django 分頁處理
阿新 • • 發佈：2019-01-23
import re from django.core.paginator import Paginator, InvalidPage from django.db.models.query import QuerySet from django.utils.translation import ugettext_lazy as _ import math
class Page(object): def __init__(self, queryset, request=None, pageno=1, paginate_by=20, urlprefix=None,urlnames=urlnames): ifisinstance(queryset, QuerySet): self.queryset = queryset else: self.queryset = QuerysetWrapper(queryset) self.paginate_by = paginate_by self.request = request if urlprefix == None and request: newurl = re.sub(r'page=\d*', '', self.request.get_full_path()) self.urlprefix = newurl else: self.urlprefix = urlprefix self.urlname = urlnames self.pageno = pageno paginator = Paginator(self.queryset, paginate_by) lastpage = math.ceil(1.0*paginator.count/paginate_by) if self.request and notpageno: try: page = self.request.GET['page'] except: try: page = self.request.POST.get('page','1') except: page = self.pageno else: page = self.pageno try: if isinstance(page, str): if not page.isdigit(): page = 'last' page = lastpage page = int(page) if page > lastpage: page = lastpage object_list = paginator.page(page).object_list except (InvalidPage, ValueError): object_list = [] self.is_paginated = paginator.count > 1 self.results_per_page = paginate_by try: self.has_next = paginator.page(page).has_next() self.has_previous = paginator.page(page).has_previous() except: self.has_next = False self.has_previous = False self.page = page self.next = page + 1 self.previous = page - 1 self.pages = paginator.count self.hits = paginator.num_pages self.object_list = object_list def next_url(self): if self.has_next: return '<a href="%spage=%d">%s</a>' % (self.fix_url(self.urlprefix), self.next, self.urlname['next']) return '' def previous_url(self): if self.has_previous: return '<a href="%spage=%d">%s</a>' % (self.fix_url(self.urlprefix), self.previous, self.urlname['previous']) else: return '' def first_url(self): if self.pages > 1: return '<a href="%spage=1">%s</a>' % (self.fix_url(self.urlprefix), self.urlname['first']) else: return '' def last_url(self): if self.pages > 1: return '<a href="%spage=%d">%s</a>' % (self.fix_url(self.urlprefix), self.pages, self.urlname['last']) else: return '' def fix_url(self, url): if url.find('?') == -1: url = url + '?' else: if not url.endswith('&') and not url.endswith('?'): url = url + '&' return url def page_url(self): """ create page link url exmple: <div><a href="group?page=2">2</a></div> """ start_num = 1 end_num = 1 page_url = u'' page_pre = u'' page_last = u'' #總頁數小於等於顯示分頁數 if self.hits <= 10: end_num = self.hits if self.hits > 10: if self.page-8 >=0: page_pre = u'<a href="%(href)spage=1">1</a><a href="%(href)spage=2">2</a>...' % {'href':self.fix_url(self.urlprefix)} start_num = self.page - 3 if self.page+6 <= self.hits: page_last = u'..<a href="%(href)spage=%(self.page_pre)d">%(self.page_pre)d</a><a href="%(href)spage=%(self.page)d">%(self.page)d</a>' % {'href':self.fix_url(self.urlprefix),'self.page_pre':self.hits-1,'self.page':self.hits} if page_pre: end_num = self.page + 3 else: end_num = 8 else: end_num = self.hits #start_num = self.page - 8 page_url += page_pre for n in range(start_num, end_num+1): if n == self.page: page_url += u'<a href="%(href)spage=%(self.page)d" class="current">%(self.page)d</a>' % {'href':self.fix_url(self.urlprefix),'self.page':n} else: page_url += u'<a href="%(href)spage=%(self.page)d">%(self.page)d</a>' % {'href':self.fix_url(self.urlprefix),'self.page':n} #設定上一頁 if self.page >1: page_url = u'<a href="%(href)spage=%(self.page)d">上一頁</a>' % {'href':self.fix_url(self.urlprefix),'self.page':self.page-1} + page_url if self.page < self.hits: page_last += u'<a href="%(href)spage=%(self.page)d">下一頁</a>' % {'href':self.fix_url(self.urlprefix),'self.page':self.page+1} page_url = u'<div class=page_list>'+ page_url + page_last + '</div>' if self.hits <=1: return '' return page_url def english_page_url(self): """ create page link url exmple: <div><a href="group?page=2">2</a></div> """ start_num = 1 end_num = 1 page_url = u'' page_pre = u'' page_last = u'' #總頁數小於等於顯示分頁數 if self.hits <= 10: end_num = self.hits if self.hits > 10: if self.page-8 >=0: page_pre = u'<li><a href="%(href)spage=1">1</a></li><li><a href="%(href)spage=2">2</a></li><li>...</li>' % {'href':self.fix_url(self.urlprefix)} start_num = self.page - 3 if self.page+6 <= self.hits: page_last = u'<li>...