6-Django项目--分页模块化封装参数共存

devtools/2024/12/23 0:41:46/

目录

utils/page_data.py

分页模块化封装

python%20package-toc" style="margin-left:80px;">在app当中创建一个python package

在当前包里面创建py文件

参数共存

完整代码

utils/page_data.py

--包里创建py文件.

python"># -*- coding:utf-8 -*-
from django.utils.safestring import mark_safe
from copy import deepcopyclass PageData(object):def __init__(self, request, queryset, page_size=10, plus=2, page_param="page"):"""request: 请求queryset：数据表查询的结果page_size：每页展示多少条数据plus：当前页，前后各展示多少个页码"""get_query_dict = deepcopy(request.GET)self.query_dict = get_query_dictself.page_param = page_param# 分页page = request.GET.get(page_param, "1")  # 当前所在的页面# 判断字符创当中全部都是数字if page.isdecimal():page = int(page)else:page = 1self.page = pageself.start = (page - 1) * page_sizeself.end = page * page_size# 分页操作self.page_queryset = queryset[self.start: self.end]page_count = queryset.count()page_count, div = divmod(page_count, page_size)if div:page_count += 1self.page_count = page_countself.plus = plusdef page_html(self):if self.page_count <= 2 * self.plus + 1:start_page = 1end_page = self.page_countelse:# 当前选中的页数小于等于三if self.page <= self.plus:start_page = 1end_page = 2 * self.plus + 1else:# 当前页 + 2if (self.page + self.plus) > self.page_count:start_page = self.page_count - self.plus * 2end_page = self.page_countelse:start_page = self.page - self.plusend_page = self.page + self.pluspage_str_list = []# 首页self.query_dict.setlist(self.page_param, [1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">首页</span></a></li>')# 上一页if self.page > 1:self.query_dict.setlist(self.page_param, [self.page-1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')for page_num in range(start_page, end_page + 1):if page_num == self.page:self.query_dict.setlist(self.page_param, [page_num])page_ele = f'<li class="active"><a href="?{self.query_dict.urlencode()}">{page_num}</a></li>'else:self.query_dict.setlist(self.page_param, [page_num])page_ele = f'<li><a href="?{self.query_dict.urlencode()}">{page_num}</a></li>'page_str_list.append(page_ele)# 下一页if self.page < self.page_count:self.query_dict.setlist(self.page_param, [self.page + 1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Next"><span aria-hidden="true">»</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Next"><span aria-hidden="true">»</span></a></li>')# 尾页self.query_dict.setlist(self.page_param, [self.page_count])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">尾页</span></a></li>')# 将列表当中的字符串传递给html，并且一标签的形式展示search_page = """<li><form method="get" style="float: left;margin-left: 1px"><input type="text" class="form-control" placeholder="页码" name="page" style="position: relative;display: inline-block;width: 75px"><button class="btn btn-success btn-sm" type="submit">跳转</button></form></li>"""page_str_list.append(search_page)page_string = mark_safe("".join(page_str_list))return page_string

分页模块化封装

  • python%20package" style="background-color:transparent;">在app当中创建一个python package

  • 在当前包里面创建py文件

    # -*- coding:utf-8 -*-
from django.utils.safestring import mark_safe
from copy import deepcopy
​
class PageData(object):def __init__(self, request, queryset, page_size=10, plus=2, page_param="page"):"""request: 请求queryset：数据表查询的结果page_size：每页展示多少条数据plus：当前页，前后各展示多少个页码"""get_query_dict = deepcopy(request.GET)self.query_dict = get_query_dictself.page_param = page_param# 分页page = request.GET.get(page_param, "1")  # 当前所在的页面# 判断字符创当中全部都是数字if page.isdecimal():page = int(page)else:page = 1
​self.page = pageself.start = (page - 1) * page_sizeself.end = page * page_size# 分页操作self.page_queryset = queryset[self.start: self.end]page_count = queryset.count()page_count, div = divmod(page_count, page_size)if div:page_count += 1self.page_count = page_countself.plus = plus
​def page_html(self):if self.page_count <= 2 * self.plus + 1:start_page = 1end_page = self.page_countelse:# 当前选中的页数小于等于三if self.page <= self.plus:start_page = 1end_page = 2 * self.plus + 1else:# 当前页 + 2if (self.page + self.plus) > self.page_count:start_page = self.page_count - self.plus * 2end_page = self.page_countelse:start_page = self.page - self.plusend_page = self.page + self.plus
​page_str_list = []# 首页page_str_list.append(f'<li><a href="?page=1" aria-label="Previous"><span aria-hidden="true">首页</span></a></li>')
​# 上一页if self.page > 1:page_str_list.append(f'<li><a href="?page={self.page - 1}" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')
​for page_num in range(start_page, end_page + 1):if page_num == self.page:page_ele = f'<li class="active"><a href="?page={page_num}">{page_num}</a></li>'else:page_ele = f'<li><a href="?page={page_num}">{page_num}</a></li>'page_str_list.append(page_ele)# 下一页if self.page < self.page_count:page_str_list.append(f'<li><a href="?page={self.page + 1}" aria-label="Next"><span aria-hidden="true">»</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Next"><span aria-hidden="true">»</span></a></li>')
​# 尾页page_str_list.append(f'<li><a href="?page={self.page_count}" aria-label="Previous"><span aria-hidden="true">尾页</span></a></li>')# 将列表当中的字符串传递给html，并且一标签的形式展示search_page = """<li><form method="get" style="float: left;margin-left: 1px"><input type="text" class="form-control" placeholder="页码" name="page" style="position: relative;display: inline-block;width: 75px"><button class="btn btn-success btn-sm" type="submit">跳转</button></form></li>"""page_str_list.append(search_page)page_string = mark_safe("".join(page_str_list))return page_string

