Apex Developer Guide

Apex Developer Guide
Release Notes
Getting Started with Apex
Writing Apex
Data Types and Variables
Control Flow Statements
Classes, Objects, and Interfaces
Classes
Interfaces
Keywords
Annotations
Classes and Casting
Differences Between Apex Classes and Java Classes
Class Definition Creation
Namespace Prefix
Apex Code Versions
Setting the Salesforce API Version for Classes and Triggers
Setting Package Versions for Apex Classes and Triggers
Lists of Custom Types and Sorting
Using Custom Types in Map Keys and Sets
Working with Data in Apex
Running Apex
Debugging, Testing, and Deploying Apex
Apex Reference
Appendices
PDF

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Setting the Salesforce API Version for Classes and Triggers

To set the Salesforce API and Apex version for a class or trigger:

  1. Edit either a class or trigger, and click Version Settings.
  2. Select the Version of the Salesforce API. This version is also the version of Apex associated with the class or trigger.
  3. Click Save.

If you pass an object as a parameter in a method call from one Apex class, C1, to another class, C2, and C2 has different fields exposed due to the Salesforce API version setting, the fields in the objects are controlled by the version settings of C2.

In this example, the Categories field is set to null after calling the insertIdea method in class C2 from a method in the test class C1, because the Categories field isn’t available in version 13.0 of the API.

The first class is saved using Salesforce API version 13.0:

The following class is saved using Salesforce API version 16.0: