django组件分页器

 1 from django.shortcuts import render,HttpResponse
 2 
 3 # Create your views here.
 4 from app01.models import *
 5 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 6 
 7 def index(request):
 8 
 9     '''
10     批量导入数据:
11 
12     Booklist=[]
13     for i in range(100):
14         Booklist.append(Book(title="book"+str(i),price=30+i*i))
15     Book.objects.bulk_create(Booklist)
16     '''
17 
18     '''
19 分页器的使用:
20 
21     book_list=Book.objects.all()
22 
23     paginator = Paginator(book_list, 10)
24 
25     print("count:",paginator.count)           #数据总数
26     print("num_pages",paginator.num_pages)    #总页数
27     print("page_range",paginator.page_range)  #页码的列表
28 
29 
30 
31     page1=paginator.page(1) #第1页的page对象
32     for i in page1:         #遍历第1页的所有数据对象
33         print(i)
34 
35     print(page1.object_list) #第1页的所有数据
36 
37 
38     page2=paginator.page(2)
39 
40     print(page2.has_next())            #是否有下一页
41     print(page2.next_page_number())    #下一页的页码
42     print(page2.has_previous())        #是否有上一页
43     print(page2.previous_page_number()) #上一页的页码
44 
45 
46 
47     # 抛错
48     #page=paginator.page(12)   # error:EmptyPage
49 
50     #page=paginator.page("z")   # error:PageNotAnInteger
51 
52     '''
53 
54 
55     book_list=Book.objects.all()
56 
57     paginator = Paginator(book_list, 10)
58     page = request.GET.get('page',1)
59     currentPage=int(page)
60 
61 
62     try:
63         print(page)
64         book_list = paginator.page(page)
65     except PageNotAnInteger:
66         book_list = paginator.page(1)
67     except EmptyPage:
68         book_list = paginator.page(paginator.num_pages)
69 
70 
71     return render(request,"index.html",{"book_list":book_list,"paginator":paginator,"currentPage":currentPage})