url ----> 函数 FBV
url ----> 类 CBV
尝试将FBV的登录功能改写成CBV方式，体会CBV的基础流程：
def login(request): msg = '' if request.method == 'POST': username = request.POST.get('username', None) password = request.POST.get('password', None) verify = Administrator.objects.filter(username=username, password=password).exists() if verify : # 登录成功 request.session['is_login'] = True request.session['username'] = username return redirect(reverse('show_class')) else: msg = '用户名或密码错误' return render(request, 'studentandclass/login.html', {'msg': msg}) from django.views import View 最简单的使用方式：使用TemplateView 直接渲染一个模板文件：
from django.conf.urls import url from django.views.generic import TemplateView urlpatterns = [ url(r'^about/$', TemplateView.as_view(template_name="about.html")), ] 基础视图：
View ------------------- 所有类视图的基类
TemplateView --------------渲染一个template
RedirectView ----------------重定向类视图
通用显示视图：
DetailView ---------------展示单个object
ListView ------------------展示多个object
通用编辑视图：
FormView -------------- 显示一个form表单
CreateView ------------ 创建一个对象
UpdateView ------------更新对象
DeleteView --------------删除对象
常用mixins。
ContextMixin --------------- 用来设置上下文
TemplateResponseMixin -------------------- 渲染模板
SingleObjectMixin ------------------------------ 用来查找单个object
SingleObjectTemplateResponseMixin ------------------- 将单个object渲染到模板中
MultipleObjectMixin -------------------------------- 用来查找多个object
MultipleObjectTemplateResponseMixin --------------------- 将多个object渲染到模板中
在最基础View中使用form表单：
from django.http import HttpResponseRedirect from django.shortcuts import render from django.views import View from .forms import MyForm class MyFormView(View): form_class = MyForm initial = {'key': 'value'} template_name = 'form_template.html' def get(self, request, *args, **kwargs): form = self.form_class(initial=self.initial) return render(request, self.template_name, {'form': form}) def post(self, request, *args, **kwargs): form = self.form_class(request.POST) if form.is_valid(): # <process form cleaned data> return HttpResponseRedirect('/success/') return render(request, self.template_name, {'form': form})使用FormView:
要点：
template_name 指定需要将form表单渲染到哪个页面
form_class 指定该视图使用哪个form表单
success_url 指定form校验成功之后要跳转的路径
forms.py from django import forms class ContactForm(forms.Form): name = forms.CharField() message = forms.CharField(widget=forms.Textarea) def send_email(self): # send email using the self.cleaned_data dictionary pass views.py from myapp.forms import ContactForm from django.views.generic.edit import FormView class ContactView(FormView): template_name = 'contact.html' form_class = ContactForm success_url = '/thanks/' def form_valid(self, form): # This method is called when valid form data has been POSTed. # It should return an HttpResponse. form.send_email() return super(ContactView, self).form_valid(form)在类视图中使用modelform只需要指定fields或者form_class即可，Django会为我们自动生成modelform。
如modelform中有些数据需要额外添加，可在通用编辑视图类中重写form_valid方法，比如：
from django.views.generic.edit import CreateView from myapp.models import Author class AuthorCreate(CreateView): model = Author fields = ['name'] def form_valid(self, form): form.instance.created_by = self.request.user return super(AuthorCreate, self).form_valid(form)