第三单元 视图层

1. 修改数据在settings.py中

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'myapp',  # 注册子应用
]

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'HOST': '127.0.0.1',
        'PORT': 3306,
        'USER': 'root',
        'PASSWORD': '密码',
        'NAME': '库名'
    }
}

# 编译中文
LANGUAGE_CODE = 'zh-Hans'
TIME_ZONE = 'Asia/Shanghai'

# 静态视图
STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static')]

2. GET请求处理和POST请求处理

GET请求，用于获取数据

def get(self, request):
	return HttpResponse('请求成功')

POST请求，用于提交数据

def post(self, request):
    user1 = request.POST.get('zhangshan')
    pwd1 = request.POST.get('123')
    Users.objects.create(user=user1, pwd=pwd1)
    return HttpResponse('提交成功')

3. 三种响应方式

HttpResponse：直接发送一条数据

from django.http import HttpResponse
def Index(request):
	return HttpResponse('hello word')

render：响应一个页面

def Index(request):
	return render(request, 'index.html')

redirect：重定向

from django.shortcuts import redirect
def Index(request):
	return redirect('/index.html/')

4. 类视图

# 需要导入
from django.views import View
class IndexView(View):
	def get(self, request):
		return render('index.html')

配置路由

from myapp import views
urlpatterns = [
	path('indx/', views.IndexView.as_view())
]