Django框架基础知识14-类视图

MTV

view视图

wsgi函数

def index(request):

....

return HttpResponse()

特定的HTTP方法.get,post可以定义单独的方法

继承,多继承,代码分解成可以复用的组件

在urls.py中定义调用类视图

path('index/', views.IndexView.as_view(), name='index'),#类视图的调用,注意加括号

类视图的写法

class IndexView(View):
    def get(self,request):
        num = request.COOKIES.get('num', None)
​
        if num:
            num = int(num) + 1
        else:
            num = 1
        response = render(request, 'teacher/index.html', context={
            'num': num
        })
        response.set_cookie('num', str(num))
        return response

通用类视图

在student_list.html中定义如下

{% for student in object_lsit %}
​
    <p>{{ student }}</p>

object_list是listview默认的变量

类视图权限装饰器:

在urls.settings里面装饰

项目实践,看文档

from django.contrib.auth.decorators import login_required

在url中套上login_required.

path('newstudent/',login_required(views.StudentListView.as_view()),name='StudentLV'),

或者这样

class IndexView(View):
    @method_decorator(login_required)
    def get(self,request):

@method_decorator(login_required,name='dispatch')
class StudentListView(ListView):
    template_name = 'teacher/students_list.html'
    model = Students
    context_object_name = 'students'
    paginate_by = 3
    section = '学生列表'
​
    # @method_decorator(login_required)
    # def dispatch(self, request, *args, **kwargs):   #颁发装饰
    #     return super().dispatch(*args,**kwargs)