Hi everyone,

We have a requirement to send a templated email to the manager of the currently logged in user, summarising several standard and custom fields that reside on the Event object. The email template has been defined in VisualForce and works when doing a merge test from the VisualForce email edit UI and I have written the Apex code below to do send the email itself.

Although the email is being sent at the right time and to the right person (which we're triggering via an AJAX call to the Apex class via a Custom Button), it is not correctly related to the Event record (its "relatedTo" object), so doesn't display any Event information.

Here's the Apex code that send the email:

global class EmailUtilities {

	WebService static boolean sendEventEmailToManager(Id eventId) {
		List<Messaging.SendEmailResult> results;
		
		// Ensure we are not going to exceed single send limits by sending this (throws System.LimitException)
		Messaging.reserveSingleEmailCapacity(1);
		
		// Retrieve the user record for this user, including their manager's user record Id
		User user = [Select Id, Name, ManagerId, Email From User Where Id = :UserInfo.getUserId()];
		
		if (user.ManagerId == null) {
			throw new ManagerNotSetException('User ' + user.Name + ' has no manager assigned in their user record.');
		}
		
		// Retrieve the template to be used
		EmailTemplate template = [SELECT id FROM EmailTemplate WHERE developerName = 'EventSummary'];
		
		// Create the message
		Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
		email.setSenderDisplayName(UserInfo.getName());
		email.setReplyTo(user.Email);
		email.setWhatId(eventId);
		email.setSaveAsActivity(false);
		email.setTargetObjectId(user.ManagerId);
		email.setTemplateId(template.Id);
	
		// Send a blind copy to the sender
		email.setBccSender(true);
		
		// Send email
		results = Messaging.sendEmail(new Messaging.SingleEmailMessage[] { email });
		
		return results.get(0).isSuccess();
	}
	
	class ManagerNotSetException extends Exception {}
}

From looking at the documentation, the WhatId cannot use an Event object, but if we can't use this, then I'm at a loss as to how an Event record to this email template within Apex! Perhaps there is no way to do it, but it seems particularly limiting if so.

Does anyone have any pointers? Thanks in advance for any help anyone is able to provide.