When I upgrade a custom module in openerp, it seems like the 'Upgrade Module' button would be the answer. But it looks like it doesn't do what I want. The only way to get my server to reload the models and update the database structure is to restart the server. Is this correct? I could see this being required since you don't want to accidentally have users interacting with the system while you are doing an upgrade to the database structure. On the other hand, if you could do an 'offline' mode like Drupal, that would be nicer.