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From "David Corbin" <dcor...@imperitek.com>
Subject Re: Dynamic forwardings...
Date Mon, 27 Aug 2001 10:22:35 GMT
I understand the first choice presented below.  But I don't understand the
second choice.  I think I fail to fully understand ActionForm.  Are you
saying that if I have a populated ActionForm, then all of those arguments
get "passed on" when I forward to another action?

----- Original Message -----
From: "Ted Husted" <husted@apache.org>
To: <struts-user@jakarta.apache.org>
Sent: Sunday, August 26, 2001 9:11 PM
Subject: Re: Dynamic forwardings...


> You can construct ActionForwards from scratch, and I have seen people
> include query strings with that.
>
> http://www.mail-archive.com/struts-user@jakarta.apache.org/msg14224.html
>
> Personally, I would think about adding these parameters as hidden fields
> to the ActionForm, use the form instead, and forget about the
> parameters. Struts automatically populates the ActionForm from the
> parameters.
>
> It would also populate the same or different ActionForm for the second
> ActionMapping if you forwarded the request.
>
> David Corbin wrote:
> >
> > I'm not sure where I'm miscommunication, so I'll go back to the
beginning.
> >
> > I have an action "list".  It expects an parameter "tableID", so a link
to it
> > looks like "http://host/app/list.do?tableID=foo", and if things are
> > successful, returns a page with a list of items that depend on the
tableID.
> > For each item, there is a link generated for action "blue" that
specifies
> > two parameters: tableID & itemID
> > (http://host/app/blue.do?tableID=foo&itemID=xyzzy).
> >
> > No problem.
> >
> > The action "blue" requires the two parameters "tableID" and "itemID".
Under
> > certain circumstances, the results of the action blue require that
> > "list.do?tableID=foo" be "forwarded".  Struts doesn't seem to provide a
way
> > to handle this last case.  If it does, I don't understand it.
> >
> > David
> > ----- Original Message -----
> > From: "Ted Husted" <husted@apache.org>
> > To: <struts-user@jakarta.apache.org>
> > Sent: Sunday, August 26, 2001 7:14 PM
> > Subject: Re: Dynamic forwardings...
> >
> > > Typically, there would be a finite number of inputs, and you could
have
> > > a logical forward for each one.
> > >
> > > The ActionMappings form an API for the legal entry points to the
> > > application.
> > >
> > > Usually, the only thing that is truly dynamic is a reference into a
data
> > > source, to look something up. In that case, the link tag can take one
or
> > > more dynamic parameters, based on the collection of beans used to
write
> > > it.
> > >
> > > In that case, the action usually gets the parameters from the request,
> > > and uses them to look up whatever is required.
> > >
> > > David Corbin wrote:
> > > >
> > > > I'm definately talking about "forward", but my "whatever" value is
> > dynamic.
> > > > It's based on input (a parameter) into the action.  I don't yet
> > understand
> > > > the best solution for that.
> > > >
> > > > ----- Original Message -----
> > > > From: "Ted Husted" <husted@apache.org>
> > > > To: <struts-user@jakarta.apache.org>
> > > > Sent: Sunday, August 26, 2001 2:56 PM
> > > > Subject: Re: Dynamic forwardings...
> > > >
> > > > > For a forward, you just put in an encoded query string for the
path:
> > > > >
> > > > >      <forward name="itemAdd"
> > > > >           path="/do/item/Add?code=whatever"/>
> > > > >
> > > > > For an action mapping, you can use the parameter property
> > > > >
> > > > >             <action
> > > > >                 path="/do/item/Add"
> > > > > ...
> > > > >                 parameter="add">
> > > > >             </action>
> > > > >
> > > > > and have the action check for the code there
> > > > >
> > > > > String code = mapping.getParameter();
> > > > >
> > > > >
> > > > > David Corbin wrote:
> > > > > >
> > > > > > I've got a an action "add", which requires a an argument "code".
> > > > > > One (at least) of the possible forwards needs to specify this
"code"
> > on
> > > > the
> > > > > > forward URL.
> > > > > >
> > > > > > How can I do that?
> > > > > >
> > > > > > Thanks
> > > > > > David Corbin
>
>


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