Develop Reference

pagination in django works calculates pages correctly but doesn't separate them

The paginator in django correctly calculates the number of pages, but does not break the models into pages and everything is displayed on 1 page, please tell me what to do with this
This is my views.py,where is a paginator:
from django.shortcuts import render, get_object_or_404
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from .models import *
def index(request):
news = Content.objects.filter(is_published=True)
page = request.GET.get('page', 1)
paginator = Paginator(news, 20)
try:
page_obj = paginator.page(page)
except EmptyPage:
page_obj = paginator.page(1)
except PageNotAnInteger:
page_obj = paginator.page(paginator.num_pages)
return render(request, 'content/index.html', {'news': news, 'page_obj': page_obj})
def view_news(request, news_id):
news_item = get_object_or_404(Content, id=news_id)
return render(request, 'Content/view_news.html', {'news_item': news_item})
And there is my paginator template:
{% block content %}
<nav class="paginator">
<ul class="pagination">
{% if page_obj.has_previous %}
<a class="page-link" href="?page={{ page_obj.previous_page_number }}">
<li class="page-item">Предыдущая</li>
</a>
{% else %}
<a class="page-link">
<li class="page-item">Предыдущая</li>
</a>
{% endif %}
{% for i in page_obj.paginator.page_range %}
{% if page_obj.number == i %}
<a class="page-link">
<li class="page-item">{{ i }}</li>
</a>
{% else %}
<a class="page-link" href="?page={{ i }}">
<li class="page-item">{{ i }}</li>
</a>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<a class="page-link" href="?page={{ page_obj.next_page_number }}">
<li class="page-item">Следующая</li>
</a>
{% else %}
<a class="page-link">
<li class="page-item">Следующая</li>
</a>
{% endif %}
</ul>
</nav>
{% endblock %}
Help me please with this problem

pagination does not work for numbers in between and also for reverse in django

I am filtering my data, and also applying paginator, I have found some solution and I used it but it is working only for the next button and not for previous and button numbers in between i.e. for {{i}} (Django, python)
this is template_tag file
myapp_extra.py
from django import template
register = template.Library()
#register.simple_tag
def my_url(value, field_name, urlencode=None):
url = '?{}={}'.format(field_name, value)
if urlencode:
querystring = urlencode.split('&')
filterd_querystring = filter(lambda p: p.split('=')[0]!=field_name, querystring)
encoded_querystring = '&'.join(filterd_querystring)
url = '{}&{}'.format(url, encoded_querystring)
return url
in my html
{% load myapp_extra %}
<other code>
<nav>
<ul class="pagination rounded-separated justify-content-center" style="float: right; margin-top: 1%;">
{% if employees_attendance_list.has_previous %}
<li class="page-item"><a class="page-link" href="{% my_url employees_attendance_list.previous_page_number 'page' request.GET.urlencode }"><i class="mdi mdi-chevron-left"></i></a></li>
{% else %}
<li class="disabled"></li>
{% endif %}
{% for i in employees_attendance_list.paginator.page_range %}
{% if employees_attendance_list.number == i %}
<li class="page-item active"><a class="page-link" >{{ i }}</a></li>
{% else %}
<li class="page-item"><a class="page-link" href="{% my_url i 'page' request.GET.urlencode}">{{ i }}</a></li>
{% endif %}
{% endfor %}
{% if employees_attendance_list.has_next %}
<li class="page-item"><a class="page-link" href="{% my_url employees_attendance_list.next_page_number 'page' request.GET.urlencode %}"><i class="mdi mdi-chevron-right"></i></a></li>
{% else %}
<li class="disabled"></li>
{% endif %}
</ul>
</nav>
in views
page = request.GET.get('page', 1)
paginator = Paginator(employees_attendance, settings.PAGE_LIMIT)
try:
employees_attendance_list = paginator.page(page)
except PageNotAnInteger:
employees_attendance_list = paginator.page(1)
except EmptyPage:
employees_attendance_list = paginator.page(paginator.num_pages)

I have made some changes in my html
<nav>
<ul class="pagination rounded-separated justify-content-center" style="float: right; margin-top: 1%;">
{% for i in employees_attendance_list.paginator.page_range %}
<li class="page-item">
<a class="page-link" href="{% my_url i 'page' request.GET.urlencode %}">{{ i }}</a>
</li>
{% endfor %}
</ul>
</nav>

