Problems passing value to an APEX application URL

Greetings,
My environment is:
Apex 4.0.1
Oracle 11g
Apex Listener (Weblogic 10g)
I am trying to pass a value to an Apex application from outside of Apex. Here is the URL I am using:
http://<servername>:<portno>/apex/f?p=138:2:0::::F138_ID:abcde
What happens when I enter this URL is the Login page is presented and I can successfully log in. I am directed to page 2 but the value of F138_ID is empty. I have tried it with an application item and a page item but still no value is passed. I have tried creating the page item where the value is populated from the application item. I have tried setting the value in a PL/SQL process. (:P2_ID := :P138_ID;) again no luck.
Should this work? And if so, does anyone have any idea why it isn’t?
Thanks for your help,
Larry

Thanks Sarvan,
Unforunatly that did not work. I have been working with it some more and noticed that if the page I am trying to access has an Authentication of 'Page is Public' the passing of the value works as expected. It is only when Authentication is set to 'Page Requires Authentication' (i.e. the user needs to provide a userid and password) that it fails. Do you have any idea how to get around this?
Thanks
Larry

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[#|2011-08-22T11:15:11.462+0200|WARNING|glassfish3.1|javax.enterprise.resource.webcontainer.jsf.lifecycle|_ThreadID=95;_ThreadName=Thread-1;|/project.xhtml @32,42 target="#{userController.userId}": Can't set property 'userId' on class 'org.creagora.server.ejb.managed.UserController' to value 'null'.
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|#]So I wonder : what makes the first example work, that fails in this one ? Where does this 'null' value come from ? I tested every value (project, author, author id), everything is correct. But for some reason, the projectController.project.author.id is not passed to the userController.userId.
If I try to replace
<f:setPropertyActionListener value="#{projectController.project.author.id}" target="#{userController.userId}" />by this (obviously incoherent but syntically correct)
<f:setPropertyActionListener value="#{projectController.project.id}" target="#{userController.userId}" />I don't get the IllegalArgumentException anymore, but the value is still not passed, and the value of userController.userId is never updated, and remains set to 0.
But if I hardcode a valid value :
<f:setPropertyActionListener value="1" target="#{userController.userId}" />It works...
I can't understand why a 'null' value appears from who knows why, given that the only value passed are of long type.
Can you help me ? It's getting frustrating, and I didn't find any help on Google so far...
Thanks!
Xavier
Edited by: 880733 on 22 août 2011 04:04

Ok, I have a little more time now.
You ask how the value can be null when the property is a long. What is happening is that something in the chain is null, e.g. the author is not set on the project. (Although usually you get an exception with that kind of thing.) The EL resolver is actually not really part of JSF, it is a separate library. Furthermore it is weakly typed so it doesn't know what type of thing projectController.project.author.id is until it evaluates it. If something is null along the way, there is no way for it to know whether the end result should have been a long, a Long, a String or anything else.
You asked how to pass values without setPropertyActionListener. It is certainly possible. In fact, I would not be surprised if my entire application did not use setPropertyActionListener. Let's start with the first case. In that situation you were using a dataTable. The customary thing to do is to bind the dataTable to a UIData property in a managed bean. Then, in your action method, you can invoke UIData.getRowData() and get the object instance associated with the row in the table that was activated by the user.
In your second example it is a little difficult to appreciate everything going on without more context but I'll just guess at what I don't know. I'm going to assume you have a simple page here. On the request that generates this page, projectController.project.author.id is known. I imagine the problem is that this is in request scope, causing projectController.project.author.id to be forgotten on the next request. The simplest solution is to store the project somewhere in session scope. I would recommend against putting the Controller classes themselves in the session scope. Instead create a set of beans for session scope and inject them into the Controller classes.
There are many other ways to skin the same cat. Many people object to over-using session scope. So you could store something small like just the id in the session. Or you could pass the id using h:inputHidden. Or you could use Tomahawk's s:saveState.
HTH

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Edited by: J-Lig on Jul 13, 2012 10:20 AM
Edited by: J-Lig on Jul 13, 2012 10:21 AM

