Django

A django app that allows simple calculations in django forms. It provides a Django Widget that derives its value from a expression defined in the widget instance. It updates a field when any of the source fields change

• Add calculation to INSTALLED_APPS in project settings

Custom autocomplete fields for Django. A Django package that improves the user interface for select input fields by integrating the Select2 JavaScript library. It adds features like searching it's especially useful for handling large datasets and simplifies the integration of Select2 into Django projects with an easy-to-use form field and widget.

• Add django_select2 to INSTALLED_APPS in project settings
• Add django_select to URL root configuration : path("select2/", include("django_select2.urls"))

Install Bootstrap’s source Sass and JavaScript files via npm to get access to the source files, for customization and optimization of the website

The models module is essential for defining the structure of our database models. It provides a set of classes and fields to represent database tables and relationships.

The forms module is used for creating and handling forms in our application.

The datetime module is used for handling and manipulating date and time information.

The path function is used for defining URL patterns in our project. It helps in mapping URLs to views and handling routing within the application.

The render, redirect, and get_object_or_404 functions are used to simplify rendering templates, redirecting users, and handling 404 errors for model instances.

The Sum, ExpressionWraper, F and FloatField classes and functions are used for advanced database query operations. They allow us to perform aggregations, apply expressions, and work with numeric fields in our database queries.

The require_GET decorator in Django is used to ensure that a view can only be accessed via an HTTP GET request.

JsonResponse Django class that represents an HTTP response with a JSON-encoded content. It simplifies the process of returning JSON data from a Django view

import calculation is used in order to be able to use the django-calculation package for the calculations done in the forms

imports the forms module from the django_select2 package and assign it an alias s2forms. django_select2 enhances the standard Django select input fields by integrating the Select2 library. It adds a search input box to select fields, allowing users to easily search and select options.

sum is functionality that does the sum inside the view