2 Replies Latest reply on Jan 25, 2007 1:54 PM by gavin.king

Object cached when page parameter not specified

fabio.ita04 Jan 23, 2007 8:10 PM

Hi,

According to Seam App Framework documentation, "when we link to the page with no request parameter, the Create page will be displayed".

But, the behavior I'm really getting is: when clicking "new" button for the first time, a new entity is created. So I click back button, and choose (in a list) a saved entity to edit. Click back button again, and click new button. Here, instead of having a new entity, the page displays the last edited entity.

A) pages.xml

<page view-id="/edit.xhtml">
<param name="id" value="#{home.id}"
 converterId="javax.faces.Long" />
</page>

B) index.xhtml

B1) New Button:
<s:link view="/edit.xhtml" value="#{messages.new}" propagation="begin" />

B2) Edit Button:

<s:link view="/edit.xhtml" value="#{entity.name}" propagation="begin">
 <f:param name="id" value="#{entity.id}" />
</s:link>

Note: If I declare new button with id param, with no value, so the page is correctly displayed:

<s:link view="/edit.xhtml" value="#{entity.name}" propagation="begin">
 <f:param name="id" />
</s:link>

Is it the desired behavior?

Thanx in advance
Fabio.

1. Re: (Solved by extending EntityHome?) Object cached when pag

fabio.ita04 Jan 25, 2007 8:14 AM (in response to fabio.ita04)
When debugging the error, I noticed that even if EntityHome id was changed (via page params), EntityHome was always getting the last entity returned by getInstance. So, I extended EntityHome and called clearDirty inside getInstance method. The problem looks like to be solved. Is it reazonable?

@Override @Transactional public T getInstance() { if (instance==null || clearDirty()) initInstance(); return instance; }

Maybe another way to solve the problem is using explicit conversation id (section 6.6 in Seam 1.1.0 reference). This way I can be sure the desired conversation (and thus the desired state) is loaded. But in some cases (when using EntityHome components, so I can't use annotations) I have to declare it via pages.xml:

<page view-id="/edit.xhtml"> <param name="id" value="#{userManager.id}" /> <begin-conversation nested="true" id="somealias#{id}" /> </page>

Is it possible?

Thanx,
Fábio.
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2. Re: Object cached when page parameter not specified

gavin.king Jan 25, 2007 1:54 PM (in response to fabio.ita04)

I made a similar fix in CVS - please try it out, thanks.
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