You only need to reset the bean values if the bean values change in
some way beyond the normal flow of the program. Ie, if you click on
a button, and suddenly a row is gone, then you need to reset your
cached/saveState'd backing list.
If you have a specific example, I can offer you some specific advice.
On 9/18/06, David Delbecq <[EMAIL PROTECTED]> wrote:
Ok, In this case that can be applied because this action is the only one
involved in that specific form. But what about more complex form, where
there is such a table but lots of possible actions, if i need to always
reset the bean value between the decode and the encode operations?
Mike Kienenberger a écrit :
> Yes to both of you. All you need to do is update your backing data
> model in the action -- pretty convenient :-)
>
> Ie, if you have something like
>
> <h:dataTable value="#{sharkEngine.acceptedAssignments}"
> <h:commandLink action="#{sharkEngine.action.showActivity}"
>
> then in #{sharkEngine.action.showActivity} you change the value of
> sharkEngine.acceptedAssignments to be the updated list.
>
>
> On 9/16/06, delbd <[EMAIL PROTECTED]> wrote:
>> So then my problem is how to have the datatable contains old datas
>> before action and new datas after action...
>
> On 9/16/06, Mr Arvind Pandey <[EMAIL PROTECTED]> wrote:
>> u r right. u can use preserveDataModel="true" in
>> datatable. if it is true then action method surely be
>> invoked. But the problem is if u want to delete the
>> row from table and afetr deletion you want to display
>> the same page then row will be deleted from DB but
>> page will contain that row. I am looking for the soln.
>
>> Mike Kienenberger a écrit :
>> > h:dataTable value="#{sharkEngine.acceptedAssignments}" must remain
>> > constant from renderResponse of the first request through
>> > invokeAction of the second request.
>> >
>> > I handle this by using <t:saveState
>> > value="#{sharkEngine.acceptedAssignments}">
>> >
>> >
>> >
>> > On 9/15/06, David Delbecq <[EMAIL PROTECTED]> wrote:
>> >> Hello,
>> >>
>> >> I have a datatable that iterate over some database values. Those
>> values
>> >> are subject to change, especially in quantity. The datatable is
>> rendered
>> >> like this:
>> >> <h:dataTable value="#{sharkEngine.acceptedAssignments}"
>> >> var="theAssignment">
>> >> <h:column>
>> >> <h:commandLink immediate="true"
>> >> value="#{theAssignment.activity.name}"
>> >> action="#{sharkEngine.action.showActivity}"
>> >> actionListener="#{sharkEngine.action.commandListener}">
>> >> <f:param name="activityToShow"
>> >> value="#{theAssignment.activity.key}" />
>> >> </h:commandLink>
>> >> </h:column>
>> >> </h:dataTable>
>> >>
>> >> This basically renders a list of links that need to contain one
>> >> information: "activityToShow". Technically,
>> >> #{sharkEngine.action.showActivity} will need nothing more to setup
>> >> session and show the edition form. However, between display of
>> table and
>> >> click by user, the database list referenced by datatable is
>> subject to
>> >> change (because whatever happens, we must reflect db changes to
>> user).
>> >>
>> >> Here is the problem:
>> >> If 3 items are showned to user (let's say a,b,c), the user clicks
>> on the
>> >> last one (c) but by that time the entry a has been removed from
>> >> database, the action does not take place?!?
>> >> I suspect this is because the 3rd line of datatable has been
>> removed,
>> >> but how do i handle this. The user won't accept that nothing happens
>> >> while he clicks on an entry, obviously. JSF is silent on why it
>> did not
>> >> execute the action and <h:messages/> shows nothing too.
>> >>
>> >> What is the good way to create such list of links?
>> >>
>>
>>