PageNotAnInteger at /products/ That page number is not an integer

So I'm trying to use pagination in django, When I click on previous it takes me to localhost:8000/thatpage/?page= when it is supposed to take me to the previous page, It also gives me error on that page. I have tried handling it in my views.py but it doesn't work.
I have also tried using books_obj.previous_page_number but that doesn't work too.
I'm using Django 3.1
views.py
def showproducts(request):
oof = CartItem.objects.filter(user=request.user).values_list('book', flat=True)
lmao = OrderItem.objects.filter(user=request.user).values_list('book', flat=True)
hehe = CartItem.objects.filter(user=request.user)
category = Category.objects.all()
haha = Paginator(Book.objects.all(), 2)
page = request.GET.get('page')
if page is None or "":
page = 1
fianlprice = 0
for item in hehe:
fianlprice += item.book.price
# books = Book.objects.all()
books = haha.page(page)
return render(request, 'main/products.html', {'books':books, 'price':fianlprice, 'cart':oof, 'order':lmao, 'category':category})
products.html
<h1>Products</h1>
<h1>{{ error }}</h1>
{% if user.is_authenticated %}
<h1>Your cart currently costs ${{ price }}</h1>
{% else %}
<h1>Please login to view your cart</h1>
{% endif %}
<form method="GET" action="/search/">
<label>Choose a category</label>
<select name="category" id="category">
<option value="All" selected>All</option>
{% for name in category %}
<option value="{{ name.name }}">{{ name.name }}</option>
{% endfor %}
</select>
<input type="text" placeholder="Search here" name="search" id="search">
<button type="submit">Search</button>
</form>
{% for book in books %}
<h3>{{ book.name }}</h3>
<img src= "/media/{{ book.image }}" alt="">
<p>{{ book.description }}</p>
{% if not user.is_authenticated %}
<p>Please login</p>
{% else %}
{% if book.id in cart %}
<form method="POST" action="/removefromcartforhome/">
{% csrf_token %}
<button type="submit" name="removeid" value="{{ book.id }}">remove item from cart</button>
</form>
{% elif book.id in order %}
<h3>You already own this</h3>
{% else %}
<form method="POST" action="/addtocartforhome/">
{% csrf_token %}
<button type="submit" name="bookid" value="{{ book.id }}">Add to cart</button>
</form>
{% endif %}
{% endif %}
{% endfor %}
{% if books.has_other_pages %}
{% if books.has_previous %}
<li class="page-item">
«
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">«</a>
</li>
{% endif %}
{% for i in books.paginator.page_range %}
{% if books.number == i %}
<li class="page-item active">
<a class="page-link">{{i}}</a>
</li>
{% else %}
<li class="page-item">
{{i}}
</li>
{% endif %}
{% endfor %}
{% if books.has_next %}
<li class="page-item">
»
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">»</a>
</li>
{% endif %}
{% else %}
<p>no pages</p>
{% endif %}

Change this code from:
if page is None or "":
page = 1
to
page = request.GET.get('page', None)
if page == None or page == "":
page = 1
# or
if not page:
page = 1
Update
You can use http referee to redirect to previous page:
if not page:
return HttpResponseRedirect(request.META.get('HTTP_REFERER'))

Pagination doesn't works on my Django App as expected

I'm trying to paginate, it shows in the address bar that I'm on page 2 but nothing new gets displayed.
Below is an excerpt from my views.py looks:
class JobList(ListView):
model = Job
template_name = "jobs/job_listings.html"
context_object_name = "job_list"
ordering = ['-published_date']
paginate_by = 3
def get_context_data(self, **kwargs):
context = super(JobList, self).get_context_data(**kwargs)
jobs_expiring_soon = Job.objects.filter(application_last_date__gte=datetime.now(), application_last_date__lte=lookup_date)
state_list = State.objects.order_by('name')
profession_list = Profession.objects.order_by('name')
context['jobs_expiring_soon'] = jobs_expiring_soon
context['state_list'] = state_list
context['profession_list'] = profession_list
return context
Below is an excerpt from my urls.py file:
path('', JobList.as_view(), name = 'job-list'),
Below is the associated template:
{% extends 'base.html' %}
{% block page_content %}
{% for job in job_list %}
<div class="listing-wrapper">
<div class="listing-container border-top border-bottom">
<a href="{{ job.get_absolute_url }}">
<h2 class="heading mt-3 mb-1 mx-2 d-inline-block">{{ job.title|truncatechars:75 }}</h2>
<p class="mx-2"><span class="sub-heading mr-1">Number of Posts:</span><span class="mr-1 ml-1">{{ job.nop }}</span>|<span class="sub-heading ml-1 mr-1">Last Date to Apply:</span><span>{{ job.application_last_date|date:"j-M-Y" }}</span></p>
<p class="mx-2 mb-3">{{ job.summary|truncatechars:200 }}</p>
</a>
</div>
</div>
{% endfor %}
{% if is_paginated %}
<ul class="pagination justify-content-center my-4">
{% if page_obj.has_previous %}
<li class="page-item">
<a class="page-link bg-dark text-white" href="?page{{ page_obj.previous_page_number }}">← Previous Page</a>
</li>
{% endif %}
{% if page_obj.has_next %}
<li class="page-item">
<a class="page-link bg-dark text-white" href="?page{{ page_obj.next_page_number }}">Next Page →</a>
</li>
{% endif %}
</ul>
{% endif %}
{% endblock page_content %}
I would really grateful, if anyone could please help me in getting this fixed. Thanks in advance!

