Actually I just realized part of the problem below is/was is that even
using the standard ActionForm I can't seem to get the nested ArrayList
stuff to take upon submission unless I give the form session scope.
I'm sure this question has been answered before so I'll look in the
archives ( although I must admit the searching ability on the archives
for this struts list is not the greatest )
If someone does have comments don't hesitate to send them.
Thanks
Rick
On Wednesday, July 17, 2002, 11:24:10 AM, Rick wrote:
RR> Craig and company,
RR> I'll comment some more below but I want to first explain what needs to
RR> be set up and handled. I have an ArrayList of beans. Each bean in this
RR> ArrayList also contains an ArrayList of String object. On my JSP I'm
RR> using the nested tag (new to using it- bannana stuff very helpful
RR> Arron) to create the dynamically created form. ( Picture a JSP that
RR> was to display a dynamic list of cars and for each car there would be
RR> list of particular styles you could pick from).
RR> On Tuesday, July 16, 2002, 10:45:11 PM, Craig wrote:
CRM>> If you're using request scope beans, a new instance gets created on every
CRM>> request. And I will bet that you probably have an initialization of this
CRM>> array happening in your constructor, or in an initialization expression,
CRM>> right?
RR> Yes, I believe so. A DTO is populated with the ArrayList of beans
RR> and then the DTO is converted to the DynaActionForm which is set
RR> into request scope. (The nested tag and display of the
RR> information on the page is working beautifully..problem is upon
RR> submission).
>>> What if the information in an ArrayList of beans that you want in a
>>> DynaActionForm is to first be populated by some database info.
>>> Do you need to first initialize it like a above to a bunch of
>>> nulls? If so what if the list size fluctuates (hence use of
>>> ArrayList) how do you know how many to initialize the ArrayList
>>> with?
>>>
CRM>> That's definitely a place where loading the arrays in the reset() method
CRM>> makes sense.
RR> Ok, well what I've done is added this to the base class that my
RR> DynaActionForm (actually DynaValidatorForm) extends (Roman on
RR> this list was helping me with this) (20 is just an arbitrary
RR> number greater than the amount that would be displayed on the
RR> form):
RR> public class UserDynaForm extends DynaValidatorForm {
RR> public void reset( ActionMapping mapping, HttpServletRequest request ) {
RR> ArrayList applicationGroups = new ArrayList();
RR> for (int i=0; i < 20; i++) {
RR> ApplicationGroupBean b = new ApplicationGroupBean();
RR> b.setRoles( new ArrayList() );
RR> applicationGroups.add(b);
RR> }
RR> set("applicationGroups", applicationGroups);
RR> }
RR> }
RR> I then still have in my struts-config, for this form:
RR> <form-bean name="userForm"
RR> dynamic="true"
RR> type="corporate.userAdmin.UserDynaForm">:
RR> <form-property name="applicationGroups" type="java.util.ArrayList"/>
RR> ....
RR> The page will display the initial information fine. When I submit now,
RR> however, the problem is it's trying to submit nulls. It's as if it
RR> doesn't pick up what was selected on the JSP and this reset is wiping
RR> out what was selected?
RR> I'm sure I'm missing something simple so sorry for my ignorance. I
RR> guess what is so odd is that when I switch to using a standard
RR> ActionForm I don't have to override the reset and the page submits
RR> fine.
RR> Thanks for the help.
--
Rick
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