How to use conditional if statements in Jinja 2?

Question

So I am new to Django and can use some help. I have used a for loop to display a list from my database. But I want to add an if statement such that, if the user input matches my database item, only then it should be displayed. Take a look :

{%for inc in all_items%}
    <ul>                 
        {#I want to add an if statement here, if user input == inc_element#}
        <li><p>{{inc.item_name}}<p></li>
    </ul>
    <hr>
{%endfor%}

I know I 'd have to use HTML forums for taking user input. But how do I match it in if statement. Help would be appreciated.

Please accept an answer if your question has been answered. Anything else is rude. Thanks. — Marki
– Marki, Commented Jun 8, 2021 at 15:11

xyres · Accepted Answer · 2018-01-09 14:07:05Z

60

General conditional syntax is like this:

{% if some_variable == some_value %}
    {{ do_something }}
{% endif %}

Docs have some more examples.

answered Jan 9, 2018 at 14:07

xyres

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3 Comments

Arjun Kashyap Over a year ago

Do you know how I can store user input into jinja variable

xyres Over a year ago

@ArjunKashyap Just pass the user input value to the template context, just like you pass other variables.

gonczor Over a year ago

@ArjunKashyap This post has just showed up on my screen. It's been bumped because it's not marked as answered. I feel this answer has helped you so please mark it as accepted so that this post does not show up again and other posts without answers can show up.

Iuri Guilherme · Accepted Answer · 2023-10-08 12:45:15Z

8

Note: mess is a variable

Below code syntax for using 'for loop' and 'if statements' in Python Language together with Jinja in HTML file:

{% for mess in get_flashed_messages() %}
    {% if mess == "Your Dog's breed is rufus" %}
        {{mess}} 
    {% else %}
        {{"Don't you have any other breed?"}}
    {% endif %}      
{% endfor %}

And below is the code if your using Jinja with Bootstrap in HTML file:

{% for mess in get_flashed_messages() %}
    <div class="alert alert-warning alert-dismissible fade show" role="alert">
        {% if mess == "Your Dog's breed is rufus" %}
            {{mess}} 
        {% else %}
            {{"Don't you have any other breed?"}}
        {% endif %}      
        <button type="button" class="close" data-dismiss="alert" aria-label="Close">
            <span aria-hidden="true">&times;</span>
        </button>
    </div>
{% endfor %}

edited Oct 8, 2023 at 12:45

Iuri Guilherme

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answered Jul 31, 2020 at 5:52

Moosa Sharieff

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1 Comment

ryanwebjackson Over a year ago

FYI: You don't need curly brackets for a text literal. If you omit the quotes, the text will be the output for that portion of the template.

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