ONE DAY SALE

Free Salesforce Developers Tutorials >

Chapter - 9 Apex Triggers >

Trigger.old

Trigger.old

What You’ll Learn


S2 Labs

Trigger.old

This variable returns a list of the old version of sObject records. This list is only available in update and delete triggers

 

trigger ApexTrigger on Opportunity(before update) {
    // Only available in Update and Delete Triggers 
    for (Opportunity oldOpp: Trigger.old) {
        for (Opportunity newOpp: Trigger.new) {
            if (oldOpp.Id == newOpp.Id && oldOpp.Amount != newOpp.Amount) newOpp.Amount.addError('Amount cannot be changed'); // Trigger Exception 
        }
    }
}

Salesforce Developer

Download Study Material

Get access to exclusive study material for Salesforce Certification and ace your exams!

Download Now

Our Salesforce Certification Courses

Hey there! Glad you made it through our Salesforce Developer Training for beginners . But wait! We've got some high-in-demand Salesforce courses for you to take your Salesforce skills to the next level, making you a desired professional in the Salesforce job market.

Post a Comment

Your email address will not be published. Required fields are marked *