def get_exclude(self, request, obj=None):
    if (obj is None):
        return ('user',)
    else:
        return super(BaseUpdateAdmin, self).get_exclude(request, obj)
def get_exclude(self, request, obj=None):
    if (obj is None):
        return ('user',)
    else:
        return super(BaseUpdateAdmin, self).get_exclude(request, obj)