Gain insights into Django, a Python framework for rapid web development. Discover hands-on learning with interactive widgets and build a portfolio-worthy Django project.

django-docker.tar.gz

Django

Project

Models

ProjectModels

ProjectModels-challenge 1

ProjectModels-challenge 2

Django is a free and open-source web application framework written in Python. It is used for rapid web development and clean, pragmatic design. It is built by experienced developers to make repetitive tasks easier, so you can focus on writing apps instead of reinventing the wheel. This course teaches Django for beginning and intermediate level learners. The course includes a hands-on learning experience with the help of interactive widgets. At the end of the course, you will have created a project in Django that can be used in your portfolio.

Django: Python Web Development Unleashed

## Solution
> **NOTE:** Remember that we used the `about` view to create instances of `Song` and `Playlist`. Therefore, we must visit the `/about` route before retrieving records.


React

Dart

GoJS React

Typescript React

Vue.js

## Explanation

- **At line #37**, we are retrieving all of the playlists in the `home` view. These playlists will be passed to the template to render the playlist menu.

- **At line #72**, in the `playlist` view, we are retrieving the playlist corresponding to the `id` passed in the URL by using the `get()` function. The parameter `pk` stands for the primary key in the `get()` function. For more information, check out the [Django documentation](https://docs.djangoproject.com/en/3.0/topics/db/queries/#retrieving-a-single-object-with-get).


- **At line #79**, we are retrieving all the songs from the database.

- **At line #81**, we are iteratively displaying the songs in the playlist that we just retrieved.

> **Test Yourself:**  In this solution, we fetched all songs from the database and checked each one to see if it belonged to the required playlist. We already had this logic coded when we were using the dictionaries, so we did not change it. However, this method is very inefficient. Django has provided us with many different methods to create efficient queries. Your task is to find out, on your own, how to write an efficient query for this scenario. Feel free to discuss your answers in the Discuss forum thread (the link can be found in the header of the lesson).


# Solution
> **NOTE:** Remember that we used the `about` view to create instances of `Song` and `Playlist`. Therefore, we must visit the `/about` route before retrieving records.


# Explanation

- **At line #37**, we are retrieving all of the playlists in the `home` view. These playlists will be passed to the template to render the playlist menu.

- **At line #72**, in the `playlist` view, we are retrieving the playlist corresponding to the `id` passed in the URL by using the `get()` function. The parameter `pk` stands for the primary key in the `get()` function. For more information, check out the [Django documentation](https://docs.djangoproject.com/en/3.0/topics/db/queries/#retrieving-a-single-object-with-get).


- **At line #79**, we are retrieving all the songs from the database.

- **At line #81**, we are iteratively displaying the songs in the playlist that we just retrieved.

> **Test Yourself:**  In this solution, we fetched all songs from the database and checked each one to see if it belonged to the required playlist. We already had this logic coded when we were using the dictionaries, so we did not change it. However, this method is very inefficient. Django has provided us with many different methods to create efficient queries. Your task is to find out, on your own, how to write an efficient query for this scenario. Feel free to discuss your answers in the Discuss forum thread (the link can be found in the header of the lesson).


Let's review the solution for how to retrieve and render songs and playlists.

Before Getting Started

Introduction to Django

First Django Application

Templates in Django

Static Files in Django

Laying Ground for Songs Playlist Application

Project Solution: Laying Grounds for Songs Playlist Application

Django Models

Django Forms

Operations on Models

Take Your Playlist to the Next Level

Project Solution: Take Your Playlist to the Next Level

Conclusion

Creating an E-learning Website Using Django

Project Solution: Retrieving Songs and Playlists

Solution

Explanation