Thank you for your feedback!
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the component, each which handles a subset of the fields in the
table. The update method is called with arguments that identify
which subset of fields is to be modified and the values for those
fields.
The forms typically have a couple of radio button groups and
a couple of lists, most of which allow multiple selections. I want
to create a variable for each radio button group and each list. The
variables give the button selected (for the buttons) and a string
of the values selected (for the lists). These are to be passed as
arguments to the update method.
I can construct the variables using standard Java script
statements (if, for,etc.). But if I do, CFINVOKEARGUMENT doesn't
recognize them. The same thing happens if I try to use CFQUERY
directly. I get a message like "variable is undefined". If I try to
set the values using CFSET statements, it doesn't recognize the
form fields. It says the field is not an element of the form.
So I can look at the form fields to create a variable but
then the variable can't be used by the update method. Or I can
create an argument that can be passed to update, but it doesn't
know anything about the form values. I've tried all variations I
can think of with and without #'s and single & double quotation
marks.
Suggestions would be appreciated.

See in line comments.
waz69 wrote:
> Sorry for the delayed response...I was pulled away right
after I posted my
> problem. Here are extracts from the code. I've only
included the sections
> that deal with updating the table.
>
> In the CFC file:
>
> <cffunction access="public" name="SaveFormValues"
output="false"
> returntype="boolean">
> <cfargument name="Screen" type="string"
required="yes">
> <cfargument name="Arg1" type="string"
required="yes">
> <cfargument name="Arg2" type="string"
required="yes">
> <cfargument name="Arg3" type="string"
required="yes">
> <cfargument name="Arg4" type="string"
required="no">
> <cfargument name="Arg5" type="string"
required="no">
> <cfargument name="Arg6" type="string"
required="no">
> <cfset var isSuccessful=true>
> <cftry>
> <cfquery name="SaveValues" datasource="FPDS
Sample">
> UPDATE Report_specs SET
> <cfif arguments.Screen EQ "Scope">
> ReportOn = '#arguments.Arg1#',
> SubtotalGroup = '#arguments.Arg2#',
> Projects = '#arguments.Arg3#',
> Sites = '#arguments.Arg4#'
> </cfif>
> <cfif arguments.Screen EQ "Criteria"> (,,code goes
here for next set of
> fields...) </cfif>
> <cfif arguments.Screen EQ "Table"> (,,code goes
here for next set of
> fields...) </cfif>
> <cfif arguments.Screen EQ "Chart"> (,,code goes
here for next set of
> fields...) </cfif>
> <cfif arguments.Screen EQ "Detail"> (,,code goes
here for next set of
> fields...) </cfif>
> WHERE Report_specs.rid = #Session.FPRU_rid#
> </cfquery>
> <cfcatch type="Database"><cfset
isSuccessful=false></cfcatch>
> </cftry>
> <cfreturn isSuccessful />
> </cffunction>
>
> In the CFM file:
>
> <head>
> <script language="JavaScript">
>
> function SaveValues(frm) {
> var RptOn="", SubGrp="", SL="", PL="" ;
> for(var i=0; i<3; i++)
> {if(frm.ReportOn
.checked) RptOn = frm.ReportOn.value ;
> if(frm.SubtotalGroup
.checked) SubGrp = frm.SubtotalGroup.value ; } ;
> for(i = 0; i < frm.Projects.options.length; i++)
> {if(frm.Projects.options
.selected ) PL = PL + ', ' +
> frm.Projects.options.value ; } ;
> for(i = 0; i < frm.Sites.options.length; i++)
> {if(frm.Sites.options
.selected ) SL = SL + ', ' +
> frm.Sites.options.value ; } ;
>
> ...(This is the section where I'm having problems. I
have the values I want
> to pass the variables just defined.
> But I can't get them into the CFINVOKEARGUMENT
statements below. I've
> tried variations of #'s, CFSETS, etc.)...
>
> <cfobject component="RecordAccess"
name="SaveValues">
> <cfinvoke component="#SaveValues#"
method="SaveFormValues" >
