templates django   0   2319
Creating custom template tags in Django

Sometimes existing templates tags are not enough for rebellious developers. They need to create custom template tags to use.

In this article, we are discussing step by step process to create and use custom template tags in Django.



Template Tags:

If all the tags are related to the app then bundle them inside that app, otherwise, you may create a new app and then add the newly created app to INSTALLED_APPS.


Steps to create custom template tags:
  • Create a new directory inside your app and name it 'templatetags'.
  • Create the __init__.py  file inside this newly created directory.
  • Create tags file. Lets name is custom_template_tag.py.
  • Import template.
  • All the tags should be registered to template.library instance.
  • For registering tags, create a module level variable, lets name it library. So on the top of file, after import statements write register = template.library() .
  • Now let's create a very simple tag to get a random number in the template. For this, you need to import randint.
  • write code to generate a random number and register that function with the library. The complete code should look like below.

from django import template
from random import randint


register = template.Library()


@register.simple_tag
def random_number():
    return randint(0,999)
 


How to use a custom tag in Django templates:

Now when we have created a custom tag and registered it with the library, we can use it in templates.

Load the tag class in your template before using any template. {% load custom_template_tags %}

Now use custom tag anywhere in your HTML. {% random_number %} .

This will print a random number at the same place. you can store the output of tag in some variable can use to anywhere in the template. {% random_number as rnd %}. Now anywhere in template use {{rnd}} .



Things to take care of to make custom tags work:

  • Make sure you restarted the development server.
  • The directory name must be templatetags.
  • __init__.py  must be present in the directory.
  • App, where the templatetags directory is created, must be present in installed apps.
  • Load the tag file in the template file where the tag will be used. Loading file in parent template and then expecting it would be available to all child templates, would not work. Because zen of python.
  • If tag still not working, remove all .pyc  files.
 

If it is still not working for you, please comment.

templates django   0   2319

Related Articles:
Preventing cross-site scripting attack on your Django website
XSS attack in Django, preventing cross-site scripting attack in Django website, avoid XSS in Django application, Enabling SECURE_BROWSER_XSS_FILTER in Django website, blocking cross-site scripting attach on Django website...
Encryption-Decryption in Python Django
How to encrypt and decrypt the content in DJango. Encrypting the critical information in Django App. Encrypting username, email and password in Django...
Solving Django Error: TemplateDoesNotExist at /app_name/
How to solve TemplateDoesNotExist error in Django projects, reason for TemplateDoesNotExist error in Django, fixing TemplateDoesNotExist error in Django...
How to host Django app on Pythonanywhere for Free
How to host any python-Django app on pythonanywhere server for free, Best hosting service provider for python-Django apps, Free Django app hosting, Easiest Hosting for Django, Django hosting for free, Cheapest Django Hosting...

0 thoughts on 'Creating Custom Template Tags In Django'
Leave a comment:


*All Fields are mandatory. **Email Id will not be published publicly.


SUBSCRIBE
Please subscribe to get the latest articles in your mailbox.


Recent Posts:






© pythoncircle.com 2018-2019
Contact Us: code108labs [at] gmail.com
Address: 3747 Smithfield Avenue, Houston, Texas