django分页页面中的不同记录数量
django分页页面中的不同记录数量
提问于 2021-03-25 20:58:32
我试图用不同的东西来分页，以最大化元素，在第一页(5)和所有其他页面(最多6)。我喜欢这个answer
class MyPaginator(Paginator):
def __init__(self, **kw):
self.deltafirst = kw.pop('deltafirst', 0)
Paginator.__init__(self, **kw)
def page(self, number):
number = self.validate_number(number)
if number == 1:
bottom = 0
top = self.per_page - self.deltafirst
else:
bottom = (number - 1) * self.per_page - self.deltafirst
top = bottom + self.per_page
if top + self.orphans >= self.count:
top = self.count
return Page(self.object_list[bottom:top], number, self)
from django.core.paginator import Paginator
from django.core.paginator import EmptyPage
from django.core.paginator import PageNotAnInteger
class NewsView(ListView):
model = News
template_name="mysite/news.html"
paginate_by = 5
def get_context_data(self, **kwargs):
context = super(NewsView, self).get_context_data(**kwargs)
all_news = News.objects.all().order_by("-date_news")
paginator = MyPaginator(all_news, self.paginate_by,deltafirst=1)
page = self.request.GET.get('page')
try:
file_exams = paginator.page(page)
except PageNotAnInteger:
file_exams = paginator.page(1)
except EmptyPage:
file_exams = paginator.page(paginator.num_pages)
context['all_news'] = file_exams
return context但是我得到了一个错误，我不知道我做错了什么。错误本身
paginator = MyPaginator(all_news, self.paginate_by,deltafirst=1)
TypeError: __init__() takes 1 positional argument but 3 were given回答 1
Stack Overflow用户
回答已采纳
发布于 2021-03-25 21:15:28
首先在MyPaginator中更改您的__init__方法以修复错误：
from math import ceil
class MyPaginator(Paginator):
def __init__(self, *args, **kw):
self.deltafirst = kw.pop('deltafirst', 0)
super().__init__(*args, **kw)
def page(self, number):
number = self.validate_number(number)
if number == 1:
bottom = 0
top = self.per_page - self.deltafirst
else:
bottom = (number - 1) * self.per_page - self.deltafirst
top = bottom + self.per_page
if top + self.orphans >= self.count:
top = self.count
return Page(self.object_list[bottom:top], number, self)
@property
def num_pages(self):
if self.count == 0 and not self.allow_empty_first_page:
return 0
count = max(self.count - self.per_page + self.deltafirst, 0)
hits = max(0, count - self.orphans)
return 1 + ceil(hits / self.per_page)接下来，为了使您的视图更简单，而不是覆盖get_context_data，覆盖get_paginator并将deltafirst设置为类属性：
class NewsView(ListView):
model = News
template_name="mysite/news.html"
paginate_by = 5
paginator_class = MyPaginator
deltafirst = 1
def get_paginator(self, *args, **kwargs):
if self.deltafirst:
kwargs['deltafirst'] = self.deltafirst
return super().get_paginator(*args, **kwargs)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/66800010
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