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-rw-r--r--rest_framework/serializers.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 2ae7c215..1b044c5f 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -456,8 +456,11 @@ class ModelSerializer(Serializer):
"Serializer class '%s' is missing 'model' Meta option" % self.__class__.__name__
opts = get_concrete_model(cls)._meta
pk_field = opts.pk
- # while pk_field.rel:
- # pk_field = pk_field.rel.to._meta.pk
+
+ # If model is a child via multitable inheritance, use parent's pk
+ while isinstance(pk_field, models.OneToOneField) and pk_field.rel.parent_link:
+ pk_field = pk_field.rel.to._meta.pk
+
fields = [pk_field]
fields += [field for field in opts.fields if field.serialize]
fields += [field for field in opts.many_to_many if field.serialize]