django-localized-fields
=======================

``django-localized-fields`` is an implementation of a field class for Django models that allows the field's value to be set in multiple languages. It does this by utilizing the ``hstore`` type (PostgreSQL specific), which is available as ``models.HStoreField`` in Django 1.10.

* [Usage](#usage)
    * [Basic usage](#basic-usage)
    * [Constraints](#constraints)
    * [Other fields](#other-fields)
* [Installation](#installation)

Usage
-----

Basic usage
^^^^^^^^^^^
Declare fields on your model as ``LocalizedField``:

.. code-block:: python

     from django.db import models
     from localized_fields.fields import LocalizedField


     class MyModel(models.Model):
         title = LocalizedField()


During migration, the field type will be changed to ``hstore``. From now on you can store multi-language content in this field:

.. code-block:: python

     new = MyModel()
     new.title.en = 'english title'
     new.title.nl = 'dutch title'
     new.title.ro = 'romanian title'
     new.save()

``django-localized-fields`` integrates with Django's i18n system, in order for certain languages to be available you have to correctly configure the ``LANGUAGES`` and ``LANGUAGE_CODE`` settings:

.. code-block:: python

     LANGUAGE_CODE = 'en' # default language
     LANGUAGEs = (
          ('en', 'English'),
          ('nl', 'Dutch'),
          ('ro', 'Romanian')
     )

By changing the active language you can control which language is presented:

.. code-block:: python

     from django.utils import translation

     translation.activate('nl')
     print(new.title) # prints 'dutch title'

     translation.activate('en')
     print(new.title) # prints 'english title'

Or get it in a specific language:

.. code-block:: python

     print(new.title.get('en')) # prints 'english title'
     print(new.title.get('ro')) # prints 'romanian title'
     print(new.title.get()) # whatever language is the currently active one

You can also explicitly set a value in a certain language:

.. code-block:: python

     new.title.set('en', 'other english title')
     new.title.set('nl', 'other dutch title')

     new.title.ro = 'other romanian title'

Constraints
^^^^^^^^^^
By default, the following constraints apply to a ``LocalizedField``:

* Only the default language is ``required``. The other languages are optional and can be ``NULL``.
* If ``null=True`` is specified on the ``LocalizedField``, then none of the languages are required.

At the moment it is *not* possible to specifically instruct ``LocalizedField`` to mark certain languages as required or optional.

Other fields
^^^^^^^^^^^
Besides ``LocalizedField``, there's also:

* ``LocalizedAutoSlugField``
     Automatically creates a slug for every language from the specified field. Depends upon:
          * django-autoslug

     Currently only supports `populate_from`. Example usage:

          .. code-block:: python

              from django.db import models
              from localized_fields.fields import (LocalizedField,
                                                   LocalizedAutoSlugField)

              class MyModel(models.Model):
                   title = LocalizedField()
                   slug = LocalizedAutoSlugField(populate_from='title')

* ``LocalizedBleachField``
     Automatically bleaches the content of the field.
          * django-bleach

     Example usage:

           .. code-block:: python

              from django.db import models
              from localized_fields.fields import (LocalizedField,
                                                   LocalizedBleachField)

              class MyModel(models.Model):
                   title = LocalizedField()
                   description = LocalizedBleachField()

Installation
------------
1. Install the package from PyPi:

    .. code-block:: bash

        $ pip install django-localized-fields

2. Add ``localized_fields`` to your ``INSTALLED_APPS``:

     .. code-block:: bash

        INSTALLED_APPS = [
            ....

            'localized_fields'
        ]

You're good to go! Happy hacking!