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Posted to users@tapestry.apache.org by Jun Tsai <ju...@gmail.com> on 2005/09/12 11:10:12 UTC
How to avoid rewind a list?
hi ,all
I have a form includes a checkbox group component.I find If I submit the
form,it will call my getListData method again.How to avoid this?I want to
get the checkbox value(primary key value) only!
Thanks.
Jun Tsai
--
Welcome to China Java Users Group(CNJUG).
http://cnjug.dev.java.net
RE: How to avoid rewind a list?
Posted by Patrick Casey <pa...@adelphia.net>.
Perhaps if you moved your database code from getListData() to
PageBeginRender and went with:
public void pageBeginRender(PageEvent event) {
if (event.getRequestCycle().isRewinding())
return;
setupListData();
}
?
> -----Original Message-----
> From: Jun Tsai [mailto:jun.tsai@gmail.com]
> Sent: Monday, September 12, 2005 6:18 PM
> To: Tapestry users
> Subject: Re: How to avoid rewind a list?
>
> Thank your reply.But when I submit my form ,It will fire my getListData
> method which fetch data from database.
>
> ps:cycle.getRequestContext().getRequest()
> .getParameterNames();
> It will be deprecated in TP4.
>
> On 9/13/05, Patrick Casey <pa...@adelphia.net> wrote:
> >
> >
> > Something like this might work for you.
> >
> > --- Pat
> > Public void doDeletes(IRequestCycle cycle) {
> > Enumeration en = cycle.getRequestContext().getRequest()
> > .getParameterNames();
> > ArrayList keys = new ArrayList();
> > while (en.hasMoreElements()) {
> > String s = (String) en.nextElement();
> > String value =
> > cycle.getRequestContext().getParameter(s);
> >
> > if (s.startsWith(FastGrid.POST_HEADER)) {
> > String id =
> > s.substring(FastGrid.POST_HEADER.length());
> > if (value.equals("on"))
> > keys.add(id);
> > }
> > }
> > if (keys.size() > 0) {
> > HibHelper.beginTransaction();
> > Criteria c =
> > HibHelper.getSession().createCriteria(fObjectClass);
> > c.add(Expression.in("id", keys));
> > List l = c.list();
> > for (int x = 0; x < l.size(); x++) {
> > HibHelper.getSession().delete(l.get(x));
> > }
> > HibHelper.commitTransaction();
> > fMessage = "Successfully deleted " + l.size() + "
> > records.";
> > }
> >
> > > -----Original Message-----
> > > From: news [mailto:news@sea.gmane.org] On Behalf Of Ron Piterman
> > > Sent: Monday, September 12, 2005 4:30 AM
> > > To: tapestry-user@jakarta.apache.org
> > > Subject: Re: How to avoid rewind a list?
> > >
> > > Forms in Tapestry always rewind. If you don't want to get the list
> from
> > > the database again, you can "persist" it in the session.
> > >
> > > ציטוט Jun Tsai:
> > > > hi ,all
> > > > I have a form includes a checkbox group component.I find If I submit
> > the
> > > > form,it will call my getListData method again.How to avoid this?I
> want
> > > to
> > > > get the checkbox value(primary key value) only!
> > > > Thanks.
> > > > Jun Tsai
> > > >
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> >
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> >
> >
>
>
> --
> Welcome to China Java Users Group(CNJUG).
> http://cnjug.dev.java.net
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Re: How to avoid rewind a list?
Posted by Jun Tsai <ju...@gmail.com>.
Thank your reply.But when I submit my form ,It will fire my getListData
method which fetch data from database.
ps:cycle.getRequestContext().getRequest()
.getParameterNames();
It will be deprecated in TP4.
On 9/13/05, Patrick Casey <pa...@adelphia.net> wrote:
>
>
> Something like this might work for you.
