Apex Developer Guide
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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:
- Edit either a class or trigger, and click Version Settings.
- Select the Version of the Salesforce API. This version is also the version of Apex associated with the class or trigger.
- 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:
// This class is saved using Salesforce API version 13.0
// Version 13.0 does not include the Idea.categories field
global class C2
{
global Idea insertIdea(Idea a) {
insert a; // category field set to null on insert
// retrieve the new idea
Idea insertedIdea = [SELECT title FROM Idea WHERE Id =:a.Id];
return insertedIdea;
}
}The following class is saved using Salesforce API version 16.0:
@IsTest
// This class is bound to API version 16.0 by Version Settings
private class C1
{
static testMethod void testC2Method() {
Idea i = new Idea();
i.CommunityId = '09aD000000004YCIAY';
i.Title = 'Testing Version Settings';
i.Body = 'Categories field is included in API version 16.0';
i.Categories = 'test';
C2 c2 = new C2();
Idea returnedIdea = c2.insertIdea(i);
// retrieve the new idea
Idea ideaMoreFields = [SELECT title, categories FROM Idea
WHERE Id = :returnedIdea.Id];
// assert that the categories field from the object created
// in this class is not null
System.assert(i.Categories != null);
// assert that the categories field created in C2 is null
System.assert(ideaMoreFields.Categories == null);
}
}