本文实例为大家分享了Django自定义分页的具体代码,供大家参考,具体内容如下
稳扎稳打版
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def book(request): # 从URL取参数(访问的页码) page_num = request.GET.get( "page" ) try : # 将取出的page转换为int类型 page_num = int(page_num) except Exception as e: # 当输入的页码不是正经数字的时候 默认返回第一页的数据 page_num = 1 # 数据库总数据是多少条 total_count = models.Book.objects.all(). count () # 每一页显示多少条数据 per_page = 10 # 总共需要多少页码来展示 total_page, m = divmod(total_count, per_page) if m: total_page += 1 # 如果输入的页码数超过了最大的页码数,默认返回最后一页 if page_num > total_page: page_num = total_page # 定义两个变量从哪里开始到哪里结束 data_start = (page_num - 1) * 10 data_end = page_num * 10 # 页面上总共展示多少页码 max_page = 11 if total_page < max_page: max_page = total_page # 把从URL中获取的page_num 当做是显示页面的中间值, 那么展示的便是当前page_num 的前五页和后后五页 half_max_page = max_page // 2 # 根据展示的总页码算出页面上展示的页码从哪儿开始 page_start = page_num - half_max_page # 根据展示的总页码算出页面上展示的页码到哪儿结束 page_end = page_num + half_max_page # 如果当前页减一半 比1还小, 不然页面上会显示负数的页码 if page_start <= 1: page_start = 1 page_end = max_page # 如果 当前页 加 一半 比总页码数还大, 不然页面上会显示比总页码还大的多余页码 if page_end >= total_page: page_end = total_page page_start = total_page - max_page + 1 # 从数据库取值, 并按照起始数据到结束数据展示 all_book = models.Book.objects.all()[data_start:data_end] # 自己拼接分页的HTML代码 html_str_list = [] # # 加上首页 html_str_list.append( '<li><a href="/book/?page=1" rel="external nofollow" >首页</a></li>' ) # 断一下 如果是第一页,就没有上一页 if page_num <= 1: html_str_list.append( '<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">«</span></a></li>' ) else : # 不是第一页,就加一个上一页的标签 html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">«</span></a></li>' .format(page_num - 1)) for i in range(page_start, page_end + 1): # 如果是当前页就加一个active样式类 if i == page_num: tmp = '<li class="active"><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>' .format(i) else : tmp = '<li><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>' .format(i) html_str_list.append(tmp) # 判断,如果是最后一页,就没有下一页 if page_num >= total_page: html_str_list.append( '<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">»</span></a></li>' ) else : # 不是最后一页, 就加一个下一页标签 html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">»</span></a></li>' .format(page_num + 1)) # 加上尾页 html_str_list.append( '<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>' .format(total_page)) page_html = "" .join(html_str_list) return render(request, "book.html" , { "all_book" :all_book, "page_html" :page_html}) |
book.html
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < title >书籍列表</ title > < link rel = "stylesheet" href = "/static/bootstrap/css/bootstrap.min.css" > </ head > < body > < div class = "container" > < table class = "table table-bordered" > < thead > < tr > < th >序列号</ th > < th >ID值</ th > < th >书名</ th > < th >时间</ th > </ tr > {% for book in all_book %} < tr > < td >{{ forloop.counter }}</ td > < td >{{ book.id }}</ td > < td >{{ book.name }}</ td > < td >{{ book.date }}</ td > </ tr > {% endfor %} </ thead > </ table > < nav aria-label = "Page navigation" > < ul class = "pagination" > {{ page_html|safe }} </ ul > </ nav > </ div > </ body > </ html > |
封装保存版
封装保存版
