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jingo 0.4

An adapter for using Jinja2 templates with Django.

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.. _jingo:
.. module:: jingo

=====
Jingo
=====

Jingo is an adapter for using Jinja2_ templates within Django.

.. note:: Coffin or Jingo?

    Jingo differs from Coffin_ in two major ways:

    * Jingo serves purely as a minimalistic bridge between Django and Jinja2_.
      Coffin_ attempts to reduce the differences between Jinja2_ templates
      and Django's native templates.

    * Jingo has a far supperior name, as it is a portmanteau of 'Jinja' and
      Django.

    .. _Coffin: https://github.com/coffin/coffin/
    .. _Jinja2: http://jinja.pocoo.org/2/


.. _usage:

Usage
-----

When configured properly (see Settings_ below) you can render Jinja2_ templates in
your view the same way you'd render Django templates::

    from django.shortcuts import render


    def MyView(request):
        # TODO: Do something.
        context = dict(user_ids=[1, 2, 3, 4])
        render('users/search.html', context)

..note::

    Not only does ``django.shorcuts.render`` work, but so does any method that
    Django provides to render templates.

.. _settings:

Settings
--------

You'll want to use Django to use jingo's template loader.
In ``settings.py``::

    TEMPLATE_LOADERS = (
        'jingo.Loader',
        'django.template.loaders.filesystem.Loader',
        'django.template.loaders.app_directories.Loader',
    )

This will let you use ``django.shortcuts.render`` or
``django.shortcuts.render_to_response``.

And finally you may have apps that do not use Jinja2, these must be excluded
from the loader::

    JINGO_EXCLUDE_APPS = ('debug_toolbar',)

If a template is in the *app folder*, ``debug_toolbar``, the Jinja loader will
raise a ``TemplateDoesNotExist`` exception.
This causes Django to move onto the next loader in ``TEMPLATE_LOADERS``
to find a template - in this case,
``django.template.loaders.filesystem.Loader``.

If you want to configure the Jinja environment, use ``JINJA_CONFIG`` in
``settings.py``.  It can be a dict or a function that returns a dict. ::

    JINJA_CONFIG = {'autoescape': False}

or ::

    def JINJA_CONFIG():
        return {'the_answer': 41 + 1}


Template Helpers
----------------

Instead of template tags, Jinja encourages you to add functions and filters to
the templating environment.  In ``jingo``, we call these helpers.  When the
Jinja environment is initialized, ``jingo`` will try to open a ``helpers.py``
file from every app in ``INSTALLED_APPS``.  Two decorators are provided to ease
the environment extension:

.. function:: jingo.register.filter

    Adds the decorated function to Jinja's filter library.

.. function:: jingo.register.function

    Adds the decorated function to Jinja's global namespace.


.. highlight:: jinja

Default Helpers
~~~~~~~~~~~~~~~

Helpers are available in all templates automatically, without any extra
loading.

.. automodule:: jingo.helpers
    :members:


Template Environment
--------------------

A single Jinja ``Environment`` is created for use in all templates.  This is
available as ``jingo.env`` if you need to work with the ``Environment``.


Localization
------------

Since we all love L10n, let's see what it looks like in Jinja templates::

    <h2>{{ _('Reviews for {0}')|f(addon.name) }}</h2>

The simple way is to use the familiar underscore and string within a ``{{ }}``
moustache block.  ``f`` is an interpolation filter documented below.  Sphinx
could create a link if I knew how to do that.

The other method uses Jinja's ``trans`` tag::

        {% trans user=review.user|user_link, date=review.created|datetime %}
          by {{ user }} on {{ date }}
        {% endtrans %}

``trans`` is nice when you have a lot of text or want to inject some variables
directly.  Both methods are useful, pick the one that makes you happy.


Testing
-------

Testing is handle via fabric::

    fab test


.. seealso:
    The full documentation is available at http://jinja.rtfd.org/ or in the
    docs/ folder.
 
File Type Py Version Uploaded on Size # downloads
jingo-0.4.tar.gz (md5) Source 2011-10-28 6KB 748