Django--Learning and understanding

  1. Create a virtual environment in anaconda

  2. Installing Django

    复制代码
    pip install django

    Django is a Python web framework that provides many features such as ORM, authentication, forms, templates, etc. It can help you develop web applications faster and easier.

  3. Installing the DRF

    复制代码
    pip install djangorestframework

    DRF is a powerful and flexible Django-based RESTful framework that provides many tools and libraries to help you quickly develop web applications based on RESTful apis.

  4. Install Django-Filter

    复制代码
    pip install django-filter

    Description::Integration with DRF --- django-filter 23.2 documentation

    Django-filter is a Django-based library that provides a simple, flexible way to Filter sets of Django model queries. Django-Filter's API allows developers to use simple query expressions, build and apply complex filters, and select and exclude data in query sets.

    Djangos Filter provides a more elegant API specification through its integration with DRF Spectacular, which supports data filtering and querying as expressed by the OpenAPI specification.

  5. Installing Django Spectacular

    复制代码
    pip install drf_spectacular

    Description: DRF Spectacular is the OpenAPI specification tool for DRF. It automatically builds and generates OpenAPI specification documentation, and provides convenient API testing tools that make it easier to create, test, and maintain RESTful apis. It also supports integration with Django Filter, which allows you to filter query data by URL parameters.

Once django is installed, create a project using Django-admin, the tool that comes with Django:

复制代码
django-admin startproject django_news

Go to cd django_news.

复制代码
django_news
├── django_news              // 项目全局文件目录
│   ├── __init__.py
│   ├── settings.py          // 全局配置
│   ├── urls.py              // 全局路由
│   └── wsgi.py              // WSGI服务接口
└── manage.py                // 项目管理脚本

To run a Development Server using manage.py:

复制代码
python manage.py runserver

Implement custom apps

Let's create our first custom App, named news:

复制代码
python manage.py startapp news

The resulting news application folder structure looks like this:

复制代码
news                     // news 应用目录
├── __init__.py          // 初始化模块
├── admin.py             // 后台管理配置
├── apps.py              // 应用配置
├── migrations           // 数据库迁移文件目录
│   └── __init__.py      // 数据库迁移初始化模块
├── models.py            // 数据模型
├── tests.py             // 单元测试
└── views.py             // 视图

The view function you just wrote needs to be accessible to the system. So first implement the routing table of the sub-application news and create the news/urls.py file as follows:

复制代码
from django.urls import path
from . import views
urlpatterns = [
    path('', views.index, name='index'),
]

Implement the first Django template

Let's implement our first Django template. Create a templates directory in the news directory, then create a news directory in the templates directory, and then create the index.html file in the inner news directory:

复制代码
mkdir -p news/templates/news
touch news/templates/news/index.html

Because Djangos template lookup mechanism collects all the templates in the application together, if two template names conflict, one of the templates will not be accessible correctly. If it is placed in the news subfolder, it can be accessed through news/index.html, and conflicts are avoided through the namespace mechanism.

The code for the template is as follows:

复制代码
{% if news_list %}
  <ul>
  {% for elem in news_list %}
    <li>
      <h3>{{ elem.title }}</h3>
      <p>{{ elem.content }}</p>
    </li>
  {% endfor %}
  </ul>
{% else %}
  <p>暂无新闻</p>
{% endif %}

Once defined, run the following command to create the migration file:

复制代码
python manage.py makemigrations

The news/migrations/0001_initial.py migration script was successfully automatically created. Then proceed to the database migration:

复制代码
python manage.py migrate

After the database migration is complete, create a super user for logging in to the background management.

复制代码
python manage.py createsuperuser

Enter the user name and password as prompted. Interview localhost:8000/admin,Enter the login page of the background system:

Configure the background management interface

We did not implement the background management interface for the news application. Enter the following code in news/admin.py:

Enter the background management system again, you can see the news application and Post model created just now.

Adds a data query to the view

Finally, we add the code to the view to query from the database:

复制代码
from django.shortcuts import render

from .models import Post


def index(request):
    context = { 'news_list': Post.objects.all() }
    return render(request, 'news/index.html', context=context)

Reference article

https://zhuanlan.zhihu.com/p/98788776

相关推荐
Mintopia15 分钟前
🇨🇳 Next.js 在国内场景下的使用分析与实践指南
前端·后端·全栈
程序员三明治1 小时前
Spring AOP:注解配置与XML配置双实战
java·后端·spring·代理模式·aop·1024程序员节
绝无仅有1 小时前
京东面试题解析:同步方法、线程池、Spring、Dubbo、消息队列、Redis等
后端·面试·github
非凡ghost1 小时前
Tenorshare 4DDiG(数据恢复软件) 最新版
前端·javascript·后端
来一杯龙舌兰1 小时前
【Sentinel】Springboot整合Sentinel、Socket进行熔断限流(生产级熔断限流)
spring boot·后端·sentinel·熔断限流
绝无仅有1 小时前
京东面试题解析:String与StringBuilder的区别、装箱拆箱、重载与重写总结
后端·面试·github
非凡ghost1 小时前
WinMute(自动锁屏静音软件) 中文绿色版
前端·javascript·后端
離離原上譜2 小时前
python-docx 安装与快速入门
python·word·python-docx·自动化办公·1024程序员节
JuicyActiveGilbert2 小时前
【Python进阶】第2篇:单元测试
开发语言·windows·python·单元测试
今天没ID2 小时前
Numpy加权平均数
python