NullPointerException occurs during rendering Visualforce Email Template when Visualforce Email Template refers to relationship fields of relatedTo obj
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NullPointerException occurs during rendering Visualforce Email Template when Visualforce Email Template refers to relationship fields of relatedTo obj

VisualForce

Last updated 2019-09-07 ·Reference W-5420212 ·Reported By 14 users

Fixed - Winter '20

Summary
NullPointerException occurs during rendering Visualforce Email Template when Visualforce Email Template refers to relationship fields of relatedTo object.

Repro
1. Create the following Visualforce email template

Name : TestEtemplate
---
<messaging:emailTemplate subject="Test:{!relatedTo.Name}" recipientType="User" relatedToType="Account">
<messaging:plainTextEmailBody >
{!relatedTo.Name}!!
<apex:repeat value="{!relatedTo.Contacts}" var="cnt">
{!cnt.FirstName} {!cnt.LastName}
</apex:repeat>
</messaging:plainTextEmailBody>
</messaging:emailTemplate>
---

2. create an Approval Process for Account and activate it
Name : TestApproval
Entry Criteria : Account: Account Name EQUALS Test
Approval Assignment Email Template: TestEtemplate (was created in Step 1)
Initial Submitters: Account Owner


3. create the following Apex class
---
public class testClass {
public Id acctId { set; get; }
public testClass(ApexPages.StandardController cont) {
SObject obj = cont.getRecord();
if (obj != null) {
acctId = obj.Id;
}
}

public PageReference doTest() {
createApproval(acctId);
return null;
}

private static void createApproval(Id recId) {
Approval.ProcessSubmitRequest req1 = new Approval.ProcessSubmitRequest();
req1.setObjectId(recId);
Approval.ProcessResult result = Approval.process(req1);
}
}
---
4. create the following Visualforce page
Name : testVFpage
---
<apex:page standardController="Account" extensions="testClass">
<apex:form >
<apex:commandButton value="DOTEST" action="{!doTest}" rendered="{!acctId != null}"/>
</apex:form>
</apex:page>
---
5. run the following Apex code for creating data via Developer Console
---
Account acct = new Account(Name='Test');
insert acct;

List<Contact> cnts = new List<Contact>();
for(Integer i=0; i < 2000; i++) {
Contact cnt = new Contact(FirstName='Test', LastName='User' + i, AccountId=acct.Id);
cnts.add(cnt);
}
insert cnts;
---
6. check the created Account
note id of the Account.

7. access Visaulforce page with Id of Account which was created in Step 5 as follows
http://hostname:port/apex/testVFpage?id={Account Id}
You will see "DOTEST" button.

8. click on "DOTEST" button
You will see the following error occurs.
---
Process failed. First exception on row 0; first error: UNKNOWN_EXCEPTION, java.lang.NullPointerException: []
Error is in expression '{!doTest}' in component <apex:commandButton> in page testVFpage: Class.testClass.createApproval: line 18, column 1
Class.testClass.doTest: line 11, column 1

Workaround
The workaround is to submit Approval Process from async Apex.
For instance, Future method.
---
public class testClass {
public Id acctId { set; get; }
public testClass(ApexPages.StandardController cont) {
SObject obj = cont.getRecord();
if (obj != null) {
acctId = obj.Id;
}
}

public PageReference doTest() {
createApproval(acctId);
return null;
}

@Future
private static void createApproval(Id recId) {
Approval.ProcessSubmitRequest req1 = new Approval.ProcessSubmitRequest();
req1.setObjectId(recId);
Approval.ProcessResult result = Approval.process(req1);
}
}

Is it Fixed?

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