Subscribe to field specific page update event

Questions
1

Hi,

I need to watch for when opening hours are updated and send out an e-mail after that happens. Opening hours is a page specific field. Looking at the field from the event data when subscribing to a PageUpdated event, there seems to be no way of utilizing it since the field is already updated at that point so I can’t even to a comparison between the old value and the new. Is there any other way of accomplishing this?

Litium version: 7.7.9

2

A solution could be to add a hidden field that you compare with openinghours. if they are different you consider value changed, update the hidden field and send notification.