CODEWITHSUNDEEP
pythondjangopython-3.xdjango-rest-frameworkpostman
Hisham
Hisham

Reputation: 253

Pass variable (non-model-field) to serializer in django rest framework

I added a non model field to my serializer but after I hit api it returns the field as None value it doesn't store the value to use it in serializer function

serializers.py

class LeaveTeamSerializer(serializers.ModelSerializer):
    user_id = serializers.SerializerMethodField()

    class Meta:
        model = Team
        fields = ['id', 'name', 'user_id', 'players']

    def get_user_id(self, *args, **kwargs):
        user_id = None  # kwargs['context']['request'].user_id
        return user_id # user_id it's not who did the request it is other user_id

    def update(self, instance, validated_data):
        user_id = validated_data.get('user_id')
        user = self.context['request'].user

        if user_id is None or user_id == '':
            instance.players.remove(user)
        else:
            instance.players.remove(user_id)
        instance.save()
        return instance

views.py

class LeaveTeamListAPIView(RetrieveUpdateAPIView):
    queryset = Team.objects.all()
    serializer_class = LeaveTeamSerializer

    def get_queryset(self):
        return Team.objects.filter(players=self.request.user) and Team.objects.filter(admin=self.request.user)

json put request

{
    "user_id":"22",
    "name":"a"
}

what i need is retrieve user_id (not the user who did the request but it is other user_id) value from json request as above json code to serializer class to use it in if statement.

please any one has the solution help me I tried to over ride the context but it didnt work fine with me

thanks

Edit

`class LeaveTeamSerializer(serializers.ModelSerializer):
    user_id = serializers.CharField(write_only=True)

    class Meta:
        model = Team
        fields = ['id', 'name', 'user_id', 'players']

    def update(self, instance, validated_data):
        user_id = self.user_id
        print(user_id)        
        user = self.context['request'].user

        if user_id is None or user_id == '':
            instance.players.remove(user)
        else:
            instance.players.remove(user_id)
        instance.save()
        return instance

`

Upvotes: 2

Views: 6642

Answers (1)

JPG
JPG

Reputation: 88559

Use serializers.CharField() instead of serializers.SerializerMethodField() along with write_only=True flag as

class LeaveTeamSerializer(serializers.ModelSerializer):
    user_id = serializers.CharField(write_only=True)
    # .... your code


Note: Don't forgot to remove get_user_id() method from your current code snippet

Upvotes: 2

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