Django的Paginator分页

分页实现与优化

最新推荐文章于 2023-12-12 14:38:34 发布

原创最新推荐文章于 2023-12-12 14:38:34 发布 · 261 阅读

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#django #python #前端

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该博客详细介绍了在Python中使用Paginator进行分页处理的方法，包括异常处理和前端页码显示的逻辑。通过检查输入页码的有效性，确保始终返回合法页面。同时，根据当前页的位置动态调整显示的页码范围，提供更好的用户体验。

分页一：

    page_num = request.GET.get('page', default='1')
    try:
        page = paginator.page(page_num)
        print("页面数据为：", page)
    except PageNotAnInteger:
        page = paginator.page(1)
        print('输入页数非整数', paginator.num_pages)
    except EmptyPage:
        if int(page_num) > paginator.num_pages:
            page = paginator.page(paginator.num_pages)
        elif int(page_num) < paginator.num_pages:
            page = paginator.page(1)

    page_num = int(page_num)
    # 前端页码显示设置
    if page_num <= 3:
        if paginator.num_pages <= 5:
            dis_range = range(1, paginator.num_pages + 1)
        else:
            dis_range = range(1, 5 + 1)
    else:
        if (page_num + 2) >= paginator.num_pages + 1:  # 后面加两个就超范围了要重新算
            dis_range = range(page_num - (5 - (paginator.num_pages - page_num + 1)), paginator.num_pages + 1)
        else:
            dis_range = range(page_num - 2, page_num + 2 + 1)  # 前后都没超范围直接前减2后加2保持当前页在中间
            
    return render(request, 'first.html',
                  {'paginator': paginator, 'page_size': page_size, 'page': page, 'dis_range': dis_range,
                   'search_Key': search_Key, 'search_Text': search_Text})

分页二：

# 分页
    p = Paginator(newList, 5)
    if p.num_pages <= 1:
        pageData = ''
    else:
        page = int(request.GET.get('page', 1))
        newList = p.page(page)
        left = []
        right = []
        left_has_more = False
        right_has_more = False
        first = False
        last = False
        total_pages = p.num_pages
        page_range = p.page_range
        if page == 1:
            right = page_range[page:page + 2]
            print(total_pages)
            if right[-1] < total_pages - 1:
                right_has_more = True
            if right[-1] < total_pages:
                last = True
        elif page == total_pages:
            left = page_range[(page - 3) if (page - 3) > 0 else 0:page - 1]
            if left[0] > 2:
                left_has_more = True
            if left[0] > 1:
                first = True
        else:
            left = page_range[(page - 3) if (page - 3) > 0 else 0:page - 1]
            right = page_range[page:page + 2]
            if left[0] > 2:
                left_has_more = True
            if left[0] > 1:
                first = True
            if right[-1] < total_pages - 1:
                right_has_more = True
            if right[-1] < total_pages:
                last = True
        pageData = {
            'left': left,
            'right': right,
            'left_has_more': left_has_more,
            'right_has_more': right_has_more,
            'first': first,
            'last': last,
            'total_pages': total_pages,
            'page': page,
        }

    return render(
        request, 'newList.html', {
            'active_menu': 'news',
            'sub_menu': submenu,
            'newName': newName,
            'newList': newList,
            'pageData': pageData,
        })