Custom Template Filters in Django
Last Updated :
01 Feb, 2021
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 :-
