispatcher (which is what you are doing - or rather, what Struts is
doing at your request), all of the original request parameters are still
present, because it's actually still the same request.
If your first action forwards to a URL that has additional parameters in it,
those parameters will be added to those in the original request, so the
combination of all of them will be seen by the second action.
The only way to avoid having the original parameters be passed on to the
second action is to use a redirect instead of a forward. The main problem
with that is that it costs you a round-trip back through the browser.
This is just one of the reasons that action chaining is not recommended in
Struts applications. There are many more - just as Craig. ;-)
--
Martin Cooper
>
>
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