I keep getting a null pointer exception error as follows :

System.NullPointerException: Attempt to de-reference a null object Stack Trace: Class.ColloTest_utoStudentIDTrigger.test_latestStudentID: line 20, column 1

trigger AutoStudentIDTrigger on Contact(before insert) {

 list <Contact> l1 =
  [SELECT Id, Type_of_bursary_contact__c, Student_ID_New__c, Do_Not_Auto_Generate_Student_ID__c FROM Contact WHERE
   Type_of_bursary_contact__c = 'Student'
   AND RecordTypeId in (SELECT Id FROM RecordType WHERE Name = 'Bursary Contact') AND Student_ID_New__c != NULL
   ORDER BY Student_ID_New__c desc limit 1

 list <Contact> l2 =
  [SELECT Id, Beneficiary_Number__c, Role_in_group__c FROM Contact WHERE
   RecordTypeId in (SELECT Id FROM RecordType WHERE Name = 'Community Contact') AND Beneficiary_Number__c != NULL
   ORDER BY Beneficiary_Number__c desc limit 1

 Integer l1size = l1.size();
 Integer l2size = l2.size();

 Decimal NewLatestStudentID = 0.0;
 Decimal NewLatestBeneficiaryID = 0.0;

 If(l1size > 0) {
  try {
   NewLatestStudentID = l1[0].Student_ID_New__c;

  Catch(System.NullPointerException e) {
   System.debug('The following exception has occurred: ' + e.getMessage());

 If(l2size > 0) {
  NewLatestBeneficiaryID = l2[0].Beneficiary_Number__c;

 If(trigger.isInsert) {
  for (Contact li: Trigger.new) {

   If(li.Type_of_bursary_contact__c == 'Student' & li.Do_Not_Auto_Generate_Student_ID__c == FALSE) {
    li.Student_ID_New__c = NewLatestStudentID + 1;

   If(li.Role_in_group__c != Null & li.Do_Not_Auto_Generate_Beneficiary_Number__c == FALSE) {
    li.Beneficiary_Number__c = NewLatestBeneficiaryID + 1;

I've tried everything to fix this but I don't understand why this error is occurring. I've instantiated all my variables, when I run my test it works great, why is this happening on deployment? Thanks in advance

Test Code as shown below:

  private class ColloTest_utoStudentIDTrigger{

  static testmethod void test_latestStudentID(){

    Id BCrtid1 = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('Bursary Contact').getRecordTypeId();

    Contact ct1 = new Contact();
    ct1.LastName = 'Student Last Name';
    ct1.FirstName = 'Student First Name';
    ct1.Email = '[email protected]';
    ct1.MobilePhone = '0725888886';
    ct1.Type_of_bursary_contact__c = 'Student';
    ct1.RecordtypeId = BCrtid1;

    insert ct1;
    system.debug('ct1 inserted');                

    Id CCrtid1 = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('Community Contact').getRecordTypeId();

    Contact cct1 = new Contact();
    cct1.LastName = 'Student Last Name';
    cct1.FirstName = 'Student First Name';
    cct1.Email = '[email protected]';
    cct1.MobilePhone = '0725834986';
    cct1.Role_in_group__c = 'Secretary';
    cct1.RecordtypeId = CCrtid1;

    insert cct1;
    system.debug('cct1 inserted');        

  • 1
    where is your test code? Your problem could be there, not on the trigger Feb 22, 2019 at 5:06
  • Just added the test code
    – Rufus K.
    Feb 22, 2019 at 6:14
  • What is line 20
    – Eric
    Feb 22, 2019 at 6:17
  • Line 20 of the test code? Id CCrtid1 = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('Community Contact').getRecordTypeId();
    – Rufus K.
    Feb 22, 2019 at 6:19
  • It's your record type - it must be a typo. If you want to try another way of getting the record type, try hard coding the id (just for verification) or use SOQL to query the record type. Feb 22, 2019 at 10:04

3 Answers 3


I don't know if this will fix your null pointer error (it could) but you have a problem with your if statement at the bottom of the trigger.

You have used an & (bitwise AND) rather than an && (logical AND) in your statement.

This means that it could evaluate to true unexpectedly (or never evaluate to true)

Replace this:

If(li.Type_of_bursary_contact__c == 'Student' & li.Do_Not_Auto_Generate_Student_ID__c == FALSE) {

With this:

If(li.Type_of_bursary_contact__c == 'Student' && li.Do_Not_Auto_Generate_Student_ID__c == FALSE) {

(Do this with the similar statement below it also)

Also, it's possible for Boolean values to be... er... not Boolean in Apex - ie they can be true, false and also... null

So in this same line, you should first check that li.Do_Not_Auto_Generate_Student_ID__c is not only true but is also not null

  • Hi @casparharmer, just tried, same exact error
    – Rufus K.
    Feb 22, 2019 at 6:40

Can you just try to get ID with the help of developer Name like this

Id RecordTypeIdContact = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('DeveloperNameOfRecordType').getRecordTypeId();

in test class and then use it


You are getting the recordtype “Community Contact” from the map and it does not exist. DeveloperName do not have spaces they have _ but since you are using record type names I think may but you may have the name wrong.

You should also be checking if the key exits before dereferencing as a best practice.

You can also debug the keys to see what they actually are to see if you have it right

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