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Use Django to quickly build personal applications

WBOYOriginal: 2024-02-26 12:09:091203browse

Easily create your own applications with Django

Django is a Python framework for developing efficient web applications. It provides rich features and easy-to-use tools, allowing developers to quickly build powerful applications. This article explains how to create your own application using Django and provides some concrete code examples.

Installing Django

First, you need to install Django on your machine. You can use the pip tool that comes with Python to install it. Open a terminal or command prompt and enter the following command:

pip install django

This will automatically download and install the latest version of Django.

Create Django project

After installing Django, we can create a new Django project. Execute the following command on the terminal:

django-admin startproject myproject

This will create a directory called myproject and generate the initial Django project structure.

Create a Django application

Enter the myproject directory and execute the following command to create a new Django application:

python manage.py startapp myapp

This will create a new Django application named directory for myapp and generate the initial Django application structure.

Configure Django project

Next, we need to configure the Django project. Open the myproject/myproject/settings.py file and modify some parameters in it:

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

# ...

LANGUAGE_CODE = 'zh-hans'

# ...

TIME_ZONE = 'Asia/Shanghai'

Add 'myapp' in the INSTALLED_APPS list to add our application to the Django project. Modify LANGUAGE_CODE to 'zh-hans' to set the default language to Simplified Chinese. Modify TIME_ZONE to 'Asia/Shanghai' to set the default time zone to Shanghai.

Create a model

Model is one of the core concepts in Django, which is used to define the structure of data. Create a file named models.py in the myapp directory and define the model in it:

from django.db import models

class Article(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

The above code defines an Article model, which contains the title, content and creation time of the article.

Perform database migration

Django uses migration tools to manage database schema changes. Execute the following command on the terminal to create and apply the migration of the model:

python manage.py makemigrations
python manage.py migrate

This will automatically generate a migration file and apply the model to the database.

Create View

View is responsible for processing HTTP requests and returning responses. Create a file named views.py in the myapp directory and define the view in it:

from django.shortcuts import render
from django.http import HttpResponse
from .models import Article

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

The above code defines a view function named index, queries all articles, and renders the index through the render function .html template.

Create a template

The template is used to render the page. Create a directory named templates in the myapp directory and create a template file named index.html in it:

<!DOCTYPE html>
<html>
<head>
    <title>My Django App</title>
</head>
<body>
    <ul>
    {% for article in articles %}
        <li>{{ article.title }}</li>
    {% endfor %}
    </ul>
</body>
</html>

The above code defines an HTML page with a title and displays it through the template variable All article titles.

Configure URL routing

URL routing is used to map requests to the corresponding views. Open the myproject/myproject/urls.py file and modify the code in it:

from django.urls import include, path
from myapp import views

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

The above code maps the root URL to the index view.

Running Django Server

Run the following command to start the Django development server:

python manage.py runserver

Now, you can visit http://localhost in your browser :8000/ to see the titles of all articles displayed on the page.

Through the above steps, we successfully created a simple Django application and implemented the display of articles. Of course, this is only a small part of Django's capabilities, and there are more powerful features that can help us build more complex applications. I hope this article will help you understand and use Django!

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