Make document language choices a configurable list. Issue #137.

To override the default list of 600+ languages add a configuration entry to your settings/local.py like so:
DOCUMENTS_LANGUAGE_CHOICES = [('eng', 'English'), ('deu', 'German')]

to make the list translatable import ugettext_lazy and enclose the language name with _():

from django.utils.translation import ugettext_lazy as _
DOCUMENTS_LANGUAGE_CHOICES = [('eng', _('English')), ('deu', _('German'))]

mayan/apps/documents/literals.py

@@ -1,5 +1,3 @@
-import pycountry
-
 PICTURE_ERROR_SMALL = u'picture_error.png'
 PICTURE_ERROR_MEDIUM = u'1297211435_error.png'
 PICTURE_UNKNOWN_SMALL = u'1299549572_unknown2.png'
@@ -7,6 +5,4 @@ PICTURE_UNKNOWN_MEDIUM = u'1299549805_unknown.png'
 
 DEFAULT_ZIP_FILENAME = u'document_bundle.zip'
 
-LANGUAGE_CHOICES = [(i.bibliographic, i.name) for i in list(pycountry.languages)]
-
 DOCUMENT_IMAGE_TASK_TIMEOUT = 20

mayan/apps/documents/models.py

@@ -32,12 +32,11 @@ from mimetype.api import get_mimetype
 
 from .events import event_document_create
 from .exceptions import NewDocumentVersionNotAllowed
-from .literals import LANGUAGE_CHOICES
 from .managers import (DocumentManager, DocumentPageTransformationManager,
                        DocumentTypeManager, RecentDocumentManager)
 from .runtime import storage_backend
-from .settings import (CACHE_PATH, DISPLAY_SIZE, LANGUAGE, ZOOM_MAX_LEVEL,
-                       ZOOM_MIN_LEVEL)
+from .settings import (CACHE_PATH, DISPLAY_SIZE, LANGUAGE, LANGUAGE_CHOICES,
+                       ZOOM_MAX_LEVEL, ZOOM_MIN_LEVEL)
 from .signals import post_version_upload, post_document_type_change
 
 HASH_FUNCTION = lambda x: hashlib.sha256(x).hexdigest()  # document image cache name hash function

mayan/apps/documents/serializers.py

@@ -2,9 +2,9 @@ from __future__ import absolute_import
 
 from rest_framework import serializers
 
-from .literals import LANGUAGE_CHOICES
 from .models import (Document, DocumentVersion, DocumentPage, DocumentType,
                      RecentDocument)
+from .settings import LANGUAGE_CHOICES
 
 
 class DocumentPageSerializer(serializers.HyperlinkedModelSerializer):

mayan/apps/documents/settings.py

@@ -1,12 +1,15 @@
 """Configuration options for the documents app"""
 
 import os
+import pycountry
 
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 from smart_settings.api import register_settings
 
+LANGUAGE_CHOICES = [(i.bibliographic, i.name) for i in list(pycountry.languages)]
+
 register_settings(
     namespace=u'documents',
     module=u'documents.settings',
@@ -27,5 +30,6 @@ register_settings(
         #
         {'name': u'CACHE_PATH', 'global_name': u'DOCUMENTS_CACHE_PATH', 'default': os.path.join(settings.MEDIA_ROOT, 'image_cache'), 'exists': True},
         {'name': u'LANGUAGE', 'global_name': u'DOCUMENTS_LANGUAGE', 'default': u'eng', 'description': _('Default documents language (in ISO639-2 format).')},
+        {'name': u'LANGUAGE_CHOICES', 'global_name': u'DOCUMENTS_LANGUAGE_CHOICES', 'default': LANGUAGE_CHOICES, 'description': _('List of supported document languages.')},
     ]
 )