Creating a Django based Basic Web Application - Revision Notes

 CBSE Class 12 Computer Science (Python)

Creating a Django based Basic Web Application
Revision Notes

  • Some important points to remember are as follows:
  • A web framework is a software tool that provides a way to build and run dynamic websites and web-enabled applications.
  • An HTTP Get Request refers to a way of retrieving information from the given server using a given URL over web.
  • An HTTP POST request is a way to send data to the server, (e.g., data filled in an online form such as student information, file upload, etc.) using HTML forms over web.
  • DJANGO is a Python based free and open source web application framework.
  • Virtualenv is a useful tool which creates isolated Python environments that take care of interdependencies and let us develop different applications in isolation. Each isolated environment has different set of libraries unlike a common global set of libraries.
  • A Django project refers to an entire application and an app is a submodule of the project caters to one specific functionality.
  • You can create a Django project by issuing django-admin start <projectname> command.
  • There are two directories/folders created with the project name and one is a subfolder of the other.
  • The outer project name folder is the base directory of the project and holds all other app folder and setting modules of the project.
  • The inner project folder is the project web-application folder and holds all the setting modules for the project.
  • Command python manage.py startapp <appname> creates an app within a Django project.
  • Django project architecture is based on MTV (Model Template View) architecture. Earlier it was also known as MVC (Model View Controller) architecture.
  • Model in Django project is the data management component(s).
  • Template is responsible for presentation logic for a Django project.
  • View is the handling logic or business logic of a Django project that links the URLs and templates through URL routing.
  • Logic tier provided by Django framework is the controller.
  • Steps to create a Django project are:
    1. determine project and its apps
    2. determine for each app the http request type, model, template, view and url
    3. create model, template, views for the apps as per step
    4. and map urls to the templates through URL Configurations
    5. run server and test your project.
  • The mapping between URL path to the views of Django Project are called URL Confs (URL configurations). The views of Django project are python functions.
  • Django project views are Python functions that get HTTP request type in the form of mandatory argument request (HTTP request type).
  • URL Routing is a process of resolving and mapping URLs through URL Confs in urls.py to actual templates which can be displayed in the web browser as a web page.