Django-paignator

Asasiy tushinchalar

• count- ob'ektlarning umumiy soni
• num_pages- sahifalarning umumiy soni
• page_range- sahifa raqamlari diapazoni iteratori
• number- berilgan sahifa uchun sahifa raqamini ko'rsatadi
• paginator- bog'langan Paginatorob'ektni ko'rsatadi
• has_next()- Trueagar keyingi sahifa mavjud bo'lsa, qaytadi
• has_previous()- - Trueoldingi sahifa mavjud bo'lsa, qaytaradi
• next_page_number()- keyingi sahifaning raqamini qaytaradi
• previous_page_number()- oldingi sahifaning raqamini qaytaradi Funktsiyaga asoslangan ko'rinishlar Keyinchalik, funksiyaga asoslangan ko'rinishlarda sahifalash bilan qanday ishlashni ko'rib chiqamiz:

    from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
    from django.shortcuts import render
    from . models import Employee

    def index(request):
       object_list = Employee.objects.all()
       page_num = request.GET.get('page', 1)
       paginator = Paginator(object_list, 6) # 6 employees per page

       try:
          page_obj = paginator.page(page_num)
       except PageNotAnInteger:
          page_obj = paginator.page(1)
       except EmptyPage:
          page_obj = paginator.page(paginator.num_pages)

       return render(request, 'index.html', {'page_obj': page_obj})

1- page_num URL manzilidan oʻzgaruvchi aniqlandi . 2- Paginator Sinfni unga kerakli parametrlar, employeesQuerySet va har bir sahifaga kiritilishi kerak bo'lgan xodimlar sonini o'tkazgan holda yaratdi . 3- page_obj Oldingi va keyingi sahifalarga o'tish uchun metama'lumotlar bilan birga sahifalangan xodimlar ma'lumotlarini o'z ichiga olgan sahifa ob'ekti yaratildi .

paginotor ko'rinish

      {% if page_obj.has_previous %}
          <a href="?page={{ page_obj.previous_page_number }}">« Previous page</a>
         {% if page_obj.number > 3 %}
              <a href="?page=1">1</a>
         {% endif %}
         {% if page_obj.number > 4 %}
              <span>...</span>
         {% endif %}
      {% endif %}

      {% for num in page_obj.paginator.page_range %}
        {% if page_obj.number == num %}
           <a href="?page={{ num }}">{{ num }}</a>
        {% elif num > page_obj.number|add:'-3' and num < page_obj.number|add:'3' %}
           <a href="?page={{ num }}">{{ num }}</a>
        {% endif %}
     {% endfor %}

     {% if page_obj.has_next %}
       {% if page_obj.number < page_obj.paginator.num_pages|add:'-3' %}
       <span>...</span>
        <a href="?page={{ page_obj.paginator.num_pages }}">{{ page_obj.paginator.num_pages }}</a>
   {% elif page_obj.number < page_obj.paginator.num_pages|add:'-2' %}
       <a href="?page={{ page_obj.paginator.num_pages }}">{{ page_obj.paginator.num_pages }}</a>
    {% endif %}
    <a href="?page={{ page_obj.next_page_number }}">Next Page »</a>
    {% endif %}

myproject>sittengs.py

myproject>urls.py

 from django.contrib import admin
 from django.urls import path, include

 urlpatterns = [
     path('admin/', admin.site.urls),
     path('', include('myapp.urls')),
 ]

myapp>models.py

 from django.db import models

 class Post(models.Model):
     title=models.CharField(max_length=250, help_text="sarlavha kriting")
     body=models.TextField(help_text=" text kiriting")
     def __str__(self):
        return self.title

myapp>admin.py

 from django.contrib import admin
 from .models import Post

 @admin.register(Post)
 class PostModel(admin.ModelAdmin):
     list_display=['title','body']

myapp>views.py

 from django.shortcuts import render
 from .models import Post
 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

 def home(request):
    post=Post.objects.all()
    page=request.GET.get('page', 1)
    paginator=Paginator(post, 1 )
    try:
        post=paginator.page(page)
    except PageNotAnInteger:
        post=paginator.page(1)
    except EmptyPage:
        post=paginator.page(paginator.num_pages)
    return render(request, 'index.html', {'post':post})

myapp>urls.py

  from django.urls import path
  from .views import home

  urlpatterns =[
     path('', home, name="home"),
  ]

templates>index.html

 <!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384->      >      >      >      EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" >      crossorigin="anonymous"></script>
     <title>Document</title>
 </head>
 <body>
 
   {% for i in post %}
   <h1>{{ i.title }}</h1><br>
   <p>{{ i.body }}</p>
   {% endfor %}
   <!-- disabled -->
   <!-- tabindex="-1" aria-disabled="true" -->
     <nav aria-label="...">
         <ul class="pagination">
           {% if post.has_previous %}
           <li class="page-item ">
             <a class="page-link" href="{{ request.path }}?page={{ post.previous_page_number }}" >Previous</a>
           </li>
           {% endif %}
           {% if page.number > 3 %}
                   <li class="page-item">
                     <a class="page-link" href="{{ request.path }}?page=1">1</a>
                   </li>
           {% endif %}
 
           {% for i in post.paginator.page_range %}
                 {% if post.number == i %}
                   <li class="page-item active">
                     <span class="page-link">
                       {{ i }}
                       <span class="sr-only"></span>
                     </span>
                   </li>
                   {% elif i > post.number|add:'-3' and i < post.number|add:'3' %}
                     <li class="page-item">
                       <a class="page-link" href="{{ request.path }}?page={{ i }}">{{ i }}</a>
                     </li>
                 {% endif %}
               {% endfor %}
 
           {% if post.has_next %}
           <li class="page-item">
             <a class="page-link" href="{{ request.path }}?page={{ post.next_page_number }}">Next</a>
           </li>
           {% endif %}
         </ul>
       </nav>
 </body>
 </html>