Using django-widget-tweaks with Jinja2 template engine - django-forms

Question

I'm using django v1.11.7 with Jinja2 v2.10 as the template engine.
In my website, I wish to render forms using bootstrap. I found out that django-widget-tweaks can be used for this integration.
This package won't work with Jinja templates, since it needs to load a custom tag set into the Jinja environment. Loading tag sets can be complex, since I may need to write an extension.
Is there an easy way to get django-widget-tweaks to work with Jinja? Or is there another way for integrating boostrap with Jinja?

Answer 1

A little late but maybe this can help.
What I did is import the function I wanted to use and called them in my jinja templates:
app_root.jinja2.py
from jinja2 import Environment
from jinja2 import contextfunction
from widget_tweaks.templatetags.widget_tweaks import render_field
def environment(**options):
env = Environment(**options)
env.globals.update({
'render_field': render_field,
})
return env
In template
{% set class = class + "my-html-class" %}
{{ render_field(field, class) }}
EDIT: Anyone with a little bit of Jinja and template tag experience knows this won't work. For my current needs, I defined the two following function in my jinja config and will evaluate my needs at a later time.
def set_attr(bound_field, attr, value):
bound_field.field.widget.attrs[attr] = value
return bound_field
def add_class(bound_field, value):
try:
bound_field.field.widget.attrs['class'] += value
except KeyError:
bound_field.field.widget.attrs['class'] = value
return bound_field
EDIT 2
Other useful link: https://github.com/niwinz/django-jinja/issues/140
To make this solution work, I had to make these changes:
jinja2.py
from jinja2 import Environment
from widget_tweaks.templatetags.widget_tweaks import add_class
from widget_tweaks.templatetags.widget_tweaks import set_attr
def environment(**options):
env = Environment(**options)
env.filters['set_attr'] = set_attr
env.filters['add_class'] = add_class
return env
template.html
{{ form.field |set_attr('attr:val') }}
{{ form.field |add_class('my_class') }}