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本篇內容介紹了“python自定義分頁器怎么實現(xiàn)”的有關知識,在實際案例的操作過程中,不少人都會遇到這樣的困境,接下來就讓小編帶領大家學習一下如何處理這些情況吧!希望大家仔細閱讀,能夠學有所成!
封裝分頁相關數(shù)據:
:param current_page: 當前頁
:param all_count: 數(shù)據庫中的數(shù)據總條數(shù)
:param per_page_num: 每頁顯示的數(shù)據條數(shù)
:param pager_count: 最多顯示的頁碼個數(shù)
class Pagination(object): def __init__(self, current_page, all_count, per_page_num=2, pager_count=11): try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page < 1: current_page = 1 self.current_page = current_page self.all_count = all_count self.per_page_num = per_page_num # 總頁碼 all_pager, tmp = divmod(all_count, per_page_num) if tmp: all_pager += 1 self.all_pager = all_pager self.pager_count = pager_count self.pager_count_half = int((pager_count - 1) / 2) @property def start(self): return (self.current_page - 1) * self.per_page_num @property def end(self): return self.current_page * self.per_page_num def page_html(self): # 如果總頁碼 < 11個: if self.all_pager <= self.pager_count: pager_start = 1 pager_end = self.all_pager + 1 # 總頁碼 > 11 else: # 當前頁如果<=頁面上最多顯示11/2個頁碼 if self.current_page <= self.pager_count_half: pager_start = 1 pager_end = self.pager_count + 1 # 當前頁大于5 else: # 頁碼翻到最后 if (self.current_page + self.pager_count_half) > self.all_pager: pager_end = self.all_pager + 1 pager_start = self.all_pager - self.pager_count + 1 else: pager_start = self.current_page - self.pager_count_half pager_end = self.current_page + self.pager_count_half + 1 page_html_list = [] # 添加前面的nav和ul標簽 page_html_list.append(''' <nav aria-label='Page navigation' > <ul class='pagination'> ''') first_page = '<li><a href="?page=%s">首頁</a></li>' % (1) page_html_list.append(first_page) if self.current_page <= 1: prev_page = '<li class="disabled"><a href="#">上一頁</a></li>' else: prev_page = '<li><a href="?page=%s">上一頁</a></li>' % (self.current_page - 1,) page_html_list.append(prev_page) for i in range(pager_start, pager_end): if i == self.current_page: temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,) else: temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,) page_html_list.append(temp) if self.current_page >= self.all_pager: next_page = '<li class="disabled"><a href="#">下一頁</a></li>' else: next_page = '<li><a href="?page=%s">下一頁</a></li>' % (self.current_page + 1,) page_html_list.append(next_page) last_page = '<li><a href="?page=%s">尾頁</a></li>' % (self.all_pager,) page_html_list.append(last_page) # 尾部添加標簽 page_html_list.append(''' </nav> </ul> ''') return ''.join(page_html_list)
from utils.mypage import Pagination def get_book(request): book_list = models.Book.objects.all() current_page = request.GET.get("page",1) all_count = book_list.count() page_obj = Pagination(current_page=current_page,all_count=all_count,per_page_num=10) page_queryset = book_list[page_obj.start:page_obj.end] return render(request,'booklist.html',locals())
<div class="container"> <div class="row"> <div class="col-md-8 col-md-offset-2"> {% for book in page_queryset %} <p>{{ book.title }}</p> {% endfor %} {{ page_obj.page_html|safe }} </div> </div> </div>
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