one-one writable nested modelserializers

1 files changed, 10 insertions, 1 deletions

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 6aca2f57..26c34044 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -753,7 +753,16 @@ class ModelSerializer(Serializer):
 
         if getattr(obj, '_related_data', None):
             for accessor_name, related in obj._related_data.items():
-                setattr(obj, accessor_name, related)
+                if related is None:
+                    previous = getattr(obj, accessor_name, related)
+                    if previous:
+                        previous.delete()
+                elif isinstance(related, models.Model):
+                    fk_field = obj._meta.get_field_by_name(accessor_name)[0].field.name
+                    setattr(related, fk_field, obj)
+                    self.save_object(related)
+                else:
+                    setattr(obj, accessor_name, related)
             del(obj._related_data)