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mw6 update lookup field on custom object using trigger
I have the below trigger
I am using another trigger to create a person account when a new student is created. After this when the student enroll to a course, a new class allocation is created in 'Class_Allocation__c object. Once this record is created, I want to copy the contact.id into a lookup field 'Related_Contact__c' on Class_Allocation__C, not sure what is wrong with the trigger.
From Student__C when a person account is created, I am storing ID (Salesforce) and Student ID into Contact fields Salesforce_Id_from_Student_Object__c, Student_Id_from_Student_Prospects__c fields. I am using the Student_Name__C field from class_allocation__c to match from Contact 'Student_Id_from_Student_Prospects__c'
No error, and the 'Related_Contact__C on Class_Allocation__c (look up) is not getting populated. Can anybody help on this
trigger Updatecontactidonclassallocation on Class_Allocation__c (after insert) {
Set<Id> AllocIds = new Set<Id>();
for (Class_Allocation__c dReg : Trigger.new)
AllocIds.add(dReg.Student_Name__C);
map<id, contact> userContact =
new map<id, contact>([SELECT Id,Student_Id_from_Student_Prospects__c,Salesforce_Id_from_Student_Object__c FROM contact
WHERE Student_Id_from_Student_Prospects__c IN:AllocIds]);
for(Class_Allocation__c o: trigger.new){
if(o.Related_Contact__C == '') {
o.Related_Contact__C = userContact.get(o.ID).Id;
}
}
}
I am using another trigger to create a person account when a new student is created. After this when the student enroll to a course, a new class allocation is created in 'Class_Allocation__c object. Once this record is created, I want to copy the contact.id into a lookup field 'Related_Contact__c' on Class_Allocation__C, not sure what is wrong with the trigger.
From Student__C when a person account is created, I am storing ID (Salesforce) and Student ID into Contact fields Salesforce_Id_from_Student_Object__c, Student_Id_from_Student_Prospects__c fields. I am using the Student_Name__C field from class_allocation__c to match from Contact 'Student_Id_from_Student_Prospects__c'
No error, and the 'Related_Contact__C on Class_Allocation__c (look up) is not getting populated. Can anybody help on this
trigger Updatecontactidonclassallocation on Class_Allocation__c (after insert) {
Set<Id> AllocIds = new Set<Id>();
for (Class_Allocation__c dReg : Trigger.new)
AllocIds.add(dReg.Student_Name__C);
map<id, contact> userContact =
new map<id, contact>([SELECT Id,Student_Id_from_Student_Prospects__c,Salesforce_Id_from_Student_Object__c FROM contact
WHERE Student_Id_from_Student_Prospects__c IN:AllocIds]);
for(Class_Allocation__c o: trigger.new){
if(o.Related_Contact__C == '') {
o.Related_Contact__C = userContact.get(o.ID).Id;
}
}
}
after insert : Can change fields using trigger.new = Not allowed. A runtime error (not during the compilation) is thrown, as trigger.new is already saved. Fortunately, if(o.Related_Contact__C == '') is always false (null value).
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_triggers_context_variables_considerations.htm
before insert: Can change fields using trigger.new = Allowed
trigger Updatecontactidonclassallocation on Class_Allocation__c (before insert) {
...
for(Class_Allocation__c o: trigger.new){
if (String.isEmpty(o.Related_Contact__C)) {
o.Related_Contact__C = userContact.get(o.ID).Id;
}
}
}
Regards