Why you should use Django to develop web applications


Django is a high-level web framework in Python that allows users to easily build web applications quickly with minimal code. The Django framework follows the Model-View-Controller (MVC) design pattern. This configuration facilitates the development of complex database-based web applications. Through these design patterns, Django emphasizes the reuse of components. It also follows the principle of not repeating (DRY), which reduces repetition in software through abstraction and standardization of data to avoid redundant code.

Django can be used in a variety of web applications, including customer relationship management (CRM) systems, social media applications, online marketplaces, on-demand delivery applications, and many more. Many familiar web apps are currently using Django, including Instagram, Dropbox, Spotify, and Mozilla, among others. As you might suspect from its widespread use, the MVC design pattern enables rapid development, scalability, and security in web applications.

Model View Controller

MVC is a popular software design template for designing web applications. It uses three interconnected components to separate the internal representations of information from how that information is displayed to a user.

Model

The first element, the model, is the main component of the MVC design model. It serves as a dynamic data structure for the web application and is independent of the user interface. The model is also responsible for the data management as well as the logic of the web application. In practice, this structure corresponds to the way the web application processes raw data as well as the essential components of the application. For example, if you were to create an application that tracks your runs, the model class would define a “Run” class with the corresponding class attributes such as kilometers, pace, time, calories, altitude, frequency. heart rate and date.

In the context of Django, a model is a Python class where each attribute represents a database field. In our example, the miles, pace, time, calories, altitude, heart rate, and date attributes are all fields in a database that the model class would define and interact with. The structure of an execution class in Django would look like this:

Image: Screenshot

The “Run” class is an abstraction of the details of a run. This is useful because it distills the details of an execution into a list that is most relevant to the user. A comprehensive description of a run may include information that may not be relevant to the user. For example, in addition to reporting race distance in miles, distance can be reported in feet, kilometers, and yards. However, this additional information is not essential for the user. The class allows you to simplify a run only in terms of essential attributes such as kilometers, pace, time, calories, altitude, heart rate, and date attributes.

The model element also allows you to normalize the data, which helps avoid redundancies and anomalies. Redundancy occurs when a database contains the same information in separate locations. For example, if an address field is present in more than one location, any update to an address must be made in each location. This makes the database prone to errors and may result in unreliable / insignificant information. Because the model elements in Django are well defined, they prevent data from being duplicated and kept in multiple places. DjangoThe data normalization features also prevent several types of anomalies. For example, it prevents insertion anomalies, where data cannot be inserted due to the absence of other data. It also prevents deletion anomalies, which stops accidental data loss due to deletion of other data.

Additionally, model elements in Django focus on building simple, loosely coupled web components. Loose coupling in an application means that its parts do not strongly depend on each other. Loosely coupling web components makes life easier for the developer because they can easily add new features, update existing features, and fix bugs without having to rewrite a significant amount of code. This translates into faster software updates and a better overall user experience.

See

The view code is made up of all the functions in direct contact with the user. These functions are responsible for making things enjoyable (UI) and determining how the user interacts with the application (UX). Views lets you specify how you want each page to look. In our runtime application, you can specify consistent or specific elements such as background colors, text font, navigation bars, and footers on each page.

Controller

Controller code links models to views. In practice, this is like taking user input at the view level and deciding what to do with it in models. In the example runtime application, the controller would take raw data from user input at the view level and use the “Execute” model class to structure the contents of the runtime. With this in mind, the controller maintains the order of presentation in the view and updates the model database with new data.

Scalability

In today’s technology landscape, you need to consider scalability when building a web application. While the number of users of a new app can start out small, developers need to be properly prepared for growth. As your user base grows, so does the number of active visitors and server requests. Django makes scaling easy because it allows you to gradually increase your user base. It has loosely coupled components, which makes it easier to debug bottlenecks. For example, using the SQLite3 database, which does not scale well for larger user numbers, instead of the MySQL or Postgres database, is a very common source of problems. Fortunately, Django allows you to easily migrate data from SQLite3 databases to more powerful databases like MySQL or Postgres by modifying just two to three lines of code. To prove its usefulness in scaling, just look at the list of companies that use it, including Spotify, Instagram, and YouTube.

Django specifically supports horizontal scaling, which involves spawning multiple machines to serve smaller portions of the total number of requests. For example, if you have 5,000 requests, instead of processing them on one machine, you can process 500 requests each on 10 different machines. Django is useful here because its features allow you to run your application completely stateless, which means the server does not store information from one session for future use in another session.

Statelessness allows you to scale applications, reduce the complexity of REST APIs, and easily cache query results. In Django, you can enable statelessness by modifying it to store data on a remote database, instead of storing data on the default database. The key here is that Django makes running your app on many remote machines easy and straightforward, allowing the app to run statelessly. This is because each new session is independent of customer data from previous sessions, eliminating any state-dependent issues that may arise. With these features, applications built with Django can scale seamlessly from 500 to 500,000 users.

Security

Another cool thing about Django is that it comes with a lot of built-in and free security features. One of the protections provided by Django is against cross-site scripting (XSS), thus protecting the user’s browser. Django also protects against cross-site request forgery (CSRF), which prevents attackers from performing actions using another user’s credentials without that user’s knowledge or consent. Finally, Django protects against SQL injection, which stops the deletion or leakage of unauthorized data.

Django also has a lot more built-in protections than other popular frameworks. For example, Flask is another popular web framework that relies on third-party software for the same protections. This puts more pressure on the software development team to monitor security by making sure third-party software is up to date. Since Django comes with most of the protections built in for free, it’s much easier to secure your apps up front and monitor security for the lifetime of the app. If you want to know more, you can read Django’s security documentation, Security in Django.

Django used: Instagram

Now that we’ve seen some of the benefits of Django, let’s take a look at a specific instance of its application in practice. The quality of Instagram’s user experience and service is largely due to the fact that much of its core functionality is written in Django. For example, Instagram uses the Django Sentry app to report errors. This allows Instagram developers to diagnose bugs, modify code, and optimize the performance of app components. Instagram is also built on a Django tool called Dynostats, which also lets you monitor the efficiency of app components. Using Dynostats, developers can monitor user requests, application responses, application latency, and more. This makes it easy for developers to identify the causes of an application slowing down and find solutions faster.

Put Django at your service

Following the MVP design principle, the Django framework enables rapid development, scalability, and security in web applications. Django’s modular model architecture makes it easy to update / maintain specific components of your web applications, while safely leaving other components unchanged. Django allows businesses to not only quickly develop web components for their applications, but also quickly make small changes to increasingly complex code. In addition, Django prevents the most common security vulnerabilities, resulting in additional development time savings. Overall, Django is a fantastic web framework that takes away much of the hassle of building a web application by enabling rapid development through MVP design, ensuring security, and enabling scalability.

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