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Tag Reference

if, elif, & else

Use the if tag to evaluate if a variable is "true" and control the contents displayed.

{% if products_list > 2 %}
    <p>Number of products: {{ products_list|length }}</p>
{% elif products_list %}
    <p>We only have a single product now.</p>
{% else %}
    <p>Sorry, there are no products.</p>
{% endif %}

Boolean Operators

If tags may be used in combination with boolean operators for conditional control flow.

Operator Description
and multiple conditions are true
or either condition is true
not a condition is not true
in contained within
not in a condition is not true
is two values are the same
is not two values are not the same
== equality
!= inequality
< less than
> greater than
<= less than or equal to
>= greater than or equal to

for

Loops over each item in array, making the item available in a context variable. For example, to display a list of products provided in the {{ products }} variable.

<ul>
    {% for each in products %}
    <li>{{ each.get_title }} - Rating {{ each.rating }} stars</li>
    {% endfor %}
</ul>

extends & block

Extends and block tags allow you to define blocks of content in a base template that can be overridden by templates that extend from it.

layouts/base.html
<!DOCTYPE html>
<html lang="en">
<head>
    <link rel="stylesheet" href="{{ 'assets/style.css'|asset_url }}">
    <title>{% block title %}My amazing store{% endblock %}</title>
</head>

<body>
    <div id="sidebar">
        {% block sidebar %}
        <ul>
            <li><a href="/">Home</a></li>
            <li><a href="/blog/">Blog</a></li>
        </ul>
        {% endblock %}
    </div>

    <div id="content">
        {% block content %}{% endblock %}
    </div>
</body>
</html>
templates/blog.html
{% extends "layouts/base.html" %}
{% block title %}My Blog Post Title{% endblock %}
{% block sidebar %}
    <div class="sidebar">
        <h4>Custom Sidebar</h4>
    </div>
{% endblock %}
{% block content %}
    <h4>My Blog Post Title...</h4>
{% endblock %}

include

Loads a template and renders it with the current context. This is a way of including other templates within a template.

<html lang="en">
<body>
    {% include "partials/footer.html" %}
</body>
</html>

Warning

A word of caution, multi-level inclusion inside of iterative loops can create performance penalties while rendering a page html for site visitors. Use includes sparingly when working inside iterative loops.

url

Returns an absolute url path reference matching a given view with parameters. See the URL & Template Path reference for a list of all URL names to use with the {% url %} template tag.

<a href="{% url 'blog:blog-list' %}">Blog</a>

csrf_token

This tag is used for CSRF protection and required on any template with a form that sends a POST request to the back end.

<form>
    {% csrf_token %}
    <input type="text" id="example" name="Example Input">
    <input type="submit" value="Submit">
</form>

comment

Ignores everything between {% comment %} and {% endcomment %}. An optional note may be inserted in the first tag. For example, this is useful when commenting out code for documenting why the code was disabled.

<p>Rendered text with {{ pub_date|date:"c" }}</p>
{% comment "Optional note" %}
    <p>Commented out text with {{ create_date|date:"c" }}</p>
{% endcomment %}

image_thumbnail

The image_thumbnail tag is used to resize images dynamically in templates. The tag accepts arguments that control how the image is resized.

{% with image=line.product.primary_image %}
      {% image_thumbnail image.original "200x200" upscale=False as thumb %}
      <a href="{{ line.product.get_absolute_url }}">
         <img class="thumbnail" src="{{ thumb.url }}" alt="{{ product.get_title }}">
      </a>
{% endwith %}
Arguemnt Description
size Example, 100x100 (widthxheight), sets the desired image size in pixels. If width and height are given the image is rescaled to maximum values of height and width given. Aspect ratio preserved.
crop This option is only used if both width and height is given. Crop behaves much like css background-position. The image is first rescaled to minimum values of height and width given, this will be equivalent to the padding box in the above text.
upscale Upscale is a boolean and controls if the image can be upscaled or not. For example if your source is 100x100 and you request a thumbnail of size 200x200 and upscale is False this will return a thumbnail of size 100x100. If upscale was True this would result in a thumbnail size 200x200 (upscaled). The default value is True.
quality Quality is a value between 0-100 and controls the thumbnail write quality. Default value is 95.
progressive This controls whether to save jpeg thumbnails as progressive jpegs. Default value is True.
orientation This controls whether to orientate the resulting thumbnail with respect to the source EXIF tags for orientation. Default value is True.
format This controls the write format and thumbnail extension. Formats supported by the shipped engines are 'JPEG' and 'PNG'. Default value is JPEG.
padding Padding is a boolean and controls if the image should be padded to fit the specified geometry.

now

Displays the current date and/or time, using a format according to the given string. See available date reference for format options.

t

The t (translation) tag is used to display localized content from a theme's translations files. The t tag accepts a key and additional replacement variable arguments to access the theme translations and return the language appropriate string for display to the user.

{% t 'customer.orders.order_count' with count=orders.count %}

seo

The seo tag generates SEO meta data for products in standardized format for consumption by 3rd party systems.

{% seo %}
The tag is expected to be added to the top of product details template to generate necessary SEO meta data.

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