16-类视图

参考官方文档：https://docs.djangoproject.com/en/2.2/topics/class-based-views/intro/

# 对象的通用视图
class StudentListView(ListView):
    setion =  '学生列表'
    model = Student    #  获得数据库
    template_name = 'teacher/student_list.html'   # 重定义
    context_object_name = 'students'       # 数据重名字，没有HTML这个用object_list获取
    # paginate_by = 10
    def get_context_data(self,**kwargs):
        context = super().get_context_data(**kwargs)    # 继承父类
        context['setion'] = self.setion      # 上下文管理
        context['q'] = self.request.GET.get('q')
        context['total_sum'] = context['page_obj'].paginator.count    # 获得总页数
        context['per_page'] = self.request.GET.get('per_page',10)     
        context['page'] = self.request.GET.get('page',1)
        return context

    def get_queryset(self):     # 动态加载
        student = Student.objects.filter(is_delete=False)  # 定义过滤的对象列表
        q = self.request.GET.get('q')
        per_page = self.request.GET.get('per_page',10)
        self.paginate_by = per_page
        if q:
            if q.isdigit():
                student = Student.objects.filter(phone=q)
            else:
                student = Student.objects.filter(name=q)
        return student