django进阶（六）之cbv和fbv 装饰器应用

视图函数views.py

from django.shortcuts import render

# Create your views here.
from django.shortcuts import HttpResponse
from django.shortcuts import redirect
import os
from django.urls import reverse
from cmdb import models
from django.utils.safestring import mark_safe

from utils import pagination

from django import views

def auth(func):
    def inner(request,*args,**kwargs):
        v = request.COOKIES.get('uname')
        if not v:
            return redirect('/cmdb/login/')
        return func(request,*args,**kwargs)
    return inner


def login(request):
    error_msg = ""
    # if  request.method == "GET":
    #     return render(request,'login.html')
    # elif  request.method == "POST":
    #     u = request.POST.get('user')
    #     p = request.POST.get('password')
    #     ##如果数据库里有多个相同的数据，取第一个，如果没有就会显示none
    #     obj = models.UserInfo.objects.filter(username=u,password=p).first()
    #
    #     #①、判断条件：如果obj为none，则用户不存在或密码错误，如果不为none则存在
    #     #②、判断个数，count = obj = models.UserInfo.objects.filter(username=u,password=p).count()
    #     if obj:
    #         return redirect('/cmdb/index/')
    #     else:
    #         error_msg = "用户名密码错误"
    #         return render(request,'login.html',{'error_msg' : error_msg})

####test_cookie#########
    if request.method == 'GET':
        return render(request,'login.html')
    elif request.method == "POST":
        u = request.POST.get('user')
        p = request.POST.get('password')
        ##如果数据库里有多个相同的数据，取第一个，如果没有就会显示none
        obj = models.UserInfo.objects.filter(username=u,password=p).first()


        if obj:         ##如果存在数据（不为空）则正确
            res = redirect('/cmdb/index/')
            res.set_cookie('uname',u)
            return res
        else:
            error_msg = "用户名密码错误"
            return render(request,'login.html',{'error_msg' : error_msg})


# def login_test(request):
#     if request.method == "GET":
#         return render(request,'login.html')
#     elif  request.method == "POST":
#         u = request.POST.get('user')
#         p = request.POST.get('password')
#         ##如果数据库里有多个相同的数据，取第一个，如果没有就会显示none
#         obj = models.UserInfo.objects.filter(username=u,password=p).first()
#
#         #①、判断条件：如果obj为none，则用户不存在或密码错误，如果不为none则存在
#         #②、判断个数，count = obj = models.UserInfo.objects.filter(username=u,password=p).count()
#         if obj:
#             return redirect('/cmdb/index/')
#         else:
#             error_msg = "用户名密码错误"
#             return render(request,'login.html',{'error_msg' : error_msg})


def index(request):
    v = request.COOKIES.get('uname')
    return render(request,'index.html',{'current_user':v})



def userinfo(request):
    if request.method == 'GET':
        userlist = models.UserInfo.objects.all()
        group_list = models.UserGroup.objects.all()

        return render(request,'userinfo.html',{'userlist':userlist,'grouplist':group_list})

    elif request.method == 'POST':
        u = request.POST.get('username')
        p = request.POST.get('password')
        role = request.POST.get('group_id')
        #print (role)
        models.UserInfo.objects.create(username=u,password=p,user_group_id=role)
        return redirect('/cmdb/userinfo')
def usergroup_info(request):
    pass

def user_detail(request,uid):
    userdetail = models.UserInfo.objects.filter(id=uid)
    ###当上面为first时，userdetail.html用户详细信息下面的值就不能用循环了
    ##userdetail.query   可以打印sql语句 models.UserInfo.objects.get(id=uid) 另一种取值方法，不存在会报错
    return render(request,'userdetail.html',{'userdetail':userdetail})


def user_del(request,uid):
    models.UserInfo.objects.filter(id=uid).delete()
    return redirect('/cmdb/userinfo')

