init order_by

tof/managers.py

@@ -3,7 +3,9 @@
 # @Date:   2019-11-17 15:02:55
 # @Last Modified by:   MaxST
 # @Last Modified time: 2019-11-19 16:40:49
+from django.contrib.contenttypes.models import ContentType
 from django.db import models
+from django.utils.translation import get_language
 
 from .decorators import tof_filter, tof_prefetch
 
@@ -21,6 +23,30 @@ def exclude(self, *args, **kwargs):
     def get(self, *args, **kwargs):
         return super().get(*args, **kwargs)
 
+    @tof_filter  # noqa
+    def order_by(self, *field_names):
+        """Return annotate for  """
+        from tof.models import Translation
+
+        params = []
+        for param in field_names:
+            field_name = param
+            desc = ''
+
+            if field_name.startswith('-'):
+                desc = '-'
+                field_name = param[1:]
+
+            self = self.annotate(**{f'_{field_name}': Translation.objects.filter(
+                lang__iso=get_language(), field__name=field_name, object_id=models.OuterRef('pk'),
+                content_type=ContentType.objects.get(model=self.model._meta.model_name,
+                                                     app_label=self.model._meta.app_label)
+            ).values_list('value', flat=True)})
+
+            # not finished, breaks down ordering by fields without any translation
+            params.append(f'{desc}_{field_name}')
+        return super().order_by(*params)
+
 
 class TranslationsQuerySet(DecoratedMixIn, models.QuerySet):
     pass