Introduction to Django Framework
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Questions and Answers

What is the main advantage of using Django for web development?

  • It allows developers to focus on building web applications without worrying about the underlying complexity (correct)
  • It provides a simpler way to write complex SQL statements
  • It is a more popular framework compared to other Python frameworks
  • It is a framework specifically designed for building desktop applications

    • What is the acronym DRY stand for in the context of Django?

  • Do Risk Yourself
  • Develop Rapidly Yourself
  • Don't Repeat Yourself (correct)
  • Do Repeat Yourself

    • What is the primary function of the Model in Django's MVT design pattern?

  • To deliver data from the database as an Object Relational Mapping (ORM) (correct)
  • To handle the logic of the web application
  • To handle user requests and return the relevant template
  • To provide the layout of the web page and display the data

    • What is the common problem with using SQL to extract data from a database?

    <p>It requires a good understanding of the database structure to work with it effectively</p> Signup and view all the answers

    What is the typical location of the models in a Django project?

    <p>models.py</p> Signup and view all the answers

    What is the primary function of a view in Django?

    <p>To handle HTTP requests and return a final result</p> Signup and view all the answers

    What is the purpose of the urls.py file in Django?

    <p>To map URLs to views</p> Signup and view all the answers

    What is the name of the folder where templates are typically located?

    <p>templates</p> Signup and view all the answers

    What is the purpose of Django tags in templates?

    <p>To add logic to a web page</p> Signup and view all the answers

    In what year was Django first released to the public?

    <p>2005</p> Signup and view all the answers

    Study Notes

    What is Django?

    • Django is a Python framework that makes it easier to create web sites using Python.
    • It takes care of the difficult stuff, allowing you to concentrate on building your web applications.
    • Django emphasizes reusability of components, also referred to as DRY (Don't Repeat Yourself).
    • It comes with ready-to-use features like login system, database connection, and CRUD operations (Create Read Update Delete).

    Django's Design Pattern

    • Django follows the MVT (Model View Template) design pattern.
    • MVT pattern consists of:
      • Model: The data you want to present, usually from a database.
      • View: A request handler that returns the relevant template and content based on the request from the user.
      • Template: A text file (like an HTML file) containing the layout of the web page, with logic on how to display the data.

    Model

    • The model provides data from the database.
    • In Django, the data is delivered as an Object Relational Mapping (ORM), which is a technique designed to make it easier to work with databases.
    • ORM makes it easier to communicate with the database, without having to write complex SQL statements.
    • Models are usually located in a file called models.py.

    View

    • A view is a function or method that takes HTTP requests as arguments, imports the relevant model(s), and finds out what data to send to the template, and returns the final result.
    • Views are usually located in a file called views.py.

    Template

    • A template is a file where you describe how the result should be represented.
    • Templates are often .html files, with HTML code describing the layout of a web page, but can also be in other file formats to present other results.
    • Django uses standard HTML to describe the layout, but uses Django tags to add logic.

    URLs

    • Django provides a way to navigate around the different pages in a website.
    • When a user requests a URL, Django decides which view it will send it to.
    • This is done in a file called urls.py.

    How Django Works

    • When a browser requests a URL, Django receives the URL, checks the urls.py file, and calls the view that matches the URL.
    • The view checks for relevant models, imports them from the models.py file, and sends the data to a specified template in the template folder.
    • The template contains HTML and Django tags, and with the data, it returns finished HTML content back to the browser.

    Django History

    • Django was invented by Lawrence Journal-World in 2003, to meet the short deadlines in the newspaper and at the same time meeting the demands of experienced web developers.
    • The initial release to the public was in July 2005.
    • The latest version of Django is 4.0.3 (March 2022).

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    Learn about Django, a Python framework that simplifies web development. Understand its features, benefits, and how it works. Perfect for beginners!

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