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Mary C Apex Trigger Error
We are receiving the following error message from one of the Apex Triggers set up by a consultant:
Apex script unhandled trigger exception
TaskBeforeInsertUpdate: execution of BeforeInsert
caused by: System.NullPointerException: Attempt to de-reference a null object
Trigger.TaskBeforeInsertUpdate: line 61, column 1
I have also attached line 61 of the code in the system. Can someone tell me what is causing this error?
t.Subject = t.Subject + ' - ' + IdContactMap.get(t.WhoId).Name;
Apex script unhandled trigger exception
TaskBeforeInsertUpdate: execution of BeforeInsert
caused by: System.NullPointerException: Attempt to de-reference a null object
Trigger.TaskBeforeInsertUpdate: line 61, column 1
I have also attached line 61 of the code in the system. Can someone tell me what is causing this error?
t.Subject = t.Subject + ' - ' + IdContactMap.get(t.WhoId).Name;
Before assigning the value, check the map whether it contains the key, value or not.
like: IdContactMap.containsKey(t.WhoId) && IdContactMap.get(t.WhoId) != Null
9 trigger TaskBeforeInsertUpdate on Task (before insert, before update) {
10
11 Set<Id> LeadIdSet = new Set<Id>();
12 Set<Id> ContactIdSet = new Set<Id>();
13 for(Task t : trigger.new){
14 if(t.WhoId != null){
15 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Lead')
16 LeadIdSet.add(t.WhoId);
18 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Contact')
19 ContactIdSet.add(t.WhoId); }}
20
21 Map<Id,Lead> IdLeadMap = new Map<Id,Lead>([Select id, Name From Lead Where Id IN :LeadIdSet]);
22 Map<Id,Contact> IdContactMap = new Map<Id,Contact>([Select id, Name From Contact Where Id IN :ContactIdSet]);
23
24 for(Task t : trigger.new){
25
26 if(Trigger.isUpdate){
27 String TaskSuffix;
28
29 if(t.WhoId != null){
30 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Lead'){
31 TaskSuffix = ' - ' + IdLeadMap.get(t.WhoId).Name;
32 if(t.Subject != trigger.oldMap.get(t.Id).Subject){
33 if(!(t.Subject.contains(TaskSuffix)) && !(trigger.oldMap.get(t.Id).Subject.contains(TaskSuffix))){
34 t.Subject = t.Subject + TaskSuffix; }}}
35
36 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Contact' ){
37 TaskSuffix = ' - ' + IdContactMap.get(t.WhoId).Name;
38
39 if(!(t.Subject.contains(TaskSuffix)) && trigger.oldMap.get(t.Id).Subject.contains(TaskSuffix)){
40 t.Subject = t.Subject + TaskSuffix;}}}}
41
42 else{
43 if(t.WhoId != null){
44 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Lead')
45 t.Subject = t.Subject + ' - ' + IdLeadMap.get(t.WhoId).Name;
46
47 if(t.WhoId.getSObjectType().getDescribe().getName() == 'Contact' )
48 t.Subject = t.Subject + ' - ' + IdContactMap.get(t.WhoId).Name;}}}