Django - 4 Steps With Mathfilter (smart free tips)

by Strativ
3MIN READ

21 October 2021

Django

Django is a Python-based free and open source web framework that follows the architectural pattern model-template-views (MTV). It is maintained by the Django Software Foundation (DSF), an independent non-profit organization established in the United States.

Främsta målet är att underlätta skapandet av komplexa, databasdrivna webbplatser. Ramverket betonar återanvändbarhet och “pluggbarhet” av komponenter, mindre kod, låg koppling, snabb utveckling och principen om att inte upprepa dig själv. Python används hela tiden, även för inställningar, filer och datamodeller. Django erbjuder också ett valfritt administrativt gränssnitt för att skapa, läsa, uppdatera och ta bort som genereras dynamiskt genom introspektion och konfigureras via admin -modeller.

A little history

Django was created in the fall of 2003, when web programmers at the magazine Lawrence Journal-World, Adrian Holovaty and Simon Willison, started using Python to build applications. Jacob Kaplan-Moss was hired early in the development shortly before Simon Willison's internship ended. It was released publicly under a BSD license in July 2005. The framework was named after guitarist Django Reinhardt. Adrian Holovaty is a Romanesque jazz guitarist and a big fan of him.

In June 2008, it was announced that a newly formed Django Software Foundation (DSF) would maintain the source code in the future.

Development tools with Django support

In order to develop a Django project does not require any special tools, as the source code can be edited with any conventional text editor. Nevertheless, editors specializing in computer programming can help increase productivity in development, e.g. with functions such as syntax selection. As it is written in Python, text editors who are aware of Python's syntax are beneficial in this regard.

Integrated Development Environments (IDEs) add additional features, such as troubleshooting, refactoring, and device testing. As with regular editors, Python-supported IDEs can be beneficial. In addition, some IDEs specializing in Python have integrated support for Django projects, so the use of such an IDE in developing such a project can further increase productivity.

4 stegsprocessen för Django mathfilters

Hi friends, I found an interesting knowledge to share with you regarding a feature in Django templates. I was able to run an MCQ program and found an arithmetic problem like in this application. I have asked 5 questions and for each question there are several choices. Among them, there is only one correct answer. So after participating in the test, you will be able to see a summary of the ongoing test field. For a better understanding, I provide the screenshots below.

As I mentioned earlier there are 5 questions and I gave 4 correct answers and the last one was incorrect. So in the wrong column the number should be 1 which is 5 - 4 = 1. But it shows 5 which is the total number of questions. Immediately after, I thought about solving it in the front end. And searched for whether Django templates can do this or not and found an unregistered tag library called django-mathfilters. This library can perform certain arithmetic operations in the template such as - subtraction, addition, multiplication, division, absolute value, modulo, integer (floor) division.

I show you here how to use it, with my example above which is 5 - 4 = 1.

Step 1: First we need to install it with this command

– pip install django-mathfilter

Step 2: In our project settings file we add this library in

INSTALLED_APPS.

Steg 3: We need to load the math filters at the top of our template which is one html -file.

Step 4: Now for subtraction we use the syntax “object1.value | sub: object2.value”. For addition it will be "| add:" instead of "| sub:".

Now in the wrong column the number of wrong answers is 1 which is true. And the task is complete.

That's all. I think it helps to save time sometimes. Hope to see you soon, tadaaa !!!

System development with Strativ

We at Strativ offer STRAtegic and innovaTIVe business relationships to our customers. Our mission is to equip our customers' businesses with digital solutions so that they become more competitive. You can read more about the projects we have done for our customers. You are also welcome to read more about tjservices we offer in the form of smart solutions, where Python and Django are used extensively in development.