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-rw-r--r--rest_framework/serializers.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 4210d058..5240dbf6 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -794,6 +794,8 @@ class ModelSerializer(Serializer):
# TODO: TypedChoiceField?
if model_field.flatchoices: # This ModelField contains choices
kwargs['choices'] = model_field.flatchoices
+ if model_field.null:
+ kwargs['empty'] = None
return ChoiceField(**kwargs)
# put this below the ChoiceField because min_value isn't a valid initializer