先創建表,然后生成批量數據。
在models文件里
from django.db import models # Create your models here. class Book(models.Model): name = models.CharField(max_length=32) price = models.DecimalField(max_digits=5,decimal_places=2)
然后執行python manage.py makemigrations ,python migrate 生成數據庫。把數據庫從左邊拉到右邊,
在url里創建showBooks視圖函數API,
from django.conf.urls import url from django.contrib import admin from app01 import views urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^index/', views.index), url(r'^ajaxHandle/', views.ajaxHandle), url(r'^showBooks/', views.showBooks),-------
在views文件中創建showBooks 函數,批量導入數據,用bulk_create()
從django中導入Paginstor類,用對象調用方法,
1 def showBooks(requests): 2 3 #批量導入數據bulk_create()方法 4 5 # book_list=[]#里面存一個個對象 6 # for i in range(100): 7 # book_list.append(Book(name="book%s"%i,price=2+i+2)) 8 # 9 # Book.objects.bulk_create(book_list) 10 11 book_list_all = Book.objects.all() 12 13 #分頁器Paginator,是導入了一個類,在用實列出來的對象調用方法, 14 from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger 15 16 #book_list_all 是要被分頁的對象,第二個參數,是每頁顯示的條數 17 p = Paginator(book_list_all,20)# p就是每頁的對象, 18 p.count #數據總數 19 p.num_pages #總頁數 20 p.page_range#[1,2,3,4,5],得到頁碼,動態生成, 21 22 page_num = requests.GET.get("page")#以get的方法從url地址中獲取 23 #如果輸錯了頁碼, 24 try: 25 book_list = p.page(page_num)#括號里的是頁數,顯示指定頁碼的數據,動態顯示數據,所以不能寫死了 26 27 except PageNotAnInteger:#如果輸入頁碼錯誤,就顯示第一頁 28 book_list = p.page(1) 29 except EmptyPage:#如果超過了頁碼范圍,就把最后的頁碼顯示出來, 30 book_list = p.page(p.num_pages) 31 32 return render(requests,"showBooks.html",locals())
數據庫生成數據
在templates 創建showBooks頁面,把數據庫數據渲染出來
{% load staticfiles %} <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="{% static 'bootstrap/css/bootstrap.css' %}"> </head> <body> <ul> {#request 也可以在這里渲染出來#} {% for book in book_list %} <li>{{ book.id }}     {{ book.name }}     {{ book.price }}</li> {% endfor %} </ul> <ul class="pagination"> {% if book_list.has_previous %} <li><a href="/showBooks/?page={{ book_list.previous_page_number }}">上一頁</a></li> ---直接使用方法,上一頁, {% else %} <li class="disabled"><a href="#">上一頁</a></li> {% endif %} {% for num in p.page_range %} <li><a href="/showBooks/?page={{ num }}">{{ num }}</a></li> {% endfor %} {% if book_list.has_next %} <li><a href="/showBooks/?page={{ book_list.next_page_number }}">下一頁</a></li> {% else %} <li class="disabled"><a href="#">下一頁</a></li> {% endif %} </ul> </body> </html>