How to execute custom function when I'm clicking on object in django admin?

Question

I want to create function, that will be execute every time when Admin click on this object in Django Admin. Do you have some ideas?

My function is trivial, I have just override save, but I want to execute this function without saving object:

def save(self, *args, **kwargs):
        if self.corp_goal:
            print('We have corporate goal!')
            for i in self.corp_goal.all():
                if i.corp_factor_rate:
                    print('we have rated goal!')
                    print('Corporate goal {} : factor {}'.format(i.corp_goal_title, i.corp_factor_rate * i.corp_factor_weight))
                else:
                    print('we dont have rated goal')
        else:
            print('we dont have asigned goals')