Django Apps – Build Better Web Apps with Django

In Django, an app is a self-contained set of models, views, and other code that provides a specific set of functionality to your Django project. Each app is designed to do one thing and do it well, and apps can be used in multiple projects.

For example, you might have an app that handles user authentication, another app that handles product listings, and another app that handles payment processing. This modular design makes it easy to reuse apps in different projects and to build new projects quickly by assembling a collection of pre-built apps.

Models, views, templates, template tags, static files, URLs, middleware, and other components are all included in applications. They are typically wired into projects via the INSTALLED APPS setting, with the option of adding additional components like URLconfs, the MIDDLEWARE setting, or template inheritance.

It’s critical to realise that a Django application is a collection of code that communicates with numerous framework components. A thing called an Application object doesn’t exist. However, there are a few instances when Django must communicate with already-installed programmes, primarily for configuration and introspection. Because of this, the application registry keeps metadata for each installed programme in a separate AppConfig instance.

There is no prohibition against a project package being viewed as an application as well and having models, etc. (which would need adding it).

To create a new app in the Django project, you can use the django-admin startapp command. This will create a new directory with the basic files and directories needed for a Django app, including a models.py file for defining your models, a views.py file for defining your views, and a tests.py file for writing unit tests.

Once you have created your app, you need to include it in the INSTALLED_APPS list in your Django project’s settings.py file. This will tell Django to include your app when it loads the project, and it will make the app’s models and views available to the rest of the project.

You can then use Django’s URL routing system to map specific URLs to views in your app, and use Django’s template system to render templates and display the app’s content to users.