Unknown property StandardController.

Hello All ,

I am using a very simple VFP and Apex extension and getting this error where ideally it should not throw this error

VFP :
<apex:page standardController="UAL_Customer_Services__c" extensions="UALServicesPDF" standardstylesheets="false" renderAs="pdf" applyHtmlTag="false" showHeader="false" sidebar="false">
<apex:pageMessages ></apex:pageMessages>
<html>
<head>
<style type="text/css" media="print">
@page {
size: A4 relative;
margin-top:3cm;
margin-bottom:0.5cm;
margin-left:17px;
margin-right:20px;

@top-center {
content: element(header);
}
@bottom-center {
content: element(footer);
}

}
table, th, td
{
border-collapse: collapse;
}
div.header {
padding:5px;
position: running(header);
}
body
{
font-family: Calibri, Candara, Segoe, 'Segoe UI', Optima, Arial, sans-serif;//'Trebuchet MS', 'Lucida Grande', 'Lucida Sans Unicode', 'Lucida Sans', Tahoma, sans-serif;
font-weight:normal;
font-size:14px;
mso-line-height-rule: exactly;
}
div.footer {
padding:5px;
position: running(footer);
}
ms{
padding:5px;
}
</style>
</head>
<body>
<div Style="margin:2px;">
<p style="font-size:larger;text-align:center;font-weight: bold;" >UAL INDUSTRIES LIMITED</p>
       <p style="font-size:larger;text-align:center;font-weight: bold;" >Loss Assessment for the period</p>
       <p style="font-size:larger;text-align:center;font-weight: bold;" >PRODUCT TYPE - KAILASH GOLD</p>
       <p style="font-size:larger;text-align:center;font-weight: bold;" >STORAGE LOCATION - U101</p>
       <p style="font-size:larger;text-align:center;font-weight: bold;" >Date of Inspection - 25.06.2023</p>
       </div>

<div><table border="1" width="100%" Style="margin:2px;">
<tr><td width="50%">DOCUMENT NO.</td><td>{!UAL_Customer_Services__c.name}</td></tr>
       <tr><td width="50%">DOCUMENT DATE </td><td><apex:outputText value="{0,date,dd'/'MM'/'yyyy}"><apex:param value="{!UAL_Customer_Services__c.Entry_Date__c}"/></apex:outputText> </td></tr>
<tr><td width="50%">MAIN PARTY</td><td>{!UAL_Customer_Services__c.Dealer_Name__r.name}</td></tr>
<tr><td width="50%">ADDRESS</td><td>{!UAL_Customer_Services__c.Dealer_Name__r.Address_1__c}</td></tr>
<tr><td width="50%">PIN CODE</td><td>{!UAL_Customer_Services__c.Dealer_Name__r.PIN_Code__c}</td></tr>
       <tr><td width="50%">STATE</td><td>{!UAL_Customer_Services__c.Dealer_Name__r.Region__c}</td></tr>
       <tr><td width="50%">Party Code</td><td>{!UAL_Customer_Services__c.Dealer_Code__c}</td></tr>
<tr><td width="50%">ASSESSMENT TYPE</td><td>BREAKAGE LOSS ASSESSMENT</td></tr></table></div>


<div><table border="1" width="100%"><tr>
<th width="20%" style="text-align:center;">Size</th>
<th width="15%" style="text-align:center;">Input(MTR)</th>
<th width="15%" style="text-align:center;">Input(MT)</th>
               <th width="15%" style="text-align:center;">Output(MTR)</th>
<th width="15%" style="text-align:center;">Output(MT)</th>
               <th width="10%" style="text-align:center;">Loss(MTR)</th>
<th width="10%" style="text-align:center;">Loss(MT)</th>
               </tr>
<apex:repeat value="{!UalSvmstlist}" var="SvDtllist">
<tr>

</tr></apex:repeat>
</table></div>
</body>
       </html>

APEX :
public with sharing class UALServicesPDF {
public Id aids {set;get;}
LIST<UAL_Customer_Services__c> UalSvmstlist {set;get;}
LIST<UAL_Customer_Service_Details__c> UalSvDtllist {set;get;}

public UALServicesPDF(Apexpages.StandardController std){
aids=Apexpages.currentPage().getParameters().get('Id');

UalSvmstlist = [SELECT id, name from UAL_Customer_Services__c where id = :aids];

UalSvDtllist = [SELECT
UAL_Customer_Services__c,
Size__c,
Input_MT__c,
Available_Size_m__c,
Output_MT__c,
Loss_MTR__c,
Loss_MT__c,
Corrugation__c
FROM
UAL_Customer_Service_Details__c
WHERE
UAL_Customer_Services__r.id = :aids];
}
}

July 17, 2023
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Best Answer chosen by Debaranjan Ghosh

Swetha (Salesforce Developers)
HI Debaranjan,
Can you modify your apex class as below and see if it fixes the error:
public with sharing class UALServicesPDF { public Id aids { get; set; } public List<UAL_Customer_Services__c> UalSvmstlist { get; private set; } public List<UAL_Customer_Service_Details__c> UalSvDtllist { get; private set; } public UALServicesPDF(Apexpages.StandardController std) { aids = Apexpages.currentPage().getParameters().get('Id'); UalSvmstlist = [SELECT id, name from UAL_Customer_Services__c where id = :aids]; UalSvDtllist = [SELECT ... FROM UAL_Customer_Service_Details__c WHERE UAL_Customer_Services__r.id = :aids]; } }
By changing private set; to public get; private set;, the UalSvmstlist property will be accessible in the Visualforce page

Additionally, you mentioned that you tried <apex:repeat value="{!UalSvDtllist}" var="SvDtllist"> and encountered an error as well. If you face any issues with UalSvDtllist, ensure that the SELECT statement inside the Apex extension is correctly retrieving the necessary data from the UAL_Customer_Service_Details__c object.

If this information helps, please mark the answer as best. Thank you

July 17, 2023
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Debaranjan Ghosh
And the Error is "Unknown property 'UAL_Customer_Services__cStandardController.UalSvmstlist'" I tried with
<apex:repeat value="{!UalSvDtllist}" var="SvDtllist"> 1st and that also gave error and just to test I tried with UalSvmstlist?
This is really frustatting as I have used this many times earlier

July 17, 2023
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This was selected as the best answer

Debaranjan Ghosh
Thank you so much Sweta for your time and the solution !

After seeing your reply what I did

Chnage

LIST<UAL_Customer_Services__c> UalSvmstlist { set; get;}
LIST<UAL_Customer_Service_Details__c> UalSvDtllist {set; get;}

to

public LIST<UAL_Customer_Services__c> UalSvmstlist { set; get;}
public LIST<UAL_Customer_Service_Details__c> UalSvDtllist {set; get;}

and it fixed the problem
With out seeing your reply it was hard to find out that I have not placed public before the two list
Thanks Again
Debaranjan Ghosh

July 17, 2023
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