Django 3 Web Development Cookbook - Fourth Edition

How to do it...

Perform the following steps to create the {% try_to_include %} template tag:

1. First, let's create the function parsing the template-tag arguments, as follows:

# myproject/apps/core/templatetags/utility_tags.pyfrom django import templatefrom django.template.loader import get_templateregister = template.Library()""" TAGS """@register.tagdef try_to_include(parser, token):    """    Usage: {% try_to_include "some_template.html" %}    This will fail silently if the template doesn't exist.    If it does exist, it will be rendered with the current context.    """    try:        tag_name, template_name = token.split_contents()    except ValueError:        tag_name = token.contents.split()[0]        raise template.TemplateSyntaxError(            f"{tag_name} tag requires a single argument" ...