Custom Template Filters in Django
Django is a Python-based web framework that allows you to quickly create efficient web applications. It is also called batteries included framework because Django provides built-in features for everything including Django Admin Interface, default database – SQLlite3, etc.
What is filters in Django template language (DTL) ?
Before move to see the how to make custom filters in Django Template Language, let’s learn what is filters in Django.
- Filter is also the important feature of our template language.
- Filters are basically used to modify or filter your variables.
- You have to use this pipe ( | ) symbol to apply filter in any variables.
For example :-
So this filter will modify this variable value in lowercase
{{ variable_name | filter_name }}
How to create custom Template Filter in Django?
First of install create the django project using following command :-
django-admin startproject myproj
cd myproj
Then create the new app inside myproj
For Ubuntu
python3 manage.py startapp main
Add app name in settings.py inside INSTALLED_APPS
Add this view in your views.py
Python3
from django.shortcuts import render # Create your views here. def home(request): value="GEEKSFORGEEKS" return render(request,"home.html",{"value":value}) |
Now lets make the templatetags directory inside our main folder
and don’t forget to create __init__.py file inside templatetag directory
and then create lower_filter.py file
Python3
from django import template register = template.Library() @register.filter() def low(value): return value.lower() |
Create a directory in main directory add name it as templates
Inside the templates directory create a file and name it as home.html
HTML
<!DOCTYPE html> <html> <head> <title>Welcome To GFG</title> </head> <body> {% load lower_filter %} <h1>{{value|low}}</h1> </body> </html> |
Create a file in main directory and name it as urls.py
Python3
from django.urls import path from .views import * urlpatterns = [ path('', home,name="home"), ] |
myproj/urls.py
Python3
from django.contrib import admin from django.urls import path,include urlpatterns = [ path('admin/', admin.site.urls), path('',include("main.urls")) ] |
open cmd or terminal
For Ubuntu
python3 manage.py runserver
Output :-
Please Login to comment...