96-分页器1
批量插入的方式就不能用ORM的create()方式去做了，因为create就是对sql进行insert的操作，sql最好不要每次有一条数据就去进行插入，最好的方式就是插入一组数据
from django.shortcuts import render from django.core.paginator import Paginator, EmptyPage # Create your views here. from app01.models import Book def index(request): ''' :param request: :return: ''' # book_list = [] # for i in range(100): # book_obj = Book(title="book_%s" % i, price=i*i) # book_list.append(book_obj) # # 进行批量插入 # Book.objects.bulk_create(book_list) book_list = Book.objects.all() paginator = Paginator(book_list, 10) # print(paginator.count) # print(paginator.num_pages) try: c_page = int(request.GET.get('page', 1)) c_page = paginator.page(c_page) # print(page1.object_list) for i in c_page: print(i.title) except EmptyPage as e: c_page = paginator.page(1) return render(request, 'index.html', locals())
from django.db import models # Create your models here. class Book(models.Model): title = models.CharField(max_length=32) price = models.DecimalField(decimal_places=2, max_digits=8)
"""PageDemo URL Configuration The `urlpatterns` list routes URLs to views. For more information please see: https://docs.djangoproject.com/en/2.1/topics/http/urls/ Examples: Function views 1. Add an import: from my_app import views 2. Add a URL to urlpatterns: path('', views.home, name='home') Class-based views 1. Add an import: from other_app.views import Home 2. Add a URL to urlpatterns: path('', Home.as_view(), name='home') Including another URLconf 1. Import the include() function: from django.urls import include, path 2. Add a URL to urlpatterns: path('blog/', include('blog.urls')) """ from django.contrib import admin from django.urls import path from app01 import views urlpatterns = [ path('admin/', admin.site.urls), path('index/', views.index), ]
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>分页器</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> </head> <body> <ul> {% for book in c_page %} <li> {{ book.title }}:{{ book.price }} </li> {% endfor %} </ul> <nav aria-label="Page navigation"> <ul class="pagination"> {% if c_page.has_previous%} <li> <a href="?page={{ c_page.previous_page_number }}" aria-label="Previous"> <span aria-hidden="true">上一页</span> </a> </li> {% else %} <li class="disabled"> <a href="" aria-label="Previous"> <span aria-hidden="true">上一页</span> </a> </li> {% endif %} {% for foo in page_range %} {% if c_page_n == foo %} <li class="active"><a href="?page={{ foo }}">{{ foo }}</a></li> {% else %} <li><a href="?page={{ foo }}">{{ foo }}</a></li> {% endif %} {% endfor %} {% if c_page.has_next %} <li> <a href="?page={{ c_page.next_page_number }}" aria-label="Next"> <span aria-hidden="true">下一页</span> </a> </li> {% else %} <li class="disabled"> <a href="" aria-label="Next"> <span aria-hidden="true">下一页</span> </a> </li> {% endif %} </ul> </nav> </body> </html>
97-分页器2
98-分页器3
99-分页器4