一、FBV和CBV
FBV:是视图函数以函数的方式写逻辑代码
CBV:是视图以类的方式写逻辑代码

如CBV: views.py
from django.shortcuts import render,HttpResponse,redirect
from django.views import View
from django.views.decorators.csrf import csrf_exempt,csrf_protect
from django.utils.decorators import method_decorator
from app01 import models

class LoginView(View):
    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(LoginView, self).dispatch(request,*args,**kwargs)

    def get(self, request, *args, **kwargs):
        return render(request, 'login.html')

    def post(self,request, *args, **kwargs):
        user = request.POST.get('user')
        pwd = request.POST.get('pwd')
        obj = models.UserInfo.objects.filter(username=user,password=pwd).first()
        if obj:
            request.session['user_info'] = {'id': obj.id, 'username': obj.username}
            return redirect('/users.html')
        return render(request, 'login.html', {'msg': '去你的'})
        
如FBV: views.py
def register(request):
    if request.method == "GET":
        form = RegisterForm()
        return render(request, 'register.html', {'form': form})
    else:
        response = {'status': True, 'data': None, 'msg': None}
        form = RegisterForm(request.POST)
        if form.is_valid():
            print(form.cleaned_data)
        else:
            response['status'] = False
            response['msg'] = form.errors
        return HttpResponse(json.dumps(response))
        

二、form表单组建使用

 导入forms模块
from django.forms import Form
from django.forms import fields
from django.forms import widgets

#创建表单类
class UserForm(Form):
    username = fields.CharField(
        required=True,
        error_messages={'required': '用户名不能为空'},
        widget = widgets.TextInput(attrs={'class': 'form-control'})
    )
    password = fields.CharField(
        required=True,
        error_messages={'required': '邮箱不能为空', 'invalid': '邮箱格式错误'},
        widget = widgets.TextInput(attrs={'class': 'form-control'})
    )

    ut_id = fields.ChoiceField(
        choices = [],
        widget = widgets.Select(attrs={'class': 'form-control'})
    )

    role_id = fields.MultipleChoiceField(
        choices=[],
        widget=widgets.SelectMultiple(attrs={'class': 'form-control'})
    )

    def __init__(self, *args, **kwargs):
        super(UserForm,self).__init__(*args,**kwargs)
        self.fields['ut_id'].choices = models.UserType.objects.values_list('id','title')
        self.fields['role_id'].choices = models.Role.objects.values_list('id','caption')

注: username, password,渲染到页面是input标签属性的name值
fields.CharField表示输入文本类型，
fields.ChoiceField表示单选下拉框
fields.MultipleChoiceField表示多选下拉框
required=True表示必填选项
error_messages={'required': '用户名不能为空'}表示错误提示
widget = widgets.TextInput(attrs={'class': 'form-control'})表示增加class属性