def user_edit(request,uid):
    if request.method == 'GET':
        user_infomation = models.UserInfo.objects.filter(id=uid)
        return render(request,'edit.html',{"user_infomation":user_infomation})
    elif request.method == 'POST':
        user_id = request.POST.get('id')
        uname = request.POST.get('username')
        pwd = request.POST.get('password')
        models.UserInfo.objects.filter(id=user_id).update(username=uname,password=pwd)
        return redirect('/cmdb/userinfo')

def orm(request):
    models.UserInfo.objects.create(
        username = 'roo12',
        password = 'root123',
        email = 'aaa',
        test = 'test',
        user_group_id = 1
    )
    return HttpResponse('orm')
# USRE_LIST = []
#
# def home(request):
#     if request.method == 'POST':
#         uname = request.POST.get('username')
#         email = request.POST.get('email')
#         gender = request.POST.get('gender')
#         user_dic = {'u':uname,'e':email,'gender':gender}
#         USRE_LIST.append(user_dic)
#     return render(request,'home.html',{'user_list':USRE_LIST})
#
# def login(request):
#
#     if request.method == "GET":
#         return render(request,'login.html')
#     ####用户名密码验证操作
#     elif  request.method == "POST":
#         ###获取选择的值
#         # v = request.POST.getlist('upload')      ###此处的upload为login.html里文件上传标签的属性值
#         # print (v)                               ###传一个图片，默认情况下获得的为图片的名称
#         file = request.FILES.get('upload')
#         file_path = os.path.join('upload',file.name)
#         f = open(file_path,mode='wb')
#         for i in file.chunks():
#             f.write(i)
#         f.close()
#         from  django.core.files.uploadedfile import InMemoryUploadedFile
#         return render(request, 'login.html')
#
#     else:
#         return redirect(request,'/login')




# user_list = {
#     '1' : {'username':"root1",'email':"aa@aa.com",'passwd':"aaaa"},
#     '2' : {'username':"root2",'email':"aa@aaa.com",'passwd':"aaaqa"},
#     '3' : {'username':"root3",'email':"aa@aaaa.com",'passwd':"aaaaaa"},
# }
#
#
# def detail(request,nid,uid):
#     print (request.path_info)
#
#     v = reverse('detail',args=(90,80,))
#     print (v)
#     return render(request, 'detail.html')
    # detail_info = user_list[nid]
    #
    # return render(request,'detail.html',{'detail_info':detail_info})

# class Home(View):
#
#     ##此处为在执行get和post函数之前要做的事（自定义的功能），程序执行时，会通过View下的dispatch函数来判断请求是get方法还是post方法
#     #然后去执行相应的函数，此处相当于在判断请求方法之前自定义功能
#     def dispatch(self, request, *args, **kwargs):
#         print('before')
#         ###下面为调用父类的dispatch方法
#         result = super(Home,self).dispatch(request,*args, **kwargs)
#         print('after')
#         return result
#
#     def get(self,request):
#
#         print(request.method)
#         return render(request,'test.html',{'user_dict':user_list})
#
#
#     def post(self,request):
#
#         print (request.method,'post')
#         return render(request,'test.html',{'user_dict':user_list})

# def orm(request):
#
#     ###创建用户①
#     #models.UserInfo.objects.create(username="root",password="123456")
#
#     ###创建用户②、
#
#     #dict = {"username":"test","password":"test"}
#     #models.UserInfo.objects.create(**dict)
#
#     ###创建用户③、
#     # obj = models.UserInfo(username='testgao',password='testgao')
#     # obj.save()
#
#     ##查询数据
#
#     # result = models.UserInfo.objects.all()
#     # print (result)
#     #
#     # for row in result:
#     #     print (row.id,row.username,row.password)
#     # result1=models.UserInfo.objects.filter(username='root')
#     # print (result1)
#     # return HttpResponse('orm')
#
#     ###删除
#
#     # models.UserInfo.objects.all().delete()
#     # models.UserInfo.objects.filter('id=2').delete()
#
#     ##改
#     models.UserInfo.objects.all().update(password='aaa')
#
#     models.UserInfo.objects.filter(id='3').update(password='32432')

def test(request,name):
    return HttpResponse(name)


def test_fun(request):
    name = 'EWREREWFDAfdsa'
    return render(request,'test_fun.html',{'name':name})

list = []
for i in range(1090):
    list.append(i)


def page(request):
    current_page = request.GET.get('p', 1)
    current_page = int(current_page)

