7+ Django 使い方 References

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Introduction to Django

Django is a free and open-source web framework written in Python. It is designed to help developers build complex, database-driven websites quickly and efficiently. Django is known for its ease of use, scalability, and security. With Django, you can create web applications that can handle high traffic and complex operations.

Getting Started with Django

To get started with Django, you will need to install Python and Django on your computer. You can download Python from the official website and Django from the Django website. Once you have installed Python and Django, you can create a new Django project by running the following command:

$ django-admin startproject projectname

This will create a new Django project with the name "projectname."

Creating a Django App

Django apps are the building blocks of a Django project. Each app is a self-contained module that contains models, views, and templates. To create a new app, you can run the following command:

$ python manage.py startapp appname

This will create a new app with the name "appname."

Creating Models

Models in Django are used to define the structure of the database tables. You can create a new model by defining a new class in the models.py file of your app. For example:

class Book(models.Model):
    title = models.CharField(max_length=200)
    author = models.CharField(max_length=200)
    published_date = models.DateField()

This model defines a database table for books, with three fields: title, author, and published_date.

Creating Views

Views in Django are used to handle requests and generate responses. You can create a new view by defining a new function in the views.py file of your app. For example:

def book_list(request):
books = Book.objects.all()
return render(request, 'book_list.html', {'books': books})

This view retrieves all the books from the database and renders them using the "book_list.html" template.

Creating Templates

Templates in Django are used to generate HTML pages. You can create a new template by defining a new HTML file in the templates directory of your app. For example, you can create a "book_list.html" file with the following content:

{% for book in books %}
{{ book.title }} by {{ book.author }}
{% endfor %}

This template displays a list of all the books retrieved by the "book_list" view.

Tips for Using Django

Use Django's Built-in Admin Interface

Django comes with a built-in admin interface that allows you to manage your database tables and data without writing any code. You can access the admin interface by adding "/admin" to the end of your website URL.

Use Django's Built-in Authentication System

Django also comes with a built-in authentication system that allows you to manage user accounts, passwords, and permissions. You can use this system to create login pages, registration pages, and user profiles.

Use Django's Built-in Security Features

Django is known for its strong security features. It comes with built-in protection against common security threats, such as SQL injection, cross-site scripting, and cross-site request forgery. You can also use third-party libraries to enhance the security of your Django applications.

Conclusion

Django is a powerful web framework that can help you build complex, database-driven websites quickly and efficiently. With its ease of use, scalability, and security features, Django is a popular choice among developers. By following the tips and techniques outlined in this tutorial, you can use Django to build robust web applications in 2023 and beyond.