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class Page(object): def __init__(self, page_num, total_count, url_prefix, per_page=10, max_page=11): "" " :param page_num: 当前页码数 :param total_count: 数据总数 :param url_prefix: a标签href的前缀 :param per_page: 每页显示多少条数据 :param max_page: 页面上最多显示几个页码 "" " self.url_prefix = url_prefix self.max_page = max_page # 总共需要多少页码来展示 total_page, m = divmod(total_count, per_page) if m: total_page += 1 self.total_page = total_page try : # 将取出的page转换为int类型 page_num = int(page_num) except Exception as e: # 当输入的页码不是正经数字的时候 默认返回第一页的数据 page_num = 1 # 如果输入的页码数超过了最大的页码数,默认返回最后一页 if page_num > total_page: page_num = total_page self.page_num = page_num # 定义两个变量保存数据从哪儿取到哪儿 self.data_start = (page_num - 1) * 10 self.data_end = page_num * 10 # 页面上总共展示多少页码 if total_page < self.max_page: self.max_page = total_page half_max_page = self.max_page // 2 # 页面上展示的页码从哪儿开始 page_start = page_num - half_max_page # 页面上展示的页码到哪儿结束 page_end = page_num + half_max_page # 如果当前页减一半 比1还小, 不然页面上会显示负数的页码 if page_start <= 1: page_start = 1 page_end = self.max_page # 如果 当前页 加 一半 比总页码数还大, 不然页面上会显示比总页码还大的多余页码 if page_end >= total_page: page_end = total_page page_start = total_page - self.max_page + 1 self.page_start = page_start self.page_end = page_end @property def start(self): return self.data_start @property def end (self): return self.data_end def page_html(self): # 自己拼接分页的HTML代码 html_str_list = [] # # 加上首页 html_str_list.append( '<li><a href="{}?page=1">首页</a></li>' .format(self.url_prefix)) # 断一下 如果是第一页,就没有上一页 if self.page_num <= 1: html_str_list.append( '<li class="disabled"><a href="#"><span aria-hidden="true">«</span></a></li>' ) else : # 不是第一页,就加一个上一页的标签 html_str_list.append( '<li><a href="{}?page={}"><span aria-hidden="true">«</span></a></li>' .format(self.url_prefix, self.page_num - 1)) for i in range(self.page_start, self.page_end + 1): # 如果是当前页就加一个active样式类 if i == self.page_num: tmp = '<li class="active"><a href="{0}?page={1}">{1}</a></li>' .format(self.url_prefix, i) else : tmp = '<li><a href="{0}?page={1}">{1}</a></li>' .format(self.url_prefix, i) html_str_list.append(tmp) # 判断,如果是最后一页,就没有下一页 if self.page_num >= self.total_page: html_str_list.append( '<li class="disabled"><a href="#"><span aria-hidden="true">»</span></a></li>' ) else : # 不是最后一页, 就加一个下一页标签 html_str_list.append( '<li><a href="{}?page={}"><span aria-hidden="true">»</span></a></li>' .format(self.url_prefix, self.page_num + 1)) # 加上尾页 html_str_list.append( '<li><a href="{}?page={}">尾页</a></li>' .format(self.url_prefix, self.total_page)) page_html = "" .join(html_str_list) return page_html |
封装版使用指南
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def publisher(request): page_num = request.GET.get( "page" ) total_count = models.Publisher.objects.all(). count () # 调用封装的Page类,传入相应的参数 page_obj = Page(page_num, total_count, url_prefix= "/publisher/" , per_page=10, max_page=11) all_publisher = models.Publisher.objects.all()[page_obj.start:page_obj. end ] page_html = page_obj.page_html() return render(request, "publisher.html" , { "publisher" : all_publisher, "page_html" : page_html}) |
封装版对应的HTML参考
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < title >图书列表</ title > < link rel = "stylesheet" href = "/static/bootstrap/css/bootstrap.min.css" > </ head > < body > < div class = "container" > < table class = "table table-bordered" > < thead > < tr > < td >序列号</ td > < td >ID值</ td > < td >出版社</ td > < td >时间</ td > </ tr > </ thead > < tbody > {% for pub in publisher %} < tr > < th >{{ forloop.counter }}</ th > < th >{{ pub.id }}</ th > < th >{{ pub.name }}</ th > < th >{{ pub.date }}</ th > </ tr > {% endfor %} </ tbody > </ table > < nav aria-label = "Page navigation" > < ul class = "pagination" > {{ page_html|safe }} </ ul > </ nav > </ div > </ body > </ html > |
效果图如下:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/yanjieli/archive/2018/09/24/9507272.html