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Override blocks in included templates

Project Description

django-embed-template

This package adds the {% embed %} templatetag. This tag combines the functionality of the include tag and the extends tag to allow for more flexible and extensible modular template usage. Inspired by twig’s embed tag, this tag lets you override blocks that were defined in the included template.

Requirements

This package is tested with Django 1.8, 1.9 and 1.10 and their respectively supported Python versions.

Installation

Simply get the package from pip:

pip install django-embed-template

Then make sure to add django_embed_template to your INSTALLED_APPS in your settings.py.

Usage

Unlike {% extends %}, the {% embed %} tag can be repeated in the template and does not have to occur as the first tag (essentially like the {% include %} tag). Likewise, {% embed %} inherits the context by default, and allows you to pass additional context using the with keyword. Passing only the explicitly listed variables can be achieved using the only keyword.

In many cases {% include %} simply suffices. However, in more complex scenarios it has a tendency to create an exponential number of combined templates. This typically happens when the content of the included template is itself dynamic. Consider the following example (inspired by twig’s documentation):

Assume we have some base.html that contains a content block. In this block, we want to create vertical and horizontal sub-blocks. Assume we have vertical.html that contains two boxes sides by side with respectively {% block A %} and {% block B %} inside, as well as horizontal.html containing three stacked boxes with similarly labeled blocks. Our page could then look something like this:

{% extends 'base.html' %}
{% block content %}
    {% embed 'vertical.html' %}
        {% block A %}Arthur, King of the Britons{% endblock %}
        {% block B %}Sir Lancelot{% endblock %}
    {% endembed %}
    {% embed 'horizontal.html' %}
        {% block A %}Sir Bedevere the Wise{% endblock %}
        {% block B %}Sir Robin the Not-Quite-So-Brave-as-Sir-Lancelot{% endblock %}
        {% block C %}
            Other knights:
            {% embed 'horizontal.html' with background='gray' %}
                {% block A %}Sir Galahad the Pure{% endblock %}
                {% block B %}Sir Not Appearing In This Film{% endblock %}
            {% endembed %}
        {% endblock %}
    {% endembed %}
{% endblock %}

Note that we’re also nesting {% embed %} blocks, leaving some blocks unspecified, as well as passing context to one of the embedded templates. For more possible scenarios, browse through the example templates.

License

This package includes code that was directly derived from code from the Django project. The included django-LICENSE applies to those snippets. The included CC0 license applies to the rest of this project.

django-embed-template Changelog

0.2.0 (2016-08-20)

  • Allow for nesting of embed tags.
  • Include a set of test cases and examples.
  • Fix compatability with Python 2 and Django 1.8+

0.1.2 (2016-08-10)

  • Fix packaging to actually include code.

0.1.1 (2016-07-31)

  • Fix embedding the same template more than once.

0.1.0 (2016-07-30)

  • Initial working prototype
Release History

Release History

This version
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0.2.0

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0.1.2

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0.1.1

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0.1.0

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