For members in my site, I have set a status field. The idea is that admins can login to the CMS and set a newly registered member from 'Disabled' to 'Enabled'.

What I am wanting to do is have an email be sent out to a member when their status is updated to enabled...

Admins are using the security tab in the CMS to achieve this.

How would I go about having an email fire off when an admin updates their status to 'Enabled'?

Thanks.

Just letting anyone whose interested know I came across this post: http://silverstripe.org/general-questions/show/12197

One thing I am unsure about though....

If I add an onAfterWrite function into my decorator, how do I call the Member DataObject's native onAfterWrite function first? Those examples use parent::onAfterWrite();.....but I thought it would have been $this->owner->onAfterWrite(); ?

I was able to set up something similar. When a registered user is marked 'Enabled' by an admin it emails the registered member.

I'm not sure how you are trying to do this, but inside my MediaMember.php I have a onAfterWrite() function that handles the emailing. the parent::onAfterWrite() handles everything else.

class MediaMember extends DataObjectDecorator {
...
       function onAfterWrite() {
		if($this->checkStatus == 'Disabled' && $this->owner->Status == 'Enabled') {
			if($this->selUser->inGroup('media-access')) {
				$email = new Email();
				$email->setTo($this->owner->Email);
				$email->setSubject('Account Enabled');
				$email->setFrom('no_reply@mysite.com');
				$email->setTemplate('AccessGranted');
				$email->populateTemplate($this->owner);
				$email->send();
			}
		}
		parent::onAfterWrite();
	}
}

you shouldn't have to call the member's dataObject as you are in the DataObjectDecorator which references the Member you are currently editing. $this->owner is the member's dataobject.

You don't need to call parent::onBeforeWrite() (or after) in any decorators as the actual function (onBeforeWrite) will already be the callee. You only need to explicitly call it when you're subclassing a dataobject (not decorating)

makes sense, this is good to know.

Thanks Moloko_man and also Willr, got this working :)