> I just want to make sure I understand exactly what
> you want before I describe a solution
Rick, thanks for your reply - i already have a
solution working together with displaytag as i pointed
out - however i asked if there is a proper way to do
it which differs from mine.
I want not to only display data as pointed out, but be
able to manipulate all data which is currently
displayed to the user - i.e. save, update, delete
similar to the FAQ example but for every entry not
only for one.
My example approach which works is the following, i
store the currently displayed entries into a session
var - after submit i iterate through all entries in
the session var and do a lookup for every input field
using the systax
request.getParameter("somefield_"+someObj.id) - this
way i can retrieve all input fields, i need to do it
this way because i do not know which entries the
display tag library currently renders to the user
(because of pagination and sorting).
Furthermore i try to parse the pagination url params
from the request to include the url params in my
custom links or for saving the current page :
<%@ taglib uri="http://displaytag.sf.net";
prefix="display" %>
<%@ taglib uri="http://java.sun.com/jstl/core_rt";
prefix="c" %>
<%
// list of which entires are currently displayed to
the user BEFORE submit
// needed for save to figure out which entries should
be changed, session var is changed within the
display:column tag
ArrayList entryListDisplayed =
(ArrayList)session.getAttribute("entryListDisplayed");
// remember the current sorting if we save a table or
use javascript
// retrieves current url parameters i.e.
p=21232=1&s=3232
String orderParams =
getDisplayTagOrderParams(request);
String doAction = request.getParameter("doAction");
// example save method will update all currently
displayed user names
if (doAction.equalsIgnoreCase("save")) {
if(entryListDisplayed !=null) {
for(int i=0; i < entryListDisplayed.size();
i++) {
User currentUser =
(User)entryListDisplayed.get(i);
String name = request.getParameter("name_"
+ currentUser.getId());
currentUser.setName(name);
myDatabaseBean().updateUser(currentUser);
}
}
}
}
%>
<html>
<form action='users.jsp<%=orderParams%>'
method='POST'>
<%
Users[] userList = myDatabaseBean().getUsers();
request.setAttribute("entryList",
Arrays.asList(userList) );
// reset entries
entryListDisplayed = new ArrayList();
%>
<display:table id="user" name="entryList"
defaultsort="1" defaultorder="ascending"
pagesize="10">
<display:column title="User Name">
<%
// memorize entires which are currently shown
entryListDisplayed.add(user);
session.setAttribute("entryListDisplayed",
entryListDisplayed);
%>
<input type=input name="name_${user.id}"
value="${user.name}">
</display:column>
</display:table>
<input type="submit" value="Save">
</form>
</html>
--- Rick Herrick <[EMAIL PROTECTED]> wrote:
> Again, displaytag is a tag library for displaying
> things. You're asking for
> a very open-ended form management tool. That isn't
> what displaytag is. It
> does the job for which it's designed very well. It
> shouldn't be surprising
> that you find that a hammer is not so good for
> screwing in bolts.
>
> You'll notice that there are NO functions whatsoever
> in displaytag to handle
> processing posted form data. That's quite
> deliberate. That doesn't mean
> that it can't be a part of your solution though.
> Just don't ask it to do
> something it's not meant to do.
>
> That said, I think you can quite easily use
> displaytag to generate the form
> that you want. Can you please describe what you
> would like to do? If you
> can create some HTML that shows an example of the
> type of form you'd like to
> show to your users would be good also. If I
> understand what you want to do,
> I think I've implemented a number of solutions that
> do almost exactly what
> you want. I just want to make sure I understand
> exactly what you want
> before I describe a solution, as in the past I've
> solved an entirely
> different problem from what people were asking for
> :)
>
> Rick Herrick
> [EMAIL PROTECTED]
>
>
> > -----Original Message-----
> > From:
> [EMAIL PROTECTED]
> [mailto:displaytag-
> > [EMAIL PROTECTED] On Behalf Of
> Harakiri
> > Sent: Monday, May 29, 2006 6:23 AM
> > To: [email protected]
> > Subject: [displaytag-user] Editing / Saving ALL
> current displayed
> > entriespossible - but bad design
> >
> > Hi list,
> >
> > the demo of editing and saving entries using
> display
> > tag
> >
> http://demo.appfuse.org/appfuse/demos/users-edit.jsp
> > has the obvious limitation of only allowing ONE
> entry
> > to be manipulated at each request (save)
> >
> > Ive found a simple way to edit all entries current
> > displayed however - the design is bad i think and
> if
> > displaytag would offer more manipulation abilities
> it
> > would not be needed.
> >
> > Problem 1.
> >
> > I needed to know WHICH entries the user currently
> > edits / views - displaytag does not tell me that
> on a
> > submit of a formular. If i knew which entries are
> > currently displayed i can manipulate this data
> i.e. by
> >
> >
> > ArrayList entryListDisplayed =
> >
>
(ArrayList)session.getAttribute("entryListDisplayed");
> >
> > // entryListDisplayed - the list of entries which
> > // are currently being edited / viewed by the user
> > for(int i=0; i < entryListDisplayed.size(); i++) {
> >
> > User currentUser =
> (User)entryListDisplayed.get(i);
> >
>
currentUser.setSomeField(request.getParameter("SOMEFIELD_"
> > + currentUser.getId()));
> >
> > }
> >
> > Request for Displaytag :
> >
> > Displaytag could put the currently viewed members
> of
> > the list into a seperate list and that list into
> the
> > session. i.e.
> >
> > <display:table id="user" name="entryList"
> > currentlyDisplayed="entryListDisplayed">
> >
> > My Solution :
> >
> > As long as display tag does not supply such data
> > manipulation - i have to use something like this :
> > <%
> > ArrayList entryListDisplayed = new ArrayList();
> >
> > %>
> > <display:table id="user" name="entryList">
> > <% User currentUser =
> > (User)pageContext.getAttribute("user"); %>
> >
> > <display:column property="name">
> > <%
> > // memorize entires which are currently shown
> -
> > needed for save - can be in any column but must be
> > within <column>
> > entryListDisplayed.add(currentUser);
> > session.setAttribute("entryListDisplayed",
> > entryListDisplayed);
> > %>
> > </display:column>
> > </display:table>
> >
> > I figured out that any code within a
> display:column
> > tag is only executed for entries which are
> currently
> > rendered i.e. displayed to the user - so now i do
> know
> > which entries the user currently sees.
> >
> > Problem 2.
> >
> > With the possibility of editing all currently
> > displayed data on a given page - you should (need)
> to
> > remember on which page you currently are and which
> > sorting you currently use. I.e. the user changes
> some
> > entries on page 4 - after submit he would be on
> page 1
> > again not on page 4. So not only the currently
> > displayed data needs to be hold into a session but
> > also the currently used view parameters (page
> number,
> > sorting etc)
> >
> > Request for Displaytag :
> >
> > Either supply a build in function for my own save
> /
> > edit links which adds the current pagination url
> > parameters to my link or store the current sorting
> > into a session var i.e.
> >
> > <display:column title="Delete User">
> > <a
> >
>
href="mypage.jsp?action=deleteUser=&id=${user.id}<display:getProperty
> > name=currentPaginationURL>" >Delete</a>
> > </display:column>
> >
> > My Solution :
> >
> > within the list i found somebody else with the
> same
> > problem he wrote a method which extracts the
> current
> > pSOMEVALUE=1 parameters - i modified it a bit to
> > include all parameters and use it now :
> >
> > // find the internal url request params from the
> > display tag libary
> > public String
> > getDisplayTagOrderParams(HttpServletRequest
> myRequest)
> > {
> >
> > if(myRequest == null ||
> myRequest.getParameterMap()
> > == null)
> > return "";
> >
> > java.util.Map pm = myRequest.getParameterMap();
> > String page_par = null;
> > String sort_par = null;
> > String order_par = null;
> >
> >
> > for( int i=0; i<pm.size(); i++){
> > java.util.Iterator it = pm.keySet().iterator();
> >
> > while(it.hasNext()){
> > String next=it.next().toString();
>
=== message truncated ===
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