fix news update

apps/news/serializers.py

@@ -379,6 +379,30 @@ class NewsBackOfficeDetailSerializer(NewsBackOfficeBaseSerializer,
                      'duplicates',
                  )
 
+        def validate(self, attrs):
+            """Overridden validate method."""
+            if 'descriptions' in attrs:
+                descriptions = attrs.pop('descriptions')
+                locales = list(map(lambda x: x['locale'], descriptions))
+                status_to_bool = {
+                    'active': True,
+                    'inactive': False,
+                }
+                attrs['slugs'] = {obj['locale']: obj['slug'] for obj in descriptions if 'slug' in obj}
+                attrs['title'] = {obj['locale']: obj['title'] for obj in descriptions if 'title' in obj}
+                attrs['locale_to_description_is_active'] = {
+                    obj['locale']: status_to_bool[obj['status']] for obj in descriptions
+                }
+                attrs['description'] = {obj['locale']: obj['text'] for obj in descriptions if 'text' in obj}
+                if self.context['request'].method == 'PATCH':
+                    instance = models.News.objects.get(pk=self.context['request'].data['id'])
+                    for key in ['slugs', 'title', 'locale_to_description_is_active', 'description']:
+                        for locale in locales:
+                            if not attrs[key].get(locale):
+                                attrs[key][locale] = getattr(instance, key).get(locale)
+
+            return attrs
+
 
 class NewsBackOfficeGallerySerializer(serializers.ModelSerializer):
     """Serializer class for model NewsGallery."""