How to concatenate strings in django templates

Question

I want to concatenate a string in a Django template tag, like:

{% extend shop/shop_name/base.html %}

Here shop_name is my variable and I want to concatenate this with rest of path.

Suppose I have shop_name=example.com and I want result to extend shop/example.com/base.html.

Answer 1

Hello @kartik,

Don't use add for strings, you should define a custom tag like this :

Create a file : <appname>\templatetags\<appname>_extras.py

from django import template

register = template.Library()

@register.filter
def addstr(arg1, arg2):
    """concatenate arg1 & arg2"""
    return str(arg1) + str(arg2)

and then use it as:

{% load <appname>_extras %}

{% with "shop/"|addstr:shop_name|addstr:"/base.html" as template %}
    {% include template %}
{% endwith %}

Hope this is helpfUll!!

Thank You!!