ListView + dynamic database Model
Sorry for my poor english ;)
I have ListView and model like below. I need tabs to reload sometimes,
so my model is dynamic and get tabs from database.
But i see that something is wrong. When i want to get Tab object by
getModelObject() in populateItem method i suppoused that i got it
directly, but i see that all the times the getObject() method of model
is triggered making for all items new list (new db request) !
How to get Tab objects for items without making wasting time database
request ???
IModel model = new IModel() {
public Object getObject() {
System.out.println(getObject...);
...
// getting list from DB
ListTab list = ;
return list;
}
public void setObject(Object object) {}
public void detach() {
}};
ListView tabs = new ListView(tabs, model) {
@Override
protected void populateItem(ListItem item) {
item.getModelObject(); /* - new
list, and new list,
and new list.. :(
}
};
--
Greetings,
marioosh
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: ListView + dynamic database Model
On 03/02/10 11:55, marioosh.net wrote:
Sorry for my poor english ;)
I have ListView and model like below. I need tabs to reload sometimes,
so my model is dynamic and get tabs from database.
But i see that something is wrong. When i want to get Tab object by
getModelObject() in populateItem method i suppoused that i got it
directly, but i see that all the times the getObject() method of model
is triggered making for all items new list (new db request) !
That's exactly what is supposed to happen, as getModelObject() is just a
shorthand for getModel().getObject(). And in your getObject(), you do
the database request.
If you need to avoid those database reloads, look into
LoadableDetachableModels.
-- Thomas
How to get Tab objects for items without making wasting time database
request ???
IModel model = new IModel() {
public Object getObject() {
System.out.println(getObject...);
...
// getting list from DB
ListTab list = ;
return list;
}
public void setObject(Object object) {}
public void detach() {
}};
ListView tabs = new ListView(tabs, model) {
@Override
protected void populateItem(ListItem item) {
item.getModelObject(); /*- new
list, and new list,
and new list.. :(
}
};
--
---
Thomas Kapplerthomas.kapp...@isb-sib.ch
Swiss Institute of Bioinformatics Tel: +41 22 379 51 89
CMU, rue Michel Servet 1
1211 Geneve 4
Switzerland http://www.uniprot.org
---
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: ListView + dynamic database Model
Thomas Kappler-3 wrote:
On 03/02/10 11:55, marioosh.net wrote:
Sorry for my poor english ;)
I have ListView and model like below. I need tabs to reload sometimes,
so my model is dynamic and get tabs from database.
But i see that something is wrong. When i want to get Tab object by
getModelObject() in populateItem method i suppoused that i got it
directly, but i see that all the times the getObject() method of model
is triggered making for all items new list (new db request) !
That's exactly what is supposed to happen, as getModelObject() is just a
shorthand for getModel().getObject(). And in your getObject(), you do
the database request.
If you need to avoid those database reloads, look into
LoadableDetachableModels.
-- Thomas
Thank You very much Thomas.
I move code from getObject() method in IModel to load() method in
LoadableDetachableModel and everything works! - no more useless requests to
db :)
LoadableDetachableModel model2 = new LoadableDetachableModel() {
@Override
protected Object load() {
...
// getting list from DB
ListTab list = ;
return list;
}
};
--
View this message in context:
http://old.nabble.com/ListView-%2B-dynamic-database-Model-tp27754495p27754908.html
Sent from the Wicket - User mailing list archive at Nabble.com.
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
