Django错误:__init__()接受了1个位置参数，但给出了2个

Question

我是Django的新手，我正试图按照Udemy的教程创建我的第一个项目，但我遇到了这个错误。

我的项目有以下文件夹结构：

-演示

• __init__.py
• admin.py
• apps.py
• 型号.py
• 测试.py
• urls.py-视图.py

-第一个

• __init__.py
• asgi.py
• 设置.py
• urls.py
• wsgi.py

视图.py：

from django.shortcuts import render
from django.http import HttpRequest

def first(request):
return HttpRequest('1st message from views')

演示/urls.py：

from django.urls import path
from . import views
urlpatterns = [
path('', views.first),
]

第一个/urls.py：

from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('demo/', include('demo.urls')),
path('admin/', admin.site.urls),
]

两个__init__.py文件都为空

错误：

TypeError at /demo/
__init__() takes 1 positional argument but 2 were given
Request Method: GET
Request URL:    http://127.0.0.1:8000/demo/
Django Version: 3.2.16
Exception Type: TypeError
Exception Value:    
__init__() takes 1 positional argument but 2 were given
Exception Location: D:PythonDJANGOfirst-projectdemoviews.py, line 6, in first
Python Executable:  D:PythonDJANGOfirst-projectvenvScriptspython.exe
Python Version: 3.7.6
Python Path:    
['D:\Python\DJANGO\first-project',
'D:\Python\DJANGO\first-project',
'C:\Users\biavu\AppData\Local\Programs\Python\Python37\python37.zip',
'C:\Users\biavu\AppData\Local\Programs\Python\Python37\DLLs',
'C:\Users\biavu\AppData\Local\Programs\Python\Python37\lib',
'C:\Users\biavu\AppData\Local\Programs\Python\Python37',
'D:\Python\DJANGO\first-project\venv',
'D:\Python\DJANGO\first-project\venv\lib\site-packages']
Server time:    Thu, 06 Oct 2022 12:34:45 +0000

Answer 1

您需要返回一个HttpResponse，而不是HttpRequest。

请求是您作为输入获得的内容。

from django.http import HttpResponse
def first(request):
return HttpResponse('1st message from views')