DevOps技术

[TOC]
# 一、安装Django
(1)安装django命令
```bash
pip install django
```

# 二、命令行创建项目
执行命令创建项目
```bash
django-admin startproject 项目名称
```
如：
```bash
django-admin startproject mysite
```

# 四、命令行创建app
```bash
python manage.py startapp app名称
```
如：
```bash
python manage.py startapp app01
```

# 五、配置注册App
(1)首先找到apps.py文件，这里即 Proj_0112/app01/apps.py，比如这里内容如下：
```python
from django.apps import AppConfig

class App01Config(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'app01'

```
(2)然后在项目mysite/mysite/setting.py中注册
```bash
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app01.apps.App01Config',         # 增加此行
]
```
# 六、编写url和视图函数的对应关系
(1)编写项目目录下url.py文件，即mysite/mysite/urls.py
```python
from django.contrib import admin
from django.urls import path
from app01 import views         # 增加此行，从app01中导入views视图模块

urlpatterns = [
    # path('admin/', admin.site.urls),      # 注释掉默认的路由
    path('index/', views.index),            # 增加此行，即当访问 xxx.com/index 时，就会调用app01/views.py文件中的index函数
]

```
(2)到app01目录中views中定义视图函数index，即在 mysite/app01/views.py文件
```python
from django.http import HttpResponse
from django.shortcuts import render

# Create your views here.

def index(request):                                    # 定义index函数，默认传入request参数
    return HttpResponse("欢迎访问mysite")            # 返回 欢迎访问mysite 的内容

```

# 七、启动项目
(1)通过命令行启动
```bash
 $ python manage.py runserver
```
执行结果如下：
```bash
python manage.py runserver
Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).

You have 18 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
September 05, 2022 - 01:45:30
Django version 4.1, using settings 'mysite.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK
```
 # 八、页面访问
 浏览器页面访问 http://127.0.0.1:8000/index/ 即可得到如下结果：
 ![](http://blog.redrose2100.com/static/upload/20220904_174818.png)

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