Odoo 8 - how to get field values of current active id or current model

Question

How to access the fields of current form view if it is not yet save or in editing mode?

I tried getting the current active id but I cant get it. In my .py

@api.one
def _check_butcher(self):
    prod_id = self.env.context.get('active_id')
    # logging.info("TEST \n TEST %s" % prod_id.can_butcher)
    logging.info("TEST \n TEST %s" % prod_id)
    return prod_id

In the terminal, it is printed None

Answer 1

I dont work with version 8 so my answer propably won't be most accurate but i think you should look for CRUD in this Documentation https://www.odoo.com/documentation/8.0/ for "default_get()"