04.数据显示

//注册admin用户
python3 manage.py createsuperuser

//admin.py
//注册模型进admin后台，登录admin，刷新查看新增用户
from userapp.models import User
admin.site.register(User)


//用户显示属性
//models.py User Class 内声明方法
    def __str__(self):
        return self.nick


//读取数据库显示
//views.py
from userapp.models import User
def hello_db(request):
    peiqi = User.objects.all()[0]
    return HttpResponse("你好呀，%s"%(peiqi.nick))
    
//urls.py
from userapp import views
urlpatterns = [
    path('admin/', admin.site.urls),
    path('hello/', views.hello),
    path('hello2/',views.hello_db)
]