Question

How do you apply the addError() method to an sObject?

Answer 1

The addError() method is applied to an sObject to add a custom error message, preventing any DML operations if there's a violation. It is typically called within an if statement that checks a condition, and if the condition is true, the addError() method is invoked on the sObject, passing the custom error message as an argument.

Step-by-step explanation:

To apply the addError() method to an sObject in Salesforce, you would typically be working within an Apex class or trigger. The addError() method is used to add a custom error message to the sObject, which will prevent any DML (Data Manipulation Language) operations from being committed if the transaction causes a validation rule to fail or if the addError() method is called.

Here is an example of how you might use the addError() method:

Account myAccount = new Account(Name='Test Account');
try {
// Perform some sort of validation
if (myAccount.Name.contains('Invalid')) {
myAccount.addError('The account name is invalid.');
}
// Trying to perform a DML operation
insert myAccount;
} catch (Exception e) {
// Handle the exception
}
The above code snippet checks whether the account name contains the string 'Invalid'. If it does, the addError() method is called on the myAccount object and a custom error message is added. When the insert operation is performed, it is blocked by the error, and the catch block can then handle the exception that is thrown as a result.