Paging and paging middleware and middleware

Others 2019-10-04 11:26:41 views: null

Paging and middleware

First, pagination

Django pager (the paginator)

view.py

Copy the code 
from django.shortcuts import render,HttpResponse

# Create your views here.
from app01.models import *
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

def index(request):

    '''
    批量导入数据:

    Booklist=[]
    for i in range(100):
        Booklist.append(Book(title="book"+str(i),price=30+i*i))
    Book.objects.bulk_create(Booklist)
    '''

    '''
分页器的使用:

    book_list=Book.objects.all()

    paginator = Paginator(book_list, 10)

    print("count:",paginator.Total count) # data
    print("num_pages",paginator.num_pages) # Pages 
    print ( "page_range", paginator.page_range) # page list of 



    page objects page1 = paginator.page (1) # on page 1 
    for i in PAGE1: # traversal all data objects on page. 1 
        Print (I) 

    all data print (page1.object_list) # page. 1 


    PAGE2 = paginator.page (2) 

    Print (page2.has_next ()) # if a next 
    print (page2. next_page_number ()) # on the next page 
    print (page2.has_previous ()) # is there a previous 
    print (page2.previous_page_number ()) # Previous page numbers 



    # throwing error 
    # page = paginator.page (12) error #: EmptyPage 

    # paginator.page Page = ( "Z") # error: PageNotAnInteger 

    '' ' 


    book_list = Book.objects.all ()
 
    the paginator = Paginator (book_list,10)
    page = request.GET.get('page',1)
    currentPage=int(page)


    try:
        print(page)
        book_list = paginator.page(page)
    except PageNotAnInteger:
        book_list = paginator.page(1)
    except EmptyPage:
        book_list = paginator.page(paginator.num_pages)


    return render(request,"index.html",{"book_list":book_list,"paginator":paginator,"currentPage":currentPage})
Copy the code

 view.py

Copy the code 
DEF chakanbook (Request):
     '' ' 
        bulk import 
        Booklist = [] 
        for I in Range (100): 

             Booklist.append (models.Book (title = "Book" + STR (I), I *. price = 20 is + I) ) 

        models.Book.objects.bulk_create (Booklist) 

        : param Request: 
        : return: 
        '' ' 
    book_list = models.Book.objects.all () # book_list print is an object to see all the books 
    paginator = paginator (book_list, . 5)   # book_list there must be a collection of objects, all the books pages, a five 
    Print (paginator.page_range)   # Range (. 1,. 4) 
    NUM = request.GET.get ( " Page " ,2)# Obtain a range of pages, there is a default 
    Print (NUM, type (NUM)) 
    book_list = paginator.page (NUM) # display contents of the first page 
    return the render (Request, " chakan.html " , { " book_list " : book_list, " page_range " : page_range, " NUM " : int (NUM), "the paginator": the paginator})
Copy the code

 

index.html:

Copy the code
Copy the code 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" 
    integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>

<div class="container">

    <h4>分页器</h4>
    <ul>

        {% for book in book_list %}
             <li>{{ book.title }} -----{{ book.price }}</li>
        {% endfor %}

     </ul>


    <ul class="pagination" id="pager">

                 {% if book_list.has_previous %}
                    <li class="previous"><a href="/index/?page={{ book_list.previous_page_number }}">上一页</a></li>
                 {% else %}
                    <li class="previous disabled"><a href="#">上一页</a></li>
                 {% endif %}


                 {% for num in paginator.page_range %}

                     {% if num == currentPage %}
                       <li class="item active"><a href="/index/?page={{ num }}">{{ num }}</a></li>
                     {% else %}
                       <li class="item"><a href="/index/?page={{ num }}">{{ num }}</a></li>

                     {% endif %}
                 {% endfor %}



                 {% if book_list.has_next %}
                    <li class="next"><a href="/index/?page={{ book_list.next_page_number }}">下一页</a></li>
                 {% else %}
                    <li class="next disabled"><a href="#">下一页</a></li>
                 {% endif %}

            </ul>
</div>



</body>
</html>
Copy the code
Copy the code

Spread

Copy the code 
def index(request):


    book_list=Book.objects.all()

    paginator = Paginator(book_list, 15)
    page = request.GET.get('page',1)
    currentPage=int(page)

    #  如果页数十分多时，换另外一种显示方式
    if paginator.num_pages>30:

        if currentPage-5<1:
            pageRange=range(1,11)
        elif currentPage+5>paginator.num_pages:
            pageRange=range(currentPage-5,paginator.num_pages+1)

        else:
            pageRange=range(currentPage-5,currentPage+5)

    else:
        pageRange=paginator.page_range


    try:
        print(page)
        book_list = paginator.page(page)
    except PageNotAnInteger:
        book_list = paginator.page(1)
    except EmptyPage:
        book_list = paginator.page(paginator.num_pages)


    return render(request,"index.html",locals())
Copy the code

Second, the middleware

http://www.cnblogs.com/yuanchenqi/articles/7652353.html#_label0

 

First, pagination

Django pager (the paginator)

view.py

Copy the code 
from django.shortcuts import render,HttpResponse

# Create your views here.
from app01.models import *
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

def index(request):

    '''
    批量导入数据:

    Booklist=[]
    for i in range(100):
        Booklist.append(Book(title="book"+str(i),price=30+i*i))
    Book.objects.bulk_create(Booklist)
    '''

    '''
分页器的使用:

    book_list=Book.objects.all()

    paginator = Paginator(book_list, 10)

    print("count:",paginator.Total count) # data
    print("num_pages",paginator.num_pages) # Pages 
    print ( "page_range", paginator.page_range) # page list of 



    page objects page1 = paginator.page (1) # on page 1 
    for i in PAGE1: # traversal all data objects on page. 1 
        Print (I) 

    all data print (page1.object_list) # page. 1 


    PAGE2 = paginator.page (2) 

    Print (page2.has_next ()) # if a next 
    print (page2. next_page_number ()) # on the next page 
    print (page2.has_previous ()) # is there a previous 
    print (page2.previous_page_number ()) # Previous page numbers 



    # throwing error 
    # page = paginator.page (12) error #: EmptyPage 

    # paginator.page Page = ( "Z") # error: PageNotAnInteger 

    '' ' 


    book_list = Book.objects.all ()
 
    the paginator = Paginator (book_list,10)
    page = request.GET.get('page',1)
    currentPage=int(page)


    try:
        print(page)
        book_list = paginator.page(page)
    except PageNotAnInteger:
        book_list = paginator.page(1)
    except EmptyPage:
        book_list = paginator.page(paginator.num_pages)


    return render(request,"index.html",{"book_list":book_list,"paginator":paginator,"currentPage":currentPage})
Copy the code

 view.py

Copy the code 
DEF chakanbook (Request):
     '' ' 
        bulk import 
        Booklist = [] 
        for I in Range (100): 

             Booklist.append (models.Book (title = "Book" + STR (I), I *. price = 20 is + I) ) 

        models.Book.objects.bulk_create (Booklist) 

        : param Request: 
        : return: 
        '' ' 
    book_list = models.Book.objects.all () # book_list print is an object to see all the books 
    paginator = paginator (book_list, . 5)   # book_list there must be a collection of objects, all the books pages, a five 
    Print (paginator.page_range)   # Range (. 1,. 4) 
    NUM = request.GET.get ( " Page " ,2)# Obtain a range of pages, there is a default 
    Print (NUM, type (NUM)) 
    book_list = paginator.page (NUM) # display contents of the first page 
    return the render (Request, " chakan.html " , { " book_list " : book_list, " page_range " : page_range, " NUM " : int (NUM), "the paginator": the paginator})
Copy the code

 

index.html:

Copy the code
Copy the code 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" 
    integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>

<div class="container">

    <h4>分页器</h4>
    <ul>

        {% for book in book_list %}
             <li>{{ book.title }} -----{{ book.price }}</li>
        {% endfor %}

     </ul>


    <ul class="pagination" id="pager">

                 {% if book_list.has_previous %}
                    <li class="previous"><a href="/index/?page={{ book_list.previous_page_number }}">上一页</a></li>
                 {% else %}
                    <li class="previous disabled"><a href="#">上一页</a></li>
                 {% endif %}


                 {% for num in paginator.page_range %}

                     {% if num == currentPage %}
                       <li class="item active"><a href="/index/?page={{ num }}">{{ num }}</a></li>
                     {% else %}
                       <li class="item"><a href="/index/?page={{ num }}">{{ num }}</a></li>

                     {% endif %}
                 {% endfor %}



                 {% if book_list.has_next %}
                    <li class="next"><a href="/index/?page={{ book_list.next_page_number }}">下一页</a></li>
                 {% else %}
                    <li class="next disabled"><a href="#">下一页</a></li>
                 {% endif %}

            </ul>
</div>



</body>
</html>
Copy the code
Copy the code

Spread

Copy the code 
def index(request):


    book_list=Book.objects.all()

    paginator = Paginator(book_list, 15)
    page = request.GET.get('page',1)
    currentPage=int(page)

    #  如果页数十分多时，换另外一种显示方式
    if paginator.num_pages>30:

        if currentPage-5<1:
            pageRange=range(1,11)
        elif currentPage+5>paginator.num_pages:
            pageRange=range(currentPage-5,paginator.num_pages+1)

        else:
            pageRange=range(currentPage-5,currentPage+5)

    else:
        pageRange=paginator.page_range


    try:
        print(page)
        book_list = paginator.page(page)
    except PageNotAnInteger:
        book_list = paginator.page(1)
    except EmptyPage:
        book_list = paginator.page(paginator.num_pages)


    return render(request,"index.html",locals())
Copy the code

Second, the middleware

http://www.cnblogs.com/yuanchenqi/articles/7652353.html#_label0

 

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Origin www.cnblogs.com/maaosheng/p/11621510.html
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