views.py 文件源码

def get_queryset(self):
        """
        Returns a queryset used for autocompletion, restricted based
        on the user input.
        """
        # Only let logged in users access all the course information
        if not self.request.user.is_authenticated():
            return Course.objects.none()

        qs = Course.objects.all()

        # If the user has started entering input, start restricting
        # the choices available for autocompletion.
        if self.q:
            course_code = Q(course_code__istartswith=self.q)
            full_name = Q(full_name__istartswith=self.q)
            display_name = Q(display_name__startswith=self.q)
            qs = qs.filter(course_code | full_name | display_name)

        return qs