What is the best way to dynamically build and insert templatetags from data?

[Val Neekman]

What is the best way to dynamically build and insert templatetags from some data in settings.py

# .... in settings.py

DYN_TAGS = [

    {

        'name': 'foo',

        'data': {

             'code': 200,

             'says': 'Foo here',

        }

    },

    {

        'name': 'bar',

        'data': {

             'code': 401,

             'says': 'Bar here',

        }

    }

]

# ... in:  foobar_app/__init__.py

from django.conf import settings

for tag in settings.DYN_TAGS:

   # register tags

####### The above should be equal to #########

# if we had an app called foobar_app and it had a templatetags directory

# .... in:  foobar_app/templatetags/foo.py

  @register.assignment_tag(takes_context=True)

  def foo(context):

    return {'code': 200, 'says': 'Foo here'}

# .... in:  foobar_app/templatetags/bar.py

  @register.assignment_tag(takes_context=True)

  def bar(context):

    return {'code': 401, 'says': 'Bar here'}

Please note that the data is made up to help with the question.

Django 1.8+ answers would be great.

Thanks,

Val

[Bruno A.]

Hi,

From the doc https://docs.djangoproject.com/en/1.8/howto/custom-template-tags/#writing-custom-template-tags
Have you looked at registering one template tag with parameters? That seems to cover your example, but I appreciate it's probably much simpler than the actual use case.

Otherwise, the bit where you register your tags should, as I understand the docs, located in foobar_app/templatetags/dynamic_tags.py, next to a __init__.py.

And then the code should be something along the lines of:

from django import template
from django.conf import settings

register = template.Library()

for register in settings.DYN_TAGS:
    register.simple_tag(lambda : register['data'], name=register['name'], takes_context=True)

# In the templates:

    {% load dynamic_tags %}

    {% foo %}

I haven't tested it, but should be close enough. I would be curious on the things you try to do with that though.