2.Django-4.2博客开发教程:欢迎页面（三）2023-07-17

1.首先进入Python虚拟环境：

cmd 窗口cd 到项目下的 cd D:\git_lab\myblog\Scripts>，执行激活 activate

变成如下

(myblog) D:\git_lab\myblog\Scripts>

2.执行数据迁移：

首次会自动创建sql文件，创建数据库表。

(myblog) D:\git_lab\myblog>py manage.py makemigrations
System check identified some issues:

WARNINGS:
?: (staticfiles.W004) The directory 'D:\git_lab\myblog\static' in the STATICFILES_DIRS setting does not exist.
No changes detected

(myblog) D:\git_lab\myblog>py manage.py migrate
System check identified some issues:

WARNINGS:
?: (staticfiles.W004) The directory 'D:\git_lab\myblog\static' in the STATICFILES_DIRS setting does not exist.
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying admin.0003_logentry_add_action_flag_choices... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying auth.0009_alter_user_last_name_max_length... OK
  Applying auth.0010_alter_group_name_max_length... OK
  Applying auth.0011_update_proxy_permissions... OK
  Applying auth.0012_alter_user_first_name_max_length... OK
  Applying sessions.0001_initial... OK

(myblog) D:\git_lab\myblog>

3.创建管理帐号和密码

1	`python manage.py createsuperuser`

(myblog) D:\git_lab\myblog>python manage.py createsuperuser
System check identified some issues:

WARNINGS:
?: (staticfiles.W004) The directory 'D:\git_lab\myblog\static' in the STATICFILES_DIRS setting does not exist.
用户名 (leave blank to use 'administrator'): admin
电子邮件地址: admin@qq.com
Password:
Password (again):
密码长度太短。密码必须包含至少 8 个字符。
这个密码太常见了。
密码只包含数字。
Bypass password validation and create user anyway? [y/N]: y
Superuser created successfully.

4.启动服务

python manage.py runserver 127.0.0.1:8080 #指定IP和端口，然后通过浏览器访问这个地址

(myblog) D:\git_lab\myblog>python manage.py runserver 127.0.0.1:8080
Watching for file changes with StatReloader
Performing system checks...

System check identified some issues:

WARNINGS:
?: (staticfiles.W004) The directory 'D:\git_lab\myblog\static' in the STATICFILES_DIRS setting does not exist.

System check identified 1 issue (0 silenced).
July 17, 2023 - 17:29:20
Django version 4.2.3, using settings 'myblog.settings'
Starting development server at http://127.0.0.1:8080/
Quit the server with CTRL-BREAK.

上面访问成功是自带的，我们可以自己做一个欢迎页：

首先，打开打开bolg目录下的views.py文件，在里面输入：

myblog/blog/views.py
 
from django.http import HttpResponse 
 
def hello(request):
    return HttpResponse('hello！')

再打开myblog目录下的urls.py文件，在文件里添加两行代码：

myblog/myblog/urls.py
 
from django.contrib import admin
from django.urls import path
from blog import views         
urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.hello),   
]