#Django-Basic

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

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 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 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).

Django settings

• A Django settings file contains all the configuration of your Django installation.
• A settings file is just a Python module with module-level variables.

# setting example
ALLOWED_HOSTS = ['www.example.com']
DEBUG = False
DEFAULT_FROM_EMAIL = '[email protected]'

Django Migrations

• Migration in Django is to make changes to your models
• Like deleting, adding a field, etc. into your database schema.

Django Views

• A view is a place where we put our business logic of the application
• The view is a python function that takes a web request and returns a web response
• This response can be the HTML contents of a Web page, or a redirect, or a 404 error

Django Signal

• The Django Signals is a strategy to allow decoupled applications to get notified when certain events occur.
• There are two key elements in the signals machinery –> the senders and the receivers
• As the name suggests, the sender is the one responsible to dispatch a signal,
• And the receiver is the one who will receive this signal and then do something.