Django Programming: Latest Practices in Python Web Application Development

With the popularity of the Internet, the demand for Web applications is also growing day by day. Developing a high-quality Web application has become one of the goals of many companies, teams, and developers. Currently, Python is receiving more and more attention as an efficient, concise, easy-to-learn and easy-to-use programming language. The Django framework provides an efficient and easy-to-use solution for Python web application development. This article will introduce the basic features, latest practices and application scenarios of the Django framework.

1. Introduction to Django framework

Django is a Python-based web application framework that adopts the MVC (Model-View-Controller) design pattern. It has powerful database operation support, template engine, URL routing design, automated form processing and many other functions, which can help developers quickly build high-quality and efficient Web applications. At present, Django has become one of the main frameworks for Python web application development and has been widely used and recognized.

2. The latest practices of Django framework

2.1. Quickly build Web applications

In the Django framework, developers can quickly build web applications through simple command line operations. Build a web application. The specific steps are as follows:

1. Install the Django framework:

pip install Django

2. Create a new project:

django-admin startproject myproject

3. Create a new application in the project:

cd myproject
python manage.py startapp myapp

4. Run the test server:

python manage.py runserver

After the above steps are completed, Django will automatically create a basic web application and start a test server locally. At this time, developers only need to add corresponding front-end code and business logic such as HTML, CSS, and JavaScript to the code.

2.2. Flexible URL routing design

The Django framework provides a flexible and easy-to-understand URL routing design. Developers can easily match the specified URL and route it to the corresponding view function. . The specific steps are as follows:

1. Write the view function in myapp/views.py:

from django.http import HttpResponse

def index(request):
    return HttpResponse("Hello, world!")

2. Create the urls.py file under myapp:

from django.urls import path
from . import views

urlpatterns = [
    path('', views.index, name='index'),
]

3. Introduce myapp.urls.py into myproject/urls.py:

from django.contrib import admin
from django.urls import include, path

urlpatterns = [
    path('myapp/', include('myapp.urls')),
    path('admin/', admin.site.urls),
]

After completing the above steps, visit http://localhost:8000/myapp/that is You can see the output of the string "Hello, world!".

2.3. Easily operate the database

The Django framework provides built-in ORM (Object-Relational Mapping) tools to allow developers to easily operate the database. By defining models (Models), Django can automatically create corresponding database tables for us and provide convenient APIs for CRUD (Create, Read, Update, Delete) operations. The specific steps are as follows:

1. Define the model in myapp/models.py:

from django.db import models

class Book(models.Model):
    name = models.CharField(max_length=100)
    author = models.CharField(max_length=50)

2. Create the corresponding table in the database:

python manage.py migrate

3. Write the view function in myapp/views.py:

from django.http import HttpResponse
from .models import Book

def index(request):
    book = Book(name="Python入门教程", author="Tom")
    book.save()
    return HttpResponse("Add a book to the database!")

After completing the above steps, visit http://localhost:8000/myapp/ to copy a book Add to database.

3. Application scenarios of Django framework

The Django framework is very suitable for the development of small and medium-sized web applications. The following are several common application scenarios:

3.1. Blog website

The Django framework has rich model definition, form verification, image upload, caching, SEO and other functions, which is very suitable for development Blog site.

3.2. Social Network

The Django framework provides complete user authentication, permission management, friend relationships, private messages and other functions, which is very suitable for developing social network applications.

3.3. E-commerce website

The Django framework provides complete payment, logistics, order management and other functions, and is very suitable for developing e-commerce websites.

Summary:

The powerful functions and easy-to-use features of the Django framework make it one of the preferred frameworks for Python web application development. Through the latest practice, this article shows readers the basic features and application scenarios of the Django framework. After mastering the Django framework, developers can build high-quality web applications quickly and efficiently.

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