</li><li><a href="%(href)spage=%(self.page_pre)d">%(self.page_pre)d</a></li><li><a href="%(href)spage=%(self.page)d">%(self.page)d</a></li>' % {'href':self.fix_url(self.urlprefix),'self.page_pre':self.hits-1,'self.page':self.hits} if page_pre: end_num = self.page + 3 else: end_num = 8 else: end_num = self.hits #start_num = self.page - 8 page_url += page_pre for n in range(start_num, end_num+1): if n == self.page: page_url += u'<li class=on><a href="%(href)spage=%(self.page)d">%(self.page)d</a></li>' % {'href':self.fix_url(self.urlprefix),'self.page':n} else: page_url += u'<li><a href="%(href)spage=%(self.page)d">%(self.page)d</a></li>' % {'href':self.fix_url(self.urlprefix),'self.page':n} #設定上一頁 if self.page >1: page_url = u'<li ><a href="%(href)spage=%(self.page)d">Prev</a></li>' % {'href':self.fix_url(self.urlprefix),'self.page':self.page-1} + page_url if self.page < self.hits: page_last += u'<li ><a href="%(href)spage=%(self.page)d">Next</a></li>' % {'href':self.fix_url(self.urlprefix),'self.page':self.page+1} page_url = u'<div class="jx_page1"><ul>'+ page_url + page_last + '</ul></div>' if self.hits <=1: return '' return page_url def english_page_ajax_url(self,action='list'): """ create page link url exmple: <div><a href="group?page=2">2</a></div> """ start_num = 1 end_num = 1 page_url = u'' page_pre = u'' page_last = u'' #總頁數小於等於顯示分頁數 if self.hits <= 10: end_num = self.hits if self.hits > 10: if self.page-8 >=0: page_pre = u'<li><a onclick="go(\'%(action)s\',1)" href="javascript:void(0)">1</a></li><li><a onclick="go(\'%(action)s\',2)" href="javascript:void(0)">2</a></li><li>...</li>' % {'action':action} start_num = self.page - 3 if self.page+6 <= self.hits: page_last = u'<li>...</li><li><a onclick="go(\'%(action)s\',%(self.page_pre)d)" href="javascript:void(0)">%(self.page_pre)d</a></li><li><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">%(self.page)d</a></li>' % {'action':action,'self.page_pre':self.hits-1,'self.page':self.hits} if page_pre: end_num = self.page + 3 else: end_num = 8 else: end_num = self.hits #start_num = self.page - 8 page_url += page_pre for n in range(start_num, end_num+1): if n == self.page: page_url += u'<li class="on"><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">%(self.page)d</a></li>' % {'action':action,'self.page':n} else: page_url += u'<li><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">%(self.page)d</a></li>' % {'action':action,'self.page':n} #設定上一頁 if self.page >1: page_url = u'<li><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">Prev</a></li>' % {'action':action,'self.page':self.page-1} + page_url if self.page < self.hits: page_last += u'<li><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">Next</a></li>' % {'action':action,'self.page':self.page+1} page_url = u'<div class="jx_page1"><ul>'+ page_url + page_last + '</ul></div>' if self.hits <=1: return '' return page_url def page_ajax_url(self, action='list'): """ create page link url exmple: <div><a href="group?page=2">2</a></div> <a onclick="go(\'%(action)s\',3)" href="javascript:void(0)">3</a> """ start_num = 1 end_num = 1 page_url = u'' page_pre = u'' page_last = u'' #總頁數小於等於顯示分頁數 if self.hits <= 10: end_num = self.hits if self.hits > 10: if self.page-8 >=0: page_pre = u'<a onclick="go(\'%(action)s\',1)" href="javascript:void(0)">1</a><a onclick="go(\'%(action)s\',2)" href="javascript:void(0)">2</a>...' % {'action':action} start_num = self.page - 3 if self.page+6 <= self.hits: page_last = u'..<a onclick="go(\'%(action)s\',%(self.page_pre)d)" href="javascript:void(0)">%(self.page_pre)d</a><a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">%(self.page)d</a>' % {'action':action,'self.page_pre':self.hits-1,'self.page':self.hits} if page_pre: end_num = self.page + 3 else: end_num = 8 else: end_num = self.hits #start_num = self.page - 8 page_url += page_pre for n in range(start_num, int(end_num)+1): if n == self.page: page_url += u'<a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)" class="current">%(self.page)d</a>' % {'action':action,'self.page':n} else: page_url += u'<a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">%(self.page)d</a>' % {'action':action,'self.page':n} # 設定上一頁 if self.page >1: page_url = u'<a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">上一頁</a>' % {'action':action,'self.page':self.page-1} + page_url if self.page < self.hits: page_last += u'<a onclick="go(\'%(action)s\',%(self.page)d)" href="javascript:void(0)">下一頁</a>' % {'action':action,'self.page':self.page+1} page_url = u'<div class=page_list>'+ page_url + page_last + '</div>' if self.hits <=1: return '' return page_url