Django中封装分页组件

(1) 定义Paginator类

from django.utils.safestring import mark_safe


class Paginator(object):
    \"\"\"
    初始化参数说明：
    request：请求对象
    data：查询到的符合条件的数据
    search_data：搜索框收索的关键字，解决收索情况下分页的BUG
    page_parm：分页请求的参数名称，例如：http://127.0.0.1:8000/phonenum/list/?page=2&q=
    page_size：每页显示的数据量
    plus：当前页分页按钮的两边显示的按钮数量
    \"\"\"

    def __init__(self, request, data, search_data, page_parm=\"page\", page_size=15, plus=5):

        page = request.GET.get(page_parm, \"\")
        if page.isdecimal():
            page = int(page)
        else:
            page = 1
        self.page = page
        self.page_size = page_size
        self.start = (page - 1) * page_size
        self.end = page * page_size
        self.data = data[self.start:self.end]
        total_count = data.count()
        total_page_count, div = divmod(total_count, page_size)
        if div:
            total_page_count += 1
        self.total_page_count = total_page_count
        self.plus = plus
        self.search_data = search_data
        self.page_parm = page_parm

    # 生成html标签
    def Html(self):
        if self.total_page_count <= 2 * self.plus + 1:
            start_page = 1
            end_page = self.total_page_count
        else:
            if self.page < self.plus:
                start_page = 1
                end_page = 2 * self.plus
            else:
                if (self.page + self.plus) > self.total_page_count:
                    start_page = self.total_page_count - 2 * self.plus
                    end_page = self.total_page_count
                else:
                    start_page = self.page - self.plus
                    end_page = self.page + self.plus
        # 分页按钮
        page_str_list = []
        # 首页
        first_page = \'<li><a href=\"?{}={}&q={}\">首页</a></li>\'.format(self.page_parm, 1, self.search_data)
        page_str_list.append(first_page)
        # 上一页
        if self.page > 1:
            pre = \'<li><a href=\"?{}={}&q={}\">上一页</a></li>\'.format(self.page_parm, self.page - 1, self.search_data)
        else:
            pre = \'<li><a href=\"?{}={}&q={}\">上一页</a></li>\'.format(self.page_parm, 1, self.search_data)
        page_str_list.append(pre)

        for i in range(start_page, end_page + 1):
            if i == self.page:
                ele = \'<li class=\"active\"><a href=\"?{}={}&q={}\">{}</a></li>\'.format(self.page_parm, i, self.search_data,
                                                                                    i)
            else:
                ele = \'<li><a href=\"?{}={}&q={}\">{}</a></li>\'.format(self.page_parm, i, self.search_data, i)
            page_str_list.append(ele)
        # 下一页
        if self.page < self.total_page_count:
            next = \'<li><a href=\"?{}={}&q={}\">下一页</a></li>\'.format(self.page_parm, self.page + 1, self.search_data)
        else:
            next = \'<li><a href=\"?{}={}&q={}\">下一页</a></li>\'.format(self.page_parm, self.total_page_count,
                                                                   self.search_data)
        page_str_list.append(next)
        # 尾页
        last_page = \'<li><a href=\"?{}={}&q={}\">尾页</a></li>\'.format(self.page_parm, self.total_page_count,
                                                                   self.search_data)
        page_str_list.append(last_page)
        search_string = \"\"\"
                        <div style=\"width: 150px;margin-bottom: 20px;display: inline-block\">
                            <form method=\"get\">
                                <div class=\"input-group\">
                                    <input type=\"text\" class=\"form-control\" placeholder=\"请输入页码\" name=\"{}\">
                                    <span class=\"input-group-btn\">
                                        <button class=\"btn btn-primary\" type=\"submit\">跳转</button>
                                    </span>
                                </div>
                            </form>
                        </div>
                        \"\"\".format(self.page_parm)
        page_str_list.append(search_string)
        page_string = mark_safe(\"\".join(page_str_list))
        return page_string

(2) 导入Paginator类，传入参数如下所示

 def phoneNum_list(request):
    \"\"\"靓号列表\"\"\"
    data_dict={}
    search_data=request.GET.get(\"q\",\"\")
    if search_data:
        data_dict[\"phone_num__contains\"]=search_data
    # 分页
    data = PrettyPhoneNum.objects.filter(**data_dict).order_by(\"level\")
    page_object=Paginator(request,data,search_data) # 其他三个参数根据需求调整
    context={
        \"data\": page_object.data,
        \"search_data\": search_data,
        \"page_string\": page_object.Html()
    }
    return render(request,\"phonenum_list.html\",context)

data为查询到的分页后的数据，search_data为收索的关键字，返回用于搜索框保留上次搜索的内容，page_string为分页按钮

(3) 在前端显示分页按钮

<nav aria-label=\"...\">
     <ul class=\"pagination\">
          {{ page_string }}
     </ul>
</nav>

来源：https://www.cnblogs.com/minqiliang/p/16579980.html
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