Here is apex trigger to update account related contacts when Email of account is updated. We have created a new custom fields on account named as email and if email got updated we want to set that email to all the associated contacts.
trigger AccountTrigger2 on Account(after update) {
Set < Id > accountIdSet = new Set < Id > ();
for (Id accountId: Trigger.NewMap.keySet()) {
if (Trigger.OldMap.get(accountId).Email__c != Trigger.NewMap.get(accountId).Email__c) {
accountIdSet.add(accountId);
}
}
List < Contact > lstContact = [SELECT id, Email, AccountId FROM Contact where AccountId In: accountIdSet];
List < Contact > contactToUpdate = new List < Contact > ();
for (Contact con: lstContact) {
Contact contact = new Contact(Id = con.Id);
contact.Email = Trigger.NewMap.get(con.AccountId).Email__c;
contactToUpdate.add(contact);
}
if (!contactToUpdate.isEmpty()) {
update contactToUpdate;
}
}
In this video we have discussed the trigger in detail.
