KeyError: How to exclude certain parts when a part of the serializer is empty

Question

I have this piece in my serializer which is using a nested serializer field. When i try to submit my form it will return a KeyError if I don’t add anything inside "assigned facilities". I tried adding an else statement but that doesn’t seem to be helping. The debugger is actually complaining about line two when the field is empty so how do i exclude it when there is no data submited in assigned_facilities field? I`m already using required=False, allow_null=True inside the serializer.

    def create(self, validated_data):
        assigned_facilities = validated_data.pop("assigned_facilities")
        instance = Lead.objects.create(**validated_data)

        for item in assigned_facilities:
            instance.leadfacility.create(**item)

        else:
            print("No Facilities Added!")
            
        return instance

Asked By: Matthias

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Source

Answer 1

You can add default value in pop function, so it wont raise keyerror

    def create(self, validated_data):
        assigned_facilities = validated_data.pop("assigned_facilities", [])
        instance = Lead.objects.create(**validated_data)

        for item in assigned_facilities:
            instance.leadfacility.create(**item)

        else:
            print("No Facilities Added!")
            
        return instance

Answered By: Utkucan Bıyıklı

KeyError: How to exclude certain parts when a part of the serializer is empty

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