From the implementation here
the method changes_on_update only considers onupdate keyword for a column and not server_onupdate which should be (in my understanding) an incomplete implementation.
For more information on server_onupdate, follow this link.
From the implementation here the method changes_on_update only considers onupdate keyword for a column and not server_onupdate which should be (in my understanding) an incomplete implementation.
For more information on server_onupdate, follow this link.