Posts

Django Models

• A Django model is the built-in feature that Django uses to create tables, their fields, and various constraints.
• Each model class maps to a single table in the database.
• Django Model is a subclass of django.db.models.Model and each field of the model class represents a database field (column).

# Topic covered
* Django default User Model
* Custom User Model
    * AbstractUser vs AbstractBaseUser
* Validating objects
    * full_clean()
    * Model.clean_fields()
    * Model.clean()
    * Model.validate_unique()

Django admin

• Django provides a default admin interface
• It can be used to perform create, read, update and delete (CURD) operations on the model directly.
• Provides a convenient interface to manage model data and visualize database

Django Architecture

• MVC vs MCT Architecture
• Both MVC and MVT are one of the famous design patterns
• They are used for many web application frameworks.
• It is an architectural pattern that separates an application into three main logical components

Django Introduction

1.1 What is Django?

• Django is a high-level web development framework
• Based on Python
• Free and open source
• Enables Web development to develop quickly and with ease
• Maintained by Django Software Foundation

1.1 𝗪𝗵𝗮𝘁 𝗵𝗮𝗽𝗽𝗲𝗻𝘀 𝘄𝗵𝗲𝗻 𝘆𝗼𝘂 𝘁𝘆𝗽𝗲 𝗮 𝗨𝗥𝗟 𝗶𝗻𝘁𝗼 𝘆𝗼𝘂𝗿 𝗯𝗿𝗼𝘄𝘀𝗲𝗿?

The process involves the browser, your computer’s operating system, your internet service provider, the server where you host the site, and services running on that server.

1. You type url.com in your browser
2. The browser looks up the IP address for the domain url.com
3. Then the browser initiate TCP connection with the server
4. The browser the sends the HTTP request to the server
5. The server processes the request and sends back a response
6. The browser then renders the content

Techniques for improving site performance

• Image optimization
• Serve static assets with an efficient cache policy
• Eliminate render-blocking resources
  • Remove unsued CSS and JS
  • Use defer and async for JS
• Compress JS and CSS
• HTTP/2 protocol is used instead of HTTP/1.1,

Intro to various optimization metrics

Why does speed matter?

• Performance plays a major role in the success of any online venture.
• High-performing sites engage and retain users better than low-performing ones.
• Performance has directly impacted the company's bottom line.

Chrome Dev-Tools

• Google Chrome Developer Tools Crash Course
• Inspect Network Activity
  • Video: Inspect Network Activity - Chrome DevTools 101
  • Network features reference
  • Filter requests by properties

Guide to Dual Boot Windows and Ubuntu

• This guide assumes you are installing Ubuntu 18.04 or later (64 bit version)
• This guide is an overview. It does not cover a lot of corner cases which often come up while doing the process.
• Also some points might be confusing to the new user.
• There are reference links to other resources which explain the steps in further detail. I highly recommend reading them.
• If your Windows is installed in legacy mode i.e. MBR(Master Boot Record) style partitioning, install Linux in legacy mode
• If your Windows is installed in UEFI mode i.e. GPT style hard disk partitioning, install Linux in UEFI mode