Why a Trigger Framework Matters
By the end of this lesson, you'll be able to:
- Explain the risks of multiple triggers on the same object
- Describe the one-trigger-per-object pattern with a handler class
Prerequisites: None — this is the first lesson in the course.
The problem with multiple triggers
If AccountTrigger1 and AccountTrigger2 both exist on Account, their relative execution order isn't guaranteed or easily controllable. Bugs from this are subtle and hard to reproduce, especially as an org grows and different teams add triggers independently over time.
One trigger, one handler class
A single trigger per object, containing only a call into a handler class's method for the current trigger context (AccountTriggerHandler.run();) — all the real logic lives in ordinary, testable Apex classes instead of trigger body code, and there's exactly one place to see everything that happens when an Account is saved.
A trigger that delegates entirely
trigger AccountTrigger on Account (before insert, before update, after update) {
new AccountTriggerHandler().run();
}The trigger itself does nothing but delegate — every real decision about what runs, and in what order, lives in AccountTriggerHandler, where it is easy to read, test, and reason about.
Exercise
Rewrite this trigger, which contains business logic directly, to delegate to a handler class instead.
Show hint
The trigger body should shrink to a single line calling into a handler.
Why a Trigger Framework Matters — Quick Check
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Summary
Salesforce doesn't guarantee execution order across multiple triggers on the same object — a trigger framework funnels all of an object's automation through one trigger and a handler class, giving you one predictable place to control order and see the full picture.