 

参数共存

  • 在做搜索的过程当中，翻页的时候，搜索的条件还在

    在翻页的时候，始终展示搜索出来满足条件的数据

    get_query_dict = deepcopy(request.GET)# 在get请求当中，固定存放一个page，有其他参数，不会被替换get_query_dict.setlist("page", [1])# 将两个参数使用&符号拼接起来# ?page=1&search=100print(get_query_dict.urlencode())
    # 搜索的时候，出现的参数http://127.0.0.1:8000/asset/data/?search=100
# 做翻页的时候，搜索参数还在http://127.0.0.1:8000/asset/data/?search=100&page=3

--无论怎么搜索,查找,都只显示一个参数. 

  • 完整代码

    # -*- coding:utf-8 -*-
from django.utils.safestring import mark_safe
from copy import deepcopy
​
class PageData(object):def __init__(self, request, queryset, page_size=10, plus=2, page_param="page"):"""request: 请求queryset：数据表查询的结果page_size：每页展示多少条数据plus：当前页，前后各展示多少个页码"""get_query_dict = deepcopy(request.GET)self.query_dict = get_query_dictself.page_param = page_param# 分页page = request.GET.get(page_param, "1")  # 当前所在的页面# 判断字符创当中全部都是数字if page.isdecimal():page = int(page)else:page = 1
​self.page = pageself.start = (page - 1) * page_sizeself.end = page * page_size# 分页操作self.page_queryset = queryset[self.start: self.end]page_count = queryset.count()page_count, div = divmod(page_count, page_size)if div:page_count += 1self.page_count = page_countself.plus = plus
​def page_html(self):if self.page_count <= 2 * self.plus + 1:start_page = 1end_page = self.page_countelse:# 当前选中的页数小于等于三if self.page <= self.plus:start_page = 1end_page = 2 * self.plus + 1else:# 当前页 + 2if (self.page + self.plus) > self.page_count:start_page = self.page_count - self.plus * 2end_page = self.page_countelse:start_page = self.page - self.plusend_page = self.page + self.plus
​page_str_list = []# 首页self.query_dict.setlist(self.page_param, [1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">首页</span></a></li>')
​# 上一页if self.page > 1:self.query_dict.setlist(self.page_param, [self.page-1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')
​for page_num in range(start_page, end_page + 1):if page_num == self.page:self.query_dict.setlist(self.page_param, [page_num])page_ele = f'<li class="active"><a href="?{self.query_dict.urlencode()}">{page_num}</a></li>'else:self.query_dict.setlist(self.page_param, [page_num])page_ele = f'<li><a href="?{self.query_dict.urlencode()}">{page_num}</a></li>'page_str_list.append(page_ele)# 下一页if self.page < self.page_count:self.query_dict.setlist(self.page_param, [self.page + 1])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Next"><span aria-hidden="true">»</span></a></li>')else:page_str_list.append(f'<li class="disabled"><a href="#" aria-label="Next"><span aria-hidden="true">»</span></a></li>')
​# 尾页self.query_dict.setlist(self.page_param, [self.page_count])page_str_list.append(f'<li><a href="?{self.query_dict.urlencode()}" aria-label="Previous"><span aria-hidden="true">尾页</span></a></li>')# 将列表当中的字符串传递给html，并且一标签的形式展示search_page = """<li><form method="get" style="float: left;margin-left: 1px"><input type="text" class="form-control" placeholder="页码" name="page" style="position: relative;display: inline-block;width: 75px"><button class="btn btn-success btn-sm" type="submit">跳转</button></form></li>"""page_str_list.append(search_page)page_string = mark_safe("".join(page_str_list))return page_string


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