Variable coming from a session attribute

Question

Hello, I am developing a web application with JDeveloper 10g
I've got a View Object which is basically a query, where I use a variable:
WHERE BbCustomerOrderStatusTab.CUSTNO = :CustomerNumber
When I define CustomerNumber in a form, it works:
<af:panelForm>
<af:inputText value="#{bindings.CustomerNumber.inputValue}"
label="#{bindings.CustomerNumber.label}"
required="#{bindings.CustomerNumber.mandatory}"
columns="#{bindings.CustomerNumber.displayWidth}">
<af:validator binding="#{bindings.CustomerNumber.validator}"/>
</af:inputText>
<af:commandButton actionListener="#{bindings.ExecuteWithParams.execute}"
text="ExecuteWithParams"
disabled="#{!bindings.ExecuteWithParams.enabled}"/>
</af:panelForm>
But I would like CustomerNumber to come from a session attribute. I tried something like that:
session.setAttribute("CustomNum","IRI0001");
setCustomerNumber(session.getAttribute("CustomNum"));
with the View Object Editor -> Client Interface setCustomerNumber selected, but it doesn't work.
I tried :
String CustNum=session.getAttribute("CustomNum");
%>
<af:attribute name="#{bindings.CustomerNumber}"
value="<%= CustNum%>"/>
but it tells me that "Attribute value does not accept runtime expressions".
Does someone know how I could do that?
Thanks,
Romain

Answer 1

Hi,
Frank's suggestion should work.
Most importantly, don't forget to declare your bind variable in your view object !!
Your statement looks odd to me
String CustNum=session.getAttribute("CustomNum");
%>
<af:attribute name="#{bindings.CustomerNumber}"
value="<%= CustNum%>"/>
There are many ways to do it. You may try using backing bean for command button's actionlistener or action like the following
class myBackingBean
private String CustNum; //of course with getter and setter method
myButtonAction() {
CustNum = yourFavouriteValue;
OperationBinding ob = getBindings().getOperationBinding("ExecuteWithParams"};
ob.execute();
note you must declare CustomValue in your pageDef's binding to #{yourBackBeanClass.CustNum} in your ExecuteWithParams binding
I don't know and seems not being recommended to set session value in jspx.
Another way is inside your command button in the jspx
<af:setActionListener from="#{somesource.value}"
to="#{processScope.CustNum}"/>
in such case, you must declare CustomValue in your pageDef's binding to #{processScope.CustNum} in your ExecuteWithParams binding
If you have already set session value somewhere beforehand, then what you need to do is simply declare CustomValue in your pageDef's binding to #{sessionScope.CustNum} in your ExecuteWithParams binding.
I did lot of ExecuteWithParams thing and no problems occur so far.