I.Django内置分页

 

指令：

"""    per_page: 每页显示条目数量    count:    数据总个数    num_pages:总页数    page_range:总页数的索引范围，如: (1,10),(1,200)    page:     page对象     has_next              是否有下一页    next_page_number      下一页页码    has_previous          是否有上一页    previous_page_number  上一页页码    object_list           分页之后的数据列表    number                当前页    paginator             paginator对象     """

 

 

插入数据：

"""    #插数据    for i in range(100):    n = 'root'+str(i)    models.Books.objects.create(title=n)    #插数据(首选)    book_list = []    #[
     
      .....]    for i in range(100):        book_list.append(models.Books(title="book%s" % i))    models.Books.objects.bulk_create(book_list)    """
     

 

 

 

代码示例：

urls.py

url(r'^index/',views.index),

 

views.py

from django.core.paginator import Paginator,Page,PageNotAnInteger,EmptyPagedef index(request):    """    分页    :param request:    :return:    """    # for i in range(300):   #插数据    #     n='root'+str(i)    #     models.Boy.objects.create(name=n)    current_page=request.GET.get('page')    boy_list=models.Boy.objects.all()    paginator =Paginator(boy_list,10)    try:        posts=paginator.page(current_page)    except PageNotAnInteger as e:        posts=paginator.page(1)    except EmptyPage as e:        posts=paginator.page(1)    return render(request,'in.html',{
    'posts':posts})

 

in.html

    
                  
用户列表
        
      
               {% for f in posts.object_list %}            
       
{
    { f.name }}
        {% endfor %}    
      
    
      
                       {% if posts.has_previous %}            
       上一页        {% endif %}        {% for num in posts.paginator.page_range %}            
       {
    { num }}        {% endfor %}        {% if posts.has_next %}            
       下一页        {% endif %}    
      

 

#注意点：Django内置分页 不适合 页码显示，适合 上一页和下一页。（若用，会显示所有页码）

 

 

II.Django 自定义分页

urls.py

url(r'^custom/',views.custom),

 views.py

from utils.pager import PageInfodef custom(request):   all_count = models.Boy.objects.all().count()   page_info = PageInfo(request.GET.get('page'),all_count,10,'/custom',11)   boy_list = models.Boy.objects.all()[page_info.start():page_info.end()]   return render(request,'custom.html',locals())

 

 custom.html

    
              
              
用户列表
    
      
               {% for row in boy_list %}            
       
{
    { row.name }}
        {% endfor %}    
      
    
      
      
       
                 {
     { page_info.pager|safe }}      
       
    
      

 

 

 pager.py

class PageInfo(object):    def __init__(self,current_page,all_count,per_page,base_url,show_page=11):        """        :param current_page:        :param all_count:数据总行数        :param per_page:        :param base_url:        :param show_page:        """        try:            self.current_page=int(current_page)        except Exception as e:            self.current_page = 1        self.per_page = per_page        a,b = divmod(all_count,per_page)        if b:            a=a+1        self.all_pager = a        self.show_page = show_page        self.base_url = base_url    def start(self):        return (self.current_page-1) * self.per_page    def end(self):        return self.current_page * self.per_page    def pager(self):        page_list = []        half = int((self.show_page-1)/2)        #如果数据总页数<11        if self.all_pager < self.show_page:            begin=1            stop = self.all_pager + 1        #如果数据总页数 > 11        else:            #数据当前页 <=5,永远显示1,11            if self.current_page <= half:                begin = 1                stop = self.show_page + 1            else:                if self.current_page + half > self.all_pager:                    begin = self.all_pager - self.show_page + 1                    stop = self.all_pager + 1                else:                    begin = self.current_page - half                    stop = self.current_page + half + 1            if self.current_page <= 1:                prev = '
上一页
'            else:                prev="
上一页
"%(self.base_url,self.current_page-1)            page_list.append(prev)            for i in range(begin,stop):                if i==self.current_page:                    temp = '
%s
'%(self.base_url,i,i,)                else:                    temp="
%s
"%(self.base_url,i,i,)                page_list.append(temp)            if self.current_page >= self.all_pager:                nex="
下一页
"            else:                nex="
下一页
"%(self.base_url,self.current_page+1,)            page_list.append(nex)            return ''.join(page_list)

 

 

 III.Django 自定义分页

 #-------更多的使用模块

urls.py

url(r'^$',views.books),     #使用的根目录

 

views.py

from django.core.paginator import Paginator,EmptyPage,PageNotAnIntegerdef books(req):      book_list_all=models.Books.objects.all()    p_obj = Paginator(book_list_all,20)    #--------------------p_obj    print(p_obj.count)       #100    print(p_obj.num_pages)   #5    print(p_obj.page_range)  #！！！    #-------------------------------    page_num = req.GET.get('page')    try:        book_list = p_obj.page(page_num)    except EmptyPage:        book_list = p_obj.page(p_obj.num_pages)    except PageNotAnInteger:        book_list = p_obj.page(1)    return render(req,'show.html',locals())

 

show.html

    
              
          
      
               {% for book in book_list %}            
       
{
    { book.title }}
        {% endfor %}    
      
    
      
               {% if book_list.has_previous %}            
       
上一页
        {% else %}            
       
上一页
        {% endif %}        {% for num in p_obj.page_range %}            
       
{
    { num }}
        {% endfor %}        {% if book_list.has_next %}            
       
下一页
        {% else %}            
       
下一页
        {% endif %}    
      

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.简单登录

view.py

def login(request):    if request.method == 'GET':        return render(request,'login.html')    else:        u = request.POST.get('user')        p = request.POST.get('pwd')        if u=='alex' and p=='123':            request.session['username']='alex'            request.session['email'] = 'alex3714@qq.com'            return redirect('/index/')        else:            return render(request,'login.html',{
    'msg':'用户名或密码错误'})def index(request):       return HttpResponse('登录成功')

login.html

    
              
      
               {
     % csrf_token %}        
               
               
       {
     { msg }}