第八篇Django分页

1.复杂版

data = []

for i in range(1, 302):
    tmp = {"id": i, "name": "alex-{}".format(i)}
    data.append(tmp)

print(data)


def user_list(request):

    # user_list = data[0:10]
    # user_list = data[10:20]
    try:
        current_page = int(request.GET.get("page"))
    except Exception as e:
        current_page = 1

    per_page = 10

    # 数据总条数
    total_count = len(data)
    # 总页码
    total_page, more = divmod(total_count, per_page)
    if more:
        total_page += 1

    # 页面最多显示多少个页码
    max_show = 11
    half_show = int((max_show-1)/2)

    if current_page <= half_show:
        show_start = 1
        show_end = max_show
    else:
        if current_page + half_show >= total_page:
            show_start = total_page - max_show
            show_end = total_page
        else:
            show_start = current_page - half_show
            show_end = current_page + half_show

    # 数据库中获取数据
    data_start = (current_page - 1) * per_page
    data_end = current_page * per_page

    user_list = data[data_start:data_end]

    # 生成页面上显示的页码
    page_html_list = []
    # 加首页
    first_li = '<li><a href="/user_list/?page=1">首页</a></li>'
    page_html_list.append(first_li)
    # 加上一页
    if current_page == 1:
        prev_li = '<li><a href="#">上一页</a></li>'
    else:
        prev_li = '<li><a href="/user_list/?page={}">上一页</a></li>'.format(current_page - 1)
    page_html_list.append(prev_li)
    for i in range(show_start, show_end+1):
        if i == current_page:
            li_tag = '<li class="active"><a href="/user_list/?page={0}">{0}</a></li>'.format(i)
        else:
            li_tag = '<li><a href="/user_list/?page={0}">{0}</a></li>'.format(i)
        page_html_list.append(li_tag)

    # 加下一页
    if current_page == total_page:
        next_li = '<li><a href="#">下一页</a></li>'
    else:
        next_li = '<li><a href="/user_list/?page={}">下一页</a></li>'.format(current_page+1)
    page_html_list.append(next_li)

    # 加尾页
    page_end_li = '<li><a href="/user_list/?page={}">尾页</a></li>'.format(total_page)
    page_html_list.append(page_end_li)

    page_html = "".join(page_html_list)

    return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})

复杂版