>
> --- Pat
> Public void doDeletes(IRequestCycle cycle) {
> Enumeration en = cycle.getRequestContext().getRequest()
> .getParameterNames();
> ArrayList keys = new ArrayList();
> while (en.hasMoreElements()) {
> String s = (String) en.nextElement();
> String value =
> cycle.getRequestContext().getParameter(s);
>
> if (s.startsWith(FastGrid.POST_HEADER)) {
> String id =
> s.substring(FastGrid.POST_HEADER.length());
> if (value.equals("on"))
> keys.add(id);
> }
> }
> if (keys.size() > 0) {
> HibHelper.beginTransaction();
> Criteria c =
> HibHelper.getSession().createCriteria(fObjectClass);
> c.add(Expression.in("id", keys));
> List l = c.list();
> for (int x = 0; x < l.size(); x++) {
> HibHelper.getSession().delete(l.get(x));
> }
> HibHelper.commitTransaction();
> fMessage = "Successfully deleted " + l.size() + "
> records.";
> }
>
> > -----Original Message-----
> > From: news [mailto:news@sea.gmane.org] On Behalf Of Ron Piterman
> > Sent: Monday, September 12, 2005 4:30 AM
> > To: tapestry-user@jakarta.apache.org
> > Subject: Re: How to avoid rewind a list?
> >
> > Forms in Tapestry always rewind. If you don't want to get the list from
> > the database again, you can "persist" it in the session.
> >
> > ציטוט Jun Tsai:
> > > hi ,all
> > > I have a form includes a checkbox group component.I find If I submit
> the
> > > form,it will call my getListData method again.How to avoid this?I want
> > to
> > > get the checkbox value(primary key value) only!
> > > Thanks.
> > > Jun Tsai
> > >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
--
Welcome to China Java Users Group(CNJUG).
http://cnjug.dev.java.net
RE: How to avoid rewind a list?
Posted by Patrick Casey <pa...@adelphia.net>.
Something like this might work for you.
--- Pat
Public void doDeletes(IRequestCycle cycle) {
Enumeration en = cycle.getRequestContext().getRequest()
.getParameterNames();
ArrayList keys = new ArrayList();
while (en.hasMoreElements()) {
String s = (String) en.nextElement();
String value =
cycle.getRequestContext().getParameter(s);
if (s.startsWith(FastGrid.POST_HEADER)) {
String id =
s.substring(FastGrid.POST_HEADER.length());
if (value.equals("on"))
keys.add(id);
}
}
if (keys.size() > 0) {
HibHelper.beginTransaction();
Criteria c =
HibHelper.getSession().createCriteria(fObjectClass);
c.add(Expression.in("id", keys));
List l = c.list();
for (int x = 0; x < l.size(); x++) {
HibHelper.getSession().delete(l.get(x));
}
HibHelper.commitTransaction();
fMessage = "Successfully deleted " + l.size() + "
records.";
}
> -----Original Message-----
> From: news [mailto:news@sea.gmane.org] On Behalf Of Ron Piterman
> Sent: Monday, September 12, 2005 4:30 AM
> To: tapestry-user@jakarta.apache.org
> Subject: Re: How to avoid rewind a list?
>
> Forms in Tapestry always rewind. If you don't want to get the list from
> the database again, you can "persist" it in the session.
>
> ציטוט Jun Tsai:
> > hi ,all
> > I have a form includes a checkbox group component.I find If I submit the
> > form,it will call my getListData method again.How to avoid this?I want
> to
> > get the checkbox value(primary key value) only!
> > Thanks.
> > Jun Tsai
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
Re: How to avoid rewind a list?
Posted by Ron Piterman <rp...@gmx.net>.
Forms in Tapestry always rewind. If you don't want to get the list from
the database again, you can "persist" it in the session.
ציטוט Jun Tsai:
> hi ,all
> I have a form includes a checkbox group component.I find If I submit the
> form,it will call my getListData method again.How to avoid this?I want to
> get the checkbox value(primary key value) only!
> Thanks.
> Jun Tsai
>
---------------------------------------------------------------------
To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
Re: How to avoid rewind a list?
Posted by Paul Cantrell <ca...@pobox.com>.
If you implement it using the For component, you can set
volatile=true. (This is risky business, though.)
Cheers,
Paul
On Sep 12, 2005, at 4:10 AM, Jun Tsai wrote:
> hi ,all
> I have a form includes a checkbox group component.I find If I
> submit the
> form,it will call my getListData method again.How to avoid this?I
> want to
> get the checkbox value(primary key value) only!
> Thanks.
> Jun Tsai
>
> --
> Welcome to China Java Users Group(CNJUG).
> http://cnjug.dev.java.net
>
---------------------------------------------------------------------
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For additional commands, e-mail: tapestry-user-help@jakarta.apache.org