Try setting context_object_name = 'job'. I believe _list gets appended to it automatically which would mean your current view generates the context job_list_list.

Filters not following on pagination in Django

I'm trying to set up pagination within my Django project but I can't find a way to make the filters (ptags in my case) follow to the next pages.
Ps; I use Django-haystack with faceting for filtering.
I have a custom forms.py
from haystack.forms import FacetedSearchForm
class FacetedProductSearchForm(FacetedSearchForm):
def __init__(self, *args, **kwargs):
data = dict(kwargs.get("data", []))
self.ptag = data.get('ptags', [])
super(FacetedProductSearchForm, self).__init__(*args, **kwargs)
def search(self):
sqs = super(FacetedProductSearchForm, self).search()
if self.ptag:
query = None
for ptags in self.ptag:
if query:
query += u' OR '
else:
query = u''
query += u'"%s"' % sqs.query.clean(ptags)
sqs = sqs.narrow(u'ptags_exact:%s' % query)
return sqs
That I pass in my Views:
class FacetedSearchView(BaseFacetedSearchView):
form_class = FacetedProductSearchForm
facet_fields = ['ptags']
template_name = 'search_result.html'
paginate_by = 3
context_object_name = 'object_list'
Here's my full search_result.html:
<div>
{% if page_obj.object_list %}
<ol class="row top20" id="my_list">
{% for result in page_obj.object_list %}
<li class="list_item">
<div class="showcase col-sm-6 col-md-4">
<div class="matching_score"></div>
<a href="{{ result.object.get_absolute_url }}">
<h3>{{result.object.title}}</h3>
<h5>{{ result.object.destination }}</h5>
<img src="{{ result.object.image }}" class="img-responsive">
</a>
<div class="text-center textio">
<ul class="tagslist">
<li class="listi">
{% for tags in result.object.ptags.names %}
<span class="label label-info"># {{ tags }}</span>
{% endfor %}
</li>
</ul>
</div>
</div>
</li>
{% endfor %}
</ol>
</div>
I'm able to pass the query which is a destination to the next page by adding this at the bottom of my html:
{% if is_paginated %}
<ul class="pagination pull-right">
{% if page_obj.has_previous %}
<li><i class="fas fa-angle-left"></i>Previous page</li>
{% else %}
<li class="disabled"><span><i class="fas fa-angle-left"></i>Previous page</span></li>
{% endif %}
{% if page_obj.has_next %}
<li>See more results<i class="fas fa-angle-right"></i></li>
{% else %}
<li class="disabled"><span>See more results<i class="fas fa-angle-right"></i></span></li>
{% endif %}
</ul>
{% endif %}
{% else %}
<p> Sorry, no result found for the search term <strong>{{query}} </strong></p>
{% endif %}
But If I try to add the ptags field within the pagination code by doing &ptags like this:
{% if is_paginated %}
<ul class="pagination pull-right">
{% if page_obj.has_previous %}
<li><i class="fas fa-angle-left"></i>Previous page</li>
{% else %}
<li class="disabled"><span><i class="fas fa-angle-left"></i>Previous page</span></li>
{% endif %}
{% if page_obj.has_next %}
<li>See more results<i class="fas fa-angle-right"></i></li>
{% else %}
<li class="disabled"><span>See more results<i class="fas fa-angle-right"></i></span></li>
{% endif %}
</ul>
{% endif %}
{% else %}
<p> Sorry, no result found for the search term <strong>{{query}} </strong></p>
{% endif %}
I get this error when I go to page 2 and the selected checkboxes filters (ptags) are not following:
Page not found (404)
Request Method: GET
Request URL: http://localhost:8000/search/?q=las%20vegas&ptags=&page=2
Raised by: search.views.FacetedSearchView
How can I fix this?

Your template pagination code is removing the extra filter parameters, use this -
In your my_tags.py add this template tag:
#register.simple_tag(name='url_replace')
def url_replace(request, field, value):
d = request.GET.copy()
d[field] = value
return d.urlencode()
paginate as -
{% if is_paginated %}
<br>
<div class="row">
<div class="col-12">
<ul class="pagination float-right">
{% if page_obj.has_previous %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' page_obj.previous_page_number %}">«</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">«</span></li>
{% endif %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="active page-item"><span class="page-link">{{ i }} <span class="sr-only">(current)</span></span></li>
{% else %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' i %}">{{ i }}</a></li>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' page_obj.next_page_number %}">»</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">»</span></li>
{% endif %}
</ul>
</div>
</div>
{% endif %}