Django Multilingual Deep Space 9

Django-multilingual-DS9 is a branch of django-multilingual, forked from django-multilingual-ng, with restructured core.

This project is not longer maintained. Recommended replacement is django-modeltranslation.

Requirements:

• Django 1.6
• Django 1.4 and 1.5 are supported by version 0.4.

Django-multilingual-ds9 does not have to be fully compatible with django-multilingual-ng, but basic features should not differ.

Usage

Define models

from django.db import models

from multilingual import MultilingualModel

class MyModel(MultilingualModel):
    # Fields without language versions
    data_field = models.IntegerField()

    class Translation:
        # Fields with language versions
        name = models.CharField(max_length=100)

Add to administration

from django.contrib.admin import site
from multilingual import MultilingualModelAdmin

from myapp.models import MyModel

site.register(MyModel, MultilingualModelAdmin)

Use in views and templates

e = MyModel.objects.create()
# Get translation for current language
e.name
# Get translation with fallback
e.name_any
# Get translation instance
e.translation
e.translation_en

# Get all translation instances
e.translations.all()

# Filter objects by translation field
qs = MyModel.objects.filter(name='some')
# Returns objects with no translation and objects with missing name translation
qs = MyModel.objects.filter(name__isnull=True)
# The values_list may also contain several None objects if translations are missing
qs = MyModel.objects.values_list('name', flat=True)

# Get object with translation in one query
MyModel.objects.select_related('translation').get(pk=1)
# Get objects with missing translation
MyModel.objects.filter(translation__isnull=True)

# Change current language
from django.utils.translation import activate
activate('cs')

# Force usage of specific language in multilingual code
from multilingual import language
language.lock('cs')
language.release()

Features

• Use only language codes from LANGUAGES setting.
• Model structure
  • FIELD_NAME returns translation of field for current language or None if no translation exists.
  • FIELD_NAME_any returns translation of field for current language or fallback language or default language or None if neither translation exists. Fallback language codes are only those with two letters and are used only if available in LANGUAGES setting.
  • FIELD_NAME_LANGUAGE_CODE returns translation of field for the language or None if the translation doesn't exist.
  • translation returns translation instance for current language or None if no translation exists.
  • translation_LANGUAGE_CODE returns translation instance for the language or None if the translation doesn't exist.
  • RELATED_NAME (default: translations) returns manager for translation model with filter to master object.
• Queries
  • get/filter/exclude(FIELD_NAME=value) and get/filter/exclude(FIELD_NAME_LANGUAGE_CODE=value) filters the result using multilingual field for current or specified language. Take care if you are using isnull=True lookup, because the query returns objects with missing translations as well as objects with None in multilingual field.
  • order_by/values/values_list(FIELD_NAME) and order_by/values/values_list(FIELD_NAME_LANGUAGE_CODE) works as well. Remember that these will keep objects with no translation in result set unless you filter them out.
  • select_related('translation') and select_related('translation_LANGUAGE_CODE') retrieves translation data from query.
  • get/filter/exclude(RELATED_NAME) selection by existence and parameters of translation objects.

Known bugs

• Administration
  • search_fields does not handle FIELD_NAME_LANGCODE, you need to use regular foreign key lookup RELATED_NAME__FIELD_NAME