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Wylie Peach Trigger: Concatenate multiple fields in an External ID
Hi everyone,
I am trying to write a Trigger (before insert, before update) that will create a composite key on a Purchases__c custom object. The data is coming in, but has no unique ID. Purchases__c has custom fields like Event_name, section_Name, row_name etc, that I need to concatenate into a custom field Key__c which is an external ID. I am fairly new to triggers and was hoping for some guidance on how to start going about it. I am pretty sure I am way off and probably overthinking this. Any sort of suggestion would help. Here is what I have so far:
trigger Composite_Key on Purchases__c (before insert, before update) {
//need to assign Key__c field with concatenated values
//Event_name
//section_Name
//row_name
//seat_num
//num_seats
//add_datetime
if(Trigger.isBefore)
{
if(Trigger.isInsert)
{
Key__c key = new Key__c();
key.Event_name = Trigger.new[0].name;
}
else if(Trigger.isUpdate)
{
//code here
}
}
}
I am trying to write a Trigger (before insert, before update) that will create a composite key on a Purchases__c custom object. The data is coming in, but has no unique ID. Purchases__c has custom fields like Event_name, section_Name, row_name etc, that I need to concatenate into a custom field Key__c which is an external ID. I am fairly new to triggers and was hoping for some guidance on how to start going about it. I am pretty sure I am way off and probably overthinking this. Any sort of suggestion would help. Here is what I have so far:
trigger Composite_Key on Purchases__c (before insert, before update) {
//need to assign Key__c field with concatenated values
//Event_name
//section_Name
//row_name
//seat_num
//num_seats
//add_datetime
if(Trigger.isBefore)
{
if(Trigger.isInsert)
{
Key__c key = new Key__c();
key.Event_name = Trigger.new[0].name;
}
else if(Trigger.isUpdate)
{
//code here
}
}
}
Try the below trigger:
trigger Composite_Key on Purchases__c (before insert, before update) {
if(Trigger.isBefore)
{
for(Purchases__c purchase : trigger.new)
{
String eventName = String.isBlank(purchase.Event_name)?'':purchase.Event_name+'-';
String sectionName = String.isBlank(purchase.section_Name)?'':purchase.section_Name+'-';
String rowname = String.isBlank(purchase.row_name)?'':purchase.row_name+'-';
String seatnum = String.isBlank(String.valueOf(purchase.seat_num))?'':String.valueOf(purchase.seat_num)+'-';
String numseats = String.isBlank(String.valueOf(purchase.num_seats))?'':String.valueOf(purchase.num_seats)+'-';
String adddatetime = String.isBlank(String.valueOf(purchase.add_datetime))?'':String.valueOf(purchase.add_datetime);
purchase.Key__c = eventName + sectionName + rowname + seatnum + numseats + adddatetime;
}
}
}
Thanks,
Maharajan.C
All Answers
Try the below trigger:
trigger Composite_Key on Purchases__c (before insert, before update) {
if(Trigger.isBefore)
{
for(Purchases__c purchase : trigger.new)
{
String eventName = String.isBlank(purchase.Event_name)?'':purchase.Event_name+'-';
String sectionName = String.isBlank(purchase.section_Name)?'':purchase.section_Name+'-';
String rowname = String.isBlank(purchase.row_name)?'':purchase.row_name+'-';
String seatnum = String.isBlank(String.valueOf(purchase.seat_num))?'':String.valueOf(purchase.seat_num)+'-';
String numseats = String.isBlank(String.valueOf(purchase.num_seats))?'':String.valueOf(purchase.num_seats)+'-';
String adddatetime = String.isBlank(String.valueOf(purchase.add_datetime))?'':String.valueOf(purchase.add_datetime);
purchase.Key__c = eventName + sectionName + rowname + seatnum + numseats + adddatetime;
}
}
}
Thanks,
Maharajan.C