from the documentation:
read_only Set this to True to ensure that the field is used when serializing a representation, but is not used when updating an instance during deserialization.
Defaults to False
required Normally an error will be raised if a field is not supplied during deserialization. Set to false if this field is not required to be present during deserialization.
Defaults to True.
So I have a model which has a field that's not nullable but I want it to be populated in the pre_save method, so I have set the field to required=False
in serializer, but doesn't seem to work. I am still getting error when saving the record.
class FavoriteListSerializer(serializers.ModelSerializer):
owner = serializers.IntegerField(required=False)
class Meta:
model = models.FavoriteList
Update:
I have added serializer_class = serializers.FavoriteListSerializer
to the ViewSet, now instead of getting This field is required
, which I think got past the validation but then I am getting This field cannot be null.
I have checked the pre_save method is not being executed, any ideas?
Yeah, I ran into this issue at some point as well. You need to also update the validation exclusions.
class FavoriteListSerializer(serializers.ModelSerializer):
owner = serializers.IntegerField(required=False)
class Meta:
model = models.FavoriteList
def get_validation_exclusions(self):
exclusions = super(FavoriteListSerializer, self).get_validation_exclusions()
return exclusions + ['owner']