using a fallback language for translation

apps/search_indexes/filters.py

@@ -1,7 +1,7 @@
 """Search indexes filters."""
 from elasticsearch_dsl.query import Q
 from django_elasticsearch_dsl_drf.filter_backends import SearchFilterBackend
-from utils.models import get_current_language
+from utils.models import get_current_locale
 
 
 class CustomSearchFilterBackend(SearchFilterBackend):
@@ -12,7 +12,7 @@ class CustomSearchFilterBackend(SearchFilterBackend):
         field_name = field
         if hasattr(view,  'search_fields') and hasattr(view, 'translated_search_fields'):
             if field in view.translated_search_fields:
-                field_name = f'{field}.{get_current_language()}'
+                field_name = f'{field}.{get_current_locale()}'
         return field_name
 
     def construct_search(self, request, view):

apps/search_indexes/utils.py

@@ -1,6 +1,6 @@
 """Search indexes utils."""
 from django_elasticsearch_dsl import fields
-from utils.models import get_current_language
+from utils.models import get_current_locale, get_default_locale
 
 
 # object field properties
@@ -19,4 +19,8 @@ def get_translated_value(value):
         field_dict = value.to_dict()
     elif isinstance(value, dict):
         field_dict = value
-    return field_dict.get(get_current_language())
+    value = field_dict.get(get_current_locale())
+    # fallback
+    if value is None:
+        value = field_dict.get(get_default_locale())
+    return value

apps/utils/models.py

@@ -10,6 +10,7 @@ from django.contrib.postgres.fields.jsonb import KeyTextTransform
 from django.utils import timezone
 from django.utils.html import mark_safe
 from django.utils.translation import ugettext_lazy as _, get_language
+from configuration.models import TranslationSettings
 from easy_thumbnails.fields import ThumbnailerImageField
 from sorl.thumbnail import get_thumbnail
 from sorl.thumbnail.fields import ImageField as SORLImageField
@@ -59,13 +60,26 @@ def to_locale(language):
         return language + '-' + country
 
 
+def get_current_locale():
+    """Get current language."""
+    return to_locale(get_language())
+
+
+def get_default_locale():
+    return TranslationSettings.get_solo().default_language or \
+           settings.FALLBACK_LOCALE
+
+
 def translate_field(self, field_name):
     def translate(self):
         field = getattr(self, field_name)
         if isinstance(field, dict):
-            return field.get(to_locale(get_language()))
+            value = field.get(to_locale(get_language()))
+            # fallback
+            if value is None:
+                value = field.get(get_default_locale())
+            return value
         return None
-
     return translate
 
 
@@ -111,15 +125,10 @@ class TranslatedFieldsMixin:
         if self.STR_FIELD_NAME:
             field = getattr(self, getattr(self, 'STR_FIELD_NAME'))
             if isinstance(field, dict):
-                value = field.get(get_current_language())
+                value = field.get(get_current_locale())
         return value if value else super(TranslatedFieldsMixin, self).__str__()
 
 
-def get_current_language():
-    """Get current language."""
-    return to_locale(get_language())
-
-
 class OAuthProjectMixin:
     """OAuth2 mixin for project GM"""
 

project/settings/base.py

@@ -488,3 +488,5 @@ MEDIA_LOCATION = 'media'
 
 PHONENUMBER_DB_FORMAT = 'NATIONAL'
 PHONENUMBER_DEFAULT_REGION = "FR"
+
+FALLBACK_LOCALE = 'en-GB'