Adding a custom filter to my (Jinja2) templates

[Andrew Todd]

Does anyone have any pointers or instructions for adding a custom filter [1] to my Jinja2 theme templates in Nikola?

I've done it in a Flask app but am not too sure how to go about it with a Nikola theme.

Thanks,
Andy

[1] http://jinja.pocoo.org/docs/api/#custom-filters

[Chris “Kwpolska” Warrick]

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I think the only way to do it would be very quirky, hacky and
generally unwanted: modify the Jinja2 plugin to include your filter.

However, this is a good point and it should be made easily
configurable: https://github.com/getnikola/nikola/issues/1038

I will handle this later today (or tomorrow).

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Chris “Kwpolska” Warrick <http://kwpolska.tk>
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[Andrew Todd]

Thanks, I see there is a commit next to the github issue that you created. I'll pull this in the next day or so and give it a try.

Andy

[Mitch Berkson]

I was not successful in adding a custom Jinja2 filter. I defined my filter function foo in plugins/filters.py. In conf.py, I put:

from plugins.filters import foo

JINJA_FILTERS = {'foo': foo}

But when I build, foo is not found when rendering the template. Am I missing a step?

[Chris Warrick]

On Mon, 1 May 2023 at 22:11, Mitch Berkson <mitc...@gmail.com> wrote:
>
> I was not successful in adding a custom Jinja2 filter. I defined my filter function foo in plugins/filters.py. In conf.py, I put:
> from plugins.filters import foo
>
> JINJA_FILTERS = {'foo': foo}
>
> But when I build, foo is not found when rendering the template. Am I missing a step?

The variable got renamed to TEMPLATE_FILTERS.

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Chris Warrick <https://chriswarrick.com/>
PGP: 5EAAEA16