How to call a Django function from template and save return in a variable

Question

Context:

I have a piece of HTML that I want to dispaly in the template just in case a function return "true".

Details:

My function

def show_avg_kpi():
    return config.avg_times_visible
register.filter('show_avg_kpi', show_avg_kpi)

Template ( is the piece of code to display or not):

{% if show_avg_kpi %}
  <HTML CODE>
{% endif %}

I want something like this, but I don't know how to save the result of the show_avg_kpi function in a variable to use it with the {% if %} tags

Thank you in advance.

are you using it everywhere in all templates or just in one template ? — Thierno Amadou Sow
– Thierno Amadou Sow, Commented Mar 7, 2022 at 13:00

Ignacio Villela · Accepted Answer · 2022-03-07 13:15:40Z

1

You can use register.simple_tag like this

@register.simple_tag
def show_avg_kpi():
    return config.avg_times_visible

and in your template like this

{% show_avg_kpi as your_var %}
{% if your_var %}
    your code
{% endif %}

Now show_avg_kpi will be called only once

answered Mar 7, 2022 at 13:15

Ignacio Villela

1507 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Augusto · Accepted Answer · 2022-03-07 13:16:17Z

1

I think you could use {% with %} tags. i.e:

{% with my_var=show_avg_kpi %} 
    {% if my_var=condition %}
        HTML CODE
    {% endif %}
{% endwith %}

But you can only use my_var inside the with statement.

Another approach is to send the variable from the view.

answered Mar 7, 2022 at 13:16

Augusto

915 bronze badges