// It solves your problem because the call to load will be made each
time your view renders
final LoadableDetachableModel articlesLoadableModel = new
LoadableDetachableModel() {
private static final long serialVersionUID = 1L;
/**
* [EMAIL PROTECTED]
*/
@Override
protected final Object load() {
return new PropertyModel(YourPage.this, "articles");
}
};
final ListView newsDetails = new ListView("newsDetails",
articlesLoadableModel){
private static final long serialVersionUID = 1L;
/**
* [EMAIL PROTECTED]
*/
@Override
protected final void populateItem(final ListItem item) {
...
}
};
add(newsDetails);
-----Original Message-----
From: Andrew Broderick [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 29, 2008 2:19 PM
To: '[email protected]'
Subject: RE: getter called multiple times on PropertyModel with ListView
Cannot instantiate LoadableDetachableModel directly .. it is abstract.
Besides, how does it help solve the problem?
Thanks
-----Original Message-----
From: Igor Vaynberg [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 29, 2008 12:49 PM
To: [email protected]
Subject: Re: getter called multiple times on PropertyModel with ListView
ListView newsDetails = new ListView("newsDetails", new
LoadableDetachableModel(new PropertyModel(this, "articles")))
-igor
On Tue, Apr 29, 2008 at 10:46 AM, Andrew Broderick
<[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have a page where I am using a PropertyModel to populate a
ListView, so it will change when the underlying contents change:
>
> ListView newsDetails = new ListView("newsDetails", new
PropertyModel(this, "articles"))
> {
> protected void populateItem(ListItem item)
> {
>
> final NewsDetails nd = (NewsDetails)
item.getModelObject();
> item.add(new Label("articleDate",
nd.getArticleDate()));
> item.add(new Label("articleTime",
nd.getArticleTime()));
> item.add(new Label("newsShortDesc",
nd.getNewsShortDesc()));
> newsUrlLink.add(new Label("newsTitle",
nd.getNewsTitle()));
> item.add(newsUrlLink);
> }
> };
> add(newsDetails);
>
> The page class, obviously, has a getter named getArticles():
>
>
> public List<NewsDetails> getArticles()
> {
> ....
> }
>
> However, this seems to get called multiple times when the listview is
being populated, not just once at the beginning of each time the page is
displayer. Why is this happening? It results in many more hits to the
database than are necessary.
>
> Thanks,
>
> Andrew B
>
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