> <cfinvokeargument name="Screen" value="Scope">
> <cfinvokeargument name="Arg1" value="RptOn">
> <cfinvokeargument name="Arg2" value="SubGrpr">
> <cfinvokeargument name="Arg3" value="PL">
> <cfinvokeargument name="Arg4" value="SL">
> </cfinvoke>
> }
>
> </script>
> </head>
This is never going to work. JavaScript is executed on the
client's
computer in the browser. It is no idea of what is CFC is or
how to
access one. The cfc lives on the server, it can only exist
and run
while the http request is being built by the CF engine.
>
> <body onFocus="GetValues(this.form)" >
>
> <form action="" method="post" name="ScopeDetail"
id="ScopeDetail">
> <table width="85%" border="0" cellspacing="2"
cellpadding="2">
> <tr>
>
> ...(various buttons)...
>
> <td width="8%"><input name="SaveForm"
type="button" id="SaveForm"
> onclick="SaveValues(this.form)"
value="Save"></td>
>
> ...(other buttons)...
>
> </table>
>
> <table width="96%" border="0" cellspacing="2"
cellpadding="2">
> <tr>
> ...(column headers)...
> </tr>
>
> <tr>
> <td rowspan="3" align="right"
valign="top"> </td>
> <td height="110" colspan="2" align="right"
valign="top"><div
> align="left">
> <p>
> <label> <input name="ReportOn" type="radio"
value="Users" checked>
> Unique users</label>
> <br>
> <label> <input type="radio" name="ReportOn"
value="AllVisits"> All
> visits</label>
> <br>
> <label> <input name="ReportOn" type="radio"
value="LastVisit"> Last visit
> only</label>
> <br>
> </p>
> </div></td>
> <td rowspan="3" valign="top"> </td>
> <td colspan="3" rowspan="3"
valign="top"><p><select name="Projects"
> size="10" multiple id="Projects"
onChange="getSites(this.form)"><cfoutput
> query="ProjectList">
> <option
>
value="#ProjectList.projectid#">#ProjectList.projectname#</option>
> </cfoutput></select></p></td>
> <td width="3%" rowspan="3"
valign="top"> </td>
> <td width="34%" rowspan="3"
valign="top"><select name="Sites" size="15"
> multiple id="Sites">
> <option> ---------------------------------------
</option>
> </select></td>
> <tr>
> <td height="23" colspan="2" align="right"
valign="top"><div align="left">
> <h3>Show Summaries of </h3>
> </div></td>
> <tr>
> <td height="100" colspan="2" align="right"
valign="top"><div
> align="left">
> <label> <input name="SubtotalGroup"
type="radio" value="Both" checked>
> Project & Sites</label>
> <br>
> <label> <input type="radio"
name="SubtotalGroup" value="Projects">
> Projects only</label>
> <br>
> <label> <input type="radio"
name="SubtotalGroup"
> value="Sites"> Sites only</label>
> </div></td>
>
> </table>
> </form>
> </body>
waz69 wrote:
> I tried creating hidden fields to which I assign my
desired values. The
> CFINVOKEARGUMENTs then become:
>
> <cfinvokeargument name="Arg1" value=frm.Hide1>
> <cfinvokeargument name="Arg2" value=frm.Hide2>
> etc.
>
> What ends up in the table is the name of the field
(frm.Hide1) not
the value
> of the field. I've also tried with with quotes (single
and double)
which give
> the same result and with #'s which gives me an error
about undefined
element.
>
This is what your are going to need to do. But the javascript
form
object no longer exists once the request has been sent to the
server.
After that you are dealing with the "form" structure. So your
arguments
are going to look something like.
<cfinvokeargument name="Arg1" value="#form.Hide1#">
OR interchangeably
<cfinvokeargument name="Arg2" value="#form['Hide2']#">
When blending JavaScript and ColdFusion, one must be
constantly aware of
the order of actions. JavaScript can only run and exist on
the client,
it has no direct knowledge of any ColdFusion variables or
logic.
Vice-a-versa, ColdFusion only runs and exists on the server.
It has no
direct knowledge of the Client or its state.
To blend the two you have to carefully pass any required,
shared
information from one location to the other.

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