    # val = request.COOKIES.get('per_page_count', 10)
    # val = int(val)

    val = request.COOKIES.get('per_page_count')
    #request.get_signed_cookie('key',salt='dfdsa')  #解密时也要加上加密时用的salt参数及相同的salt值
    val = int(val)

    page_obj = pagination.Page(current_page, len(list), val)

    data = list[page_obj.start:page_obj.end]

    page_str = page_obj.page_str("/cmdb/page/")

    return  render(request,'page.html',{'li':data,'page_str':page_str}) ##li为数据内容，page_str 为页数

    # current_page = request.GET.get('p',1)           ##获取p的值
    # current_page=int(current_page)                  ##转化为整型
    #
    # start = (current_page - 1 ) * 10                ###起始内容页数
    # end = current_page * 10                         ##结束内容页数据量
    #
    # data = list[start:end]
    #
    # all_count = len(list)       ##所有数据
    # count,y = divmod(all_count,10)      ##divmod函数用来整除取余
    #
    # if y:       ##如果y为不为0，则说明有余数，页数要加1来显示超过整除的部分的
    #     count +=1
    #
    # page_list = []
    # for i in range(1,count+1):  ##总页数
    #     if i == current_page:
    #         temp = '<a class="page active" href="/cmdb/page/?p=%s">%s</a>' % (i,i)  ##添加html模版,如果
    #     else:
    #         temp = '<a class="page" href="/cmdb/page/?p=%s">%s</a>' % (i,i)
    #
    #     page_list.append(temp)
    #
    # page_str = mark_safe("".join(page_list))            ##此步是为了安全的使page_list的值传入到html中正常显示，而不是显示为字符串
    # return  render(request,'page.html',{'li':data,'page_str':page_str}) ##li为数据内容，page_str 为页数

from django.utils.decorators import method_decorator

@method_decorator(auth,name="dispatch")         ##方法③
class order(views.View):

    #方法②
    # @method_decorator(auth)         ##因为会首先执行dispatch函数，如果这里不通过，下面的函数没法执行，所以可把装饰器放到这里
    # def dispatch(self, request, *args, **kwargs):
    #     return super(order,self).dispatch(self,request,*args,**kwargs)

    ##@method_decorator(auth)   方法①
    def get(self,request):
        v = request.COOKIES.get('uname')
        return (request,'index.html',{'current_user':v})

    def post(self,request):
        v = request.COOKIES.get('uname')
        return (request,'index.html',{'current_user':v})

 

装饰器函数

 

fbv

def auth(func):
    def inner(request,*args,**kwargs):
        v = request.COOKIES.get('uname')　　　　　　　　#获取cookies
        if not v:　　　　　　　　　　　　　　　　　　　　　　#验证cookies是否存在
            return redirect('/cmdb/login/')
        return func(request,*args,**kwargs)            ##这里return 函数加了括号表示执行了函数，不加括号不执行
    return inner

 

cbv

from django import views

from django.utils.decorators import method_decorator

@method_decorator(auth,name="dispatch")         ##方法③
class order(views.View):

    #方法②
    # @method_decorator(auth)         ##因为会首先执行dispatch函数，如果这里不通过，下面的函数没法执行，所以可把装饰器放到这里
    # def dispatch(self, request, *args, **kwargs):
    #     return super(order,self).dispatch(self,request,*args,**kwargs)

    ##@method_decorator(auth)   方法①
    def get(self,request):
        v = request.COOKIES.get('uname')
        return (request,'index.html',{'current_user':v})

    def post(self,request):
        v = request.COOKIES.get('uname')
        return (request,'index.html',{'current_user':v})