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Django Programming Implementation Guide: The latest technology in Python web application development

王林

Jun 23, 2023 am 08:56 AM

pythondjangoweb application

For developers who want to learn Python web application development, Django is undoubtedly one of the best choices. Django is an open source web framework based on Python, mainly used for web application development, providing an efficient, flexible, safe and scalable programming model. This article will introduce some of the latest technologies and techniques to help developers better master Django programming implementation.

Part 1: Establishing the Django environment

First, we need to establish the Django environment. Download and install the latest version of Python and then install Django using the following commands.

pip install Django

On the Windows platform, you can use the following command to create a Django project.

django-admin startproject projectname

On the Linux platform, you can use the following command to create a Django project.

django-admin.py startproject projectname

Part 2: Creating Django Applications

A Django project can contain multiple applications. Use the following command to create a Django application named myapp.

python manage.py startapp myapp

After creation, we need to add myapp to the INSTALLED_APPS list in the settings.py file.

# settings.py
...
INSTALLED_APPS = [
    ...
    'myapp',
]
...

Part 3: Creating the Model

Django uses Object Relational Mapping (ORM) to manage the database. We can use models to define data tables and fields. Creating a model is very simple.

# models.py
from django.db import models

class Article(models.Model):
    title = models.CharField(max_length=200)
    content = models.TextField()
    pub_date = models.DateTimeField(auto_now_add=True)

If we use the database migration tool, then we need to run the following command.

python manage.py makemigrations
python manage.py migrate

Part 4: Creating View Functions

View functions are the key to handling requests in Django applications. We can define a view function using the following way.

# views.py
from django.http import HttpResponse
from .models import Article

def article_list(request):
    articles = Article.objects.all()
    return HttpResponse(articles)

Part 5: Create URL routing

URL routing determines which view function the request will be processed by. We can define URL routes using the following way.

# urls.py
from django.urls import path
from .views import article_list

urlpatterns = [
    path('articles/', article_list),
]

Part 6: Create a template

A template is an HTML file used to display data. We can define a template using the following methods.

<!-- article_list.html -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Article List</title>
</head>
<body>
    <ul>
        {% for article in articles %}
        <li>{{ article.title }}</li>
        {% endfor %}
    </ul>
</body>
</html>

Part 7: Rendering data using templates

Loading and rendering templates in view functions is a common method. We can use the following way to render data using templates.

# views.py
from django.shortcuts import render
from .models import Article

def article_list(request):
    articles = Article.objects.all()
    return render(request, 'article_list.html', {'articles': articles})

Run the application

At this point, we have completed the development of the Django application, and now we can try to start the application and see the effect.

Use the following command to start the Django application.

python manage.py runserver

Now that we have understood the basics of Django programming, we can start trying other more advanced technologies and techniques.

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