Apex Triggers

Apex ProgrammingApex TriggersWrite bulk-safe, maintainable triggers: events and context variables, before vs after logic, field-level errors, correct recursion control, a minimal handler framework with metadata and permission-based bypass, standard-object quirks, and how triggers coexist with Flow.Intermediate · about 80 minutesWhat you will learn

Choose the right trigger event and use Trigger context variables correctly

Decide when logic belongs in a before trigger versus an after trigger

Write fully bulkified trigger logic and add record- and field-level errors

Explain why Boolean recursion flags are dangerous and implement Id-based recursion control

Build a one-trigger-per-object handler framework with bypass via custom metadata and custom permissions

Anticipate standard-object quirks (lead convert, merge, cascade delete) and coexist with record-triggered flows

Contents

Trigger syntax and events

Context variables

Before vs after

Bulkification: the non-negotiable rule

addError: record and field errors

Recursion control

One trigger per object and handler frameworks

Standard object quirks

Triggers and Flow: coexistence

Change Data Capture and platform event triggers (preview)

Testing triggers

Best practices

Common pitfalls

Hands-on exercises

Key takeaways