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# Apex Triggers
- URL: https://www.namastesalesforce.com/training/apex-triggers/
- Published: 2025-07-07T09:00:00.000Z
- Updated: 2025-07-07T09:00:00.000Z
- Description: One trigger per object, logic in handlers, bulk-safe by default — the discipline that keeps automation debuggable.
- Author: Swarnil Singhai
- Tags: Apex Triggers, #module, #Import 2026-09-03 19:13

One trigger per object, logic in handlers, bulk-safe by default — the discipline that keeps automation debuggable.

## What you'll learn

The order of execution as a map you can actually navigate, the one-trigger-per-object rule and the handler pattern that enforces it, bulkification as a reflex rather than a review comment, and recursion control that does not break batch two.

## Prerequisites

Apex for Absolute Beginners through lesson 05, or working knowledge of classes, SOQL and DML. Every section assumes you can deploy a class to a Developer Edition.

## How the sections chain

Five sections in publish order: first the map (what runs when you press Save), then the rule, then the pattern that implements the rule, then the discipline that keeps it fast at 200 records — and finally the guard that keeps it from calling itself.

## What you'll be able to do

- Sequence any save's automation from memory
- Refactor multi-trigger objects to one trigger + handler
- Write collect–query–map–loop–DML without thinking
- Test at 200 records, not one
- Break recursion with an